PLEASE HELP: An engineer is designing a runway. She knows that a plane, starting at rest, needs to reach a speed of 140mph at take-off. If the plane can reach this take-off speed in 60.0s, how far will the plane travel before take-off. Assume the plane increases speed steadily. How far does the plane need to travel during take-off (in given units)?
Answers
Using kinematics we can find that the take-off distance is 6163 ft
Given parameters
The initial and final speed of the plane i = 0 and v = 140 mph Time t = 60.0 sTo find
The distance to take off
The measurement system allows not to have problems when working in different units, in this case we reduce the speed units
v = 140 mile / h (5280 ft / mile) (1h / 3600 s) = 205.34 ft / s
The kinematics allows to find the relationships between the position, the speed and the acceleration of a body, in this case the movement is in one dimension.
v = v₀ + a t
where v and v₀ are the final and initial velocity, respectively, at acceleration and t the time
a = \(\frac{v-v_o}{t}\)
a = \(\frac{205.34 - 0}{60.0}\)
a = 3.42 ft / s²
Let's use the expression
v² = v₀² + 2 a x
Where v and v₀ are the final and initial velocity, respectively, at acceleration and x the distance traveled
x = \(\frac{v^2 - v_o^2 }{2 \ a}\)
x = \(\frac{205.33^2 - 0}{2 \ 3.42}\)
x = 6163.8 ft
Let's reduce to miles
x = 6163.8 ft (1 mile / 5280 ft)
x = 1.17 mile
In conclusion using kinematics we can find that the take-off distance is 6163 ft
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Related Questions
explain the methods to determine specific charge of an electron ?
Answers
The methods to determine the specific charge of an electron are The J. J. Thomson Method and The Millikan Oil Drop Method.
The J. J. Thomson Method
In this method, an electric field is created between two parallel metal plates. Electrons are accelerated by this field from the negative plate to the positive plate. After that, they strike a fluorescent screen. When the electrons are shot through the electric field perpendicular to the magnetic field, they experience the Lorentz force, which is given by the formula: $F= evB$ $F= evB$
When a magnetic field is applied at right angles to an electron beam, it bends the path of the beam into a circular path. The radius of the path of an electron beam in a magnetic field is determined by the relationship:r = mv/eB. As a result, the specific charge of an electron may be calculated from the expression: $e/m = 2V / B^2r^2$
The Millikan Oil Drop Method
This is another technique for determining the specific charge of an electron. The oil drop experiment was first done by Robert A. Millikan in 1909. He did this experiment by suspending charged droplets of oil in a uniform electric field between two parallel plates.
The fall of the oil droplets in the absence of an electric field was also noted. The fall velocity of the oil droplet was determined by measuring the time taken by the oil droplet to pass through a fixed distance between the plates in the absence of an electric field. By measuring the electric field strength, the voltage applied to the plates, and the fall velocity of the oil droplet, the specific charge of the electron was determined.
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The methods to determine the specific charge of an electron are :
The J. J. Thomson Method The Millikan Oil Drop Method.How do we describe?In the J. J. Thomson Method, an electric field is created between two parallel metal plates. Electrons are accelerated by this field from the negative plate to the positive plate. After that, they strike a fluorescent screen.
When the electrons are shot through the electric field perpendicular to the magnetic field, they experience the Lorentz force.
The Millikan Oil Drop Method is an experiment by which is created by suspending charged droplets of oil in a uniform electric field between two parallel plates.
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Some dragonflies splash down onto the surface of a lake to clean themselves. After this dunking, the dragonflies gain altitude, and then spin rapidly at about 1100 rpm to spray the water off their bodies. When the dragonflies do this "spin-dry," they tuck themselves into a "ball" with a moment of inertia of 2.0×10−7kg⋅m2 . How much energy must the dragonfly generate to spin itself at this rate?
Answers
The dragonfly must generate approximately 4.8 × 10^-4 Joules of energy to spin itself at a rate of 1100 rpm.
Start by converting the rotational speed from rpm (revolutions per minute) to rad/s (radians per second). Since 1 revolution is equal to 2π radians, we can use the conversion factor:
Angular speed (ω) = (1100 rpm) × (2π rad/1 min) × (1 min/60 s)
ω ≈ 115.28 rad/s
The moment of inertia (I) is given as 2.0 × 10^-7 kg⋅m².
Use the formula for rotational kinetic energy:
Rotational Kinetic Energy (KE_rot) = (1/2) I ω²
Substituting the given values:
KE_rot = (1/2) × (2.0 × 10^-7 kg⋅m²) × (115.28 rad/s)²
Calculate the value inside the parentheses:
KE_rot ≈ (1/2) × (2.0 × 10^-7 kg⋅m²) × (13274.28 rad²/s²)
KE_rot ≈ 1.331 × 10^-3 J
Round the result to the proper number of significant figures, which in this case is three, as indicated by the given moment of inertia.
KE_rot ≈ 4.8 × 10^-4 J
Therefore, the dragonfly must generate approximately 4.8 × 10^-4 Joules of energy to spin itself at a rate of 1100 rpm.
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How long a muscle can exert a force without getting tired is known as
O muscular endurance
Resistance training
O Plyometrics enforcement
O Muscular strength
Answers
Answer: the first option muscular endurance
Explanation:
In a (n)__ relationship with two variable one increase other decreases
Answers
Answer:
n53
Explanation:
sorry
Answer: Negative correlation
Explanation: Negative correlation is a relationship between two variables in which one variable increases as the other decreases, and vice versa. In statistics, a perfect negative correlation is represented by the value -1.0, while a 0 indicates no correlation, and +1.0 indicates a perfect positive correlation.
please help (science)
Plate Boundaries on Earth
Plate boundaries represent parts of the Earth where plates come in contact with one another. There are different ways in which these plates can move and interact. In this assignment, you will identify each type of plate movement and create an illustration to represent this.
Open the worksheet to get started. Use the criteria below to see what you should include in this assignment.
Row 1: Plate Boundary (Movement)
Write the type of plate boundary: convergent, divergent, transform.
Write the correct description for each in parentheses below the name: sliding, separating, or colliding.
Row 2: Diagram
Draw a diagram or illustration of the plate movement at the plate boundary. Include arrows to show whether the plates are colliding, separating, or dividing.
Row 3: Lithosphere (Created or Destroyed)
Identify whether the Earth's crust is created or destroyed at this type of plate boundary.
Row 4: Geologic Process
Give at least one example of the type of process or geological event that occurs on the Earth when the plates move in this manner.
Row 5: Real World Example
Give at least one example of a place on the planet where this type of plate movement is demonstrated along the plate boundary. Include both the location and name of the example.
Row 6: References
This assignment requires you to conduct formal research. When researching, make sure to use only valid and reliable resources; Wikipedia, blogs, and answer sites are not valid or reliable. References must be cited in APA format. Please provide your references in APA format in this column.
Answers
Plate Boundaries on Earth assignment involves identifying and illustrating different types of plate movements at the Earth's contact points.
Here are the steps to be followed:
Step 1: Understanding the Assignment Requirements
Read through the assignment instructions carefully to ensure a clear understanding of the tasks and expectations.
Step 2: Research
Start by conducting research on plate boundaries, their types, movements, and associated geological processes. Use reliable and valid resources such as scientific journals, textbooks, and reputable websites. Take notes on the different plate movements, their characteristics, and examples of each.
Step 3: Worksheet Setup
Create a table or chart with six rows corresponding to the six categories specified in the assignment instructions: Plate Boundary (Movement), Diagram, Lithosphere (Created or Destroyed), Geologic Process, Real World Example, and References.
Step 4: Fill in Row 1 - Plate Boundary (Movement)
In the first row, list the three types of plate boundaries: convergent, divergent, and transform. Next to each type, write the correct description in parentheses: sliding, separating, or colliding.
Step 5: Fill in Row 2 - Diagram
In the second row, draw a diagram or illustration for each type of plate movement. Use arrows to indicate the direction of movement and whether the plates are colliding, separating, or sliding past each other.
Step 6: Fill in Row 3 - Lithosphere (Created or Destroyed)
In the third row, identify whether the Earth's crust is created or destroyed at each type of plate boundary. Note the corresponding effects of plate movement on the lithosphere.
Step 7: Fill in Row 4 - Geologic Process
In the fourth row, provide at least one example of a geologic process or event that occurs as a result of plate movement at each type of boundary. This could include processes like subduction, seafloor spreading, or earthquakes.
Step 8: Fill in Row 5 - Real World Example
In the fifth row, give at least one real-world example of a location where each type of plate movement is demonstrated along a plate boundary. Include the name of the location and its corresponding plate boundary type.
Step 9: Fill in Row 6 - References
In the final row, provide the references for your research in APA format. Include the sources you used to gather information on plate boundaries, plate movements, and related geological processes.
Step 10: Review and Proofread
Review the completed assignment, ensuring that all information is accurate and properly cited. Proofread for any grammatical or spelling errors.
Note: The specific format and layout of the worksheet may vary based on your preference or instructor's instructions. Make sure to follow any specific formatting guidelines provided by your instructor.
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an 80-n uniform plank leans against a frictionless wall as shown. the vertical component of force at point p applied to the plank by the floor is:
Answers
The net torque needed to balance is 120N
Weight of the plank W = 80N
Length of the inclined plane S = \(\sqrt{9 + 16}\) = 5
Cos θ = 3/5
Net torque needed to balance is τ = W Cos θ s/2
τ = 120 N
The study's subject also refers to torque as a moment, moment of force, rotational force, or turning effect. It is possible to think of torque as the linear force's rotational counterpart. It stands for a force's capacity to alter the body's rotational motion. Archimedes' studies on the use of levers, which are reflected in his well-known saying, "Give me a lever and a place to stand. and I shall move the Earth." similar, led to the development of the concept. a linear force pushes, similar to that. A torque is a movement that twists about or pulls an object. a certain axis. When the strength of the force is multiplied by the angle at which the line of action is perpendicular, torque is the outcome.
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How do astronomers determine the surface temperature of stars? *
Answers
Answer:
To the extent that Stellar spectra look like blackbodies, the temperature of a star can also be measured amazingly accurately by recording the brightness in two different filters. To get a stellar temperature: Measure the brightness of a star through two filters and compare the ratio of red to blue light.
Explanation:
student wearing frictionless in-line skates
on a horizontal surface is pushed by a friend
with a constant force of 46 N.
How far must the student be pushed, starting from rest, so that her final kinetic energy
is 352 J ?
Answer in units of m.
Answers
The distance at which the student must be pushed is 7.65 m.
What is distance?Distance is the length between two points.
To calculate the distance at which the student must be pushed, we use the formula below.
Formula:
d = W/F................ Equation 1Where:
d = DistanceF = Force applied to the student by his friendW = Final kinetic energy of the studentFrom the question,
Given:
W = 352 JF = 46 NSubstitute these values into equation 1
d = 352/46d = 7.65 mHence, the student was pushed through a distance of 7.65 m.
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The specific heat of water is 4,186 J/kg.'C. Approximately how much heat must
be removed from 0.500 kg of water to change its temperature from 24.0°C to
5.00°C?
Answers
Explanation:
Q= mc∆T
∆T= 5-24=- 19
Q= 0.5*4186*-19
Q= -39767 J
negative sign show heat releases
Which formula is used to find an objects acceleration
Answers
Answer:
a=∆v/∆t
Explanation:
The definition of Acceleration is the change in velocity in a given time. So this means you first calculate ∆v (Change in velocity), and you calculate ∆t which is the time taken to apply that change in velocity. Then you find a= ∆v/∆t. This gives us the equation of Acceleration.
Answer:
C. a=∆v/∆tExplanation:
what specific heat capacity of a silver metal if 55.0 g of absorbs 197.9 joules of heat and the temp rises 15 degrees Celsius?
Answers
The specific heat capacity of silver is {c} = 0.24 J/(kg °C).
What is specific heat capacity?The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases by 1 °C. Its units are J/(kg °C).
Given is that 55g of silver absorbs 197.9 joules of heat and the temperature rises by 15 °C.
Mathematically, we can write the specific heat capacity as -
Q = mcΔT
where -
{Q} → heat energy
{m} → mass
{c} → specific heat capacity
{ΔT} → change in temperature
We can write -
Q = mcΔT
197.9 = 55 x (15 - 0) x c
197.9 = 55 x 15 x c
c = 197.9/825
{c} = 0.24 J/(kg °C)
Therefore, the specific heat capacity of silver is {c} = 0.24 J/(kg °C).
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A ball of mass m makes a head-on elastic collision with a second ball (at rest) and rebounds with a speed equal to 0.370 its original speed.What is the mass of the second ball?
Answers
Answer:
The mass of the second ball is \(m_2 = 2.175m \ kg\)
Explanation:
From the question we are told that
The mass of the first ball is m
Let assume
The original speed of the first ball is \(u_1\)
The rebound speed is \(v_1 = 0.370u_1 \ m/s\)
According to the law of momentum conservation
\(m_1 u_1 + m_2 u_2 = -m_1 v_1 + m_2 v_2\)
The second ball is at rest so
\(u_2 = 0\)
And the negative sign shows that it is a rebound velocity
\(mu_1 + = -m v_1 + m_2 v_2\)
=> \(mu_1 + = -0.370 mu_1 + m_2 v_2\)
Now we are told that the collision is elastic, this means that the velocity of approach will be equal to the velocity of separation
So
\(u_1 = v_1 + v_2\)
=> \(u_1 = 0.370u_1 + v_2\)
=> \(v_2 = 0.63 \ u_1\)
substituting this into equation above
\(mu_1 + = -0.370 mu_1 + m_2 (0.63 u_1)\)
\(1.370 mu_1 = m_2 (0.63 u_1)\)
=> \(m_2 = 2.175m \ kg\)
The mass of the second ball in terms of the first ball, m, is 2.175 m.
The given parameters;
mass of the ball, = mlet the initial velocity of the first ball, = u₁initial velocity of the second ball, u₂ = 0final velocity of the first first ball, v₁ = 0.37u₁Apply the principle of conservation of linear momentum to determine the mass of the second ball as shown below;
\(m_1 u_1 + m_2 u_2 = m_1v_1 + m_2 v_2\\\\mu_1 + m_2(0) = m(-0.37u_1) + m_2v_2\\\\mu_1 = -0.37u_1m + m_2v_2\\\\mu_1 + 0.37mu_1 = m_2v_2\\\\1.37 mu_1 = m_2 v_2 \ --(1)\)
Apply one-dimensional velocity equation for elastic collision;
\(u_1 + v_1 = u_2 + v_2\\\\u_1 + (-0.37u_1) = 0 + v_2\\\\u_1 -0.37u_1 = v_2\\\\v_2 = 0.63 u_1\)
substitute the value of v₂ into the above equation;
\(1.37mu_1 = m_2(0.63u_1)\\\\1.37mu_1 = 0.63m_2u_1\\\\m_2 = \frac{1.37mu_1}{0.63u_1} \\\\m_2 = 2.175 \ m\)
Thus, the mass of the second ball in terms of the first ball, m, is 2.175 m.
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Drag each label to the correct location on the image.
Match the government activities to the different fiscal policies.
government is spending
less than what it earns
budget indicates a surplus
budget indicates a deficit
government is spending
more than what it earns
Contractionary Fiscal Policy
government is spending more
on infrastructure development
Expansionary Fiscal Policy
Answers
Matching the government activities to the different fiscal policies.
Contractionary Fiscal Policy:
budget indicates a surplus
government is spending less than what it earns
Expansionary Fiscal Policy:
government is spending more on infrastructure development
budget indicates a deficit
government is spending more than what it earns
When the government is spending less than what it earns, it has a budget surplus. This indicates that the government is collecting more revenue than it is spending. This is an example of a contractionary fiscal policy because it reduces the amount of money circulating in the economy, which can help control inflation.
When the government is spending more than what it earns, it has a budget deficit. This indicates that the government is spending more money than it is collecting in revenue. This is an example of an expansionary fiscal policy because it injects more money into the economy, which can stimulate economic growth.
When the government is spending more on infrastructure development, it is an example of an expansionary fiscal policy because it increases government spending and stimulates economic growth.
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Explain/Describe how atoms in domains determine whether a material is magnetic or not. (Please help this is due today)
Answers
Answer:
In a material, the magnetic behavior depends on the alignment of magnetic moments of the atoms. Magnetic moments are generated by the motion of the electrons in the atoms. When the magnetic moments of atoms in a material are aligned in a specific pattern, it creates a magnetic field which results in the material being magnetic.
In many materials, the magnetic behavior arises due to the alignment of magnetic domains, which are regions of atoms with magnetic moments aligned in the same direction. When many domains with aligned magnetic moments are present in a material, the material becomes magnetic.
The magnetic behavior of a material depends on the number of electrons and the arrangement of those electrons in the atoms. In particular, for an atom to have a magnetic moment, it must have unpaired electrons, meaning electrons that are not paired with another electron with the opposite spin. When these unpaired electrons in the atoms are aligned, they generate a magnetic moment. If all electrons are paired, there will not be a net magnetic moment, so the material will not be magnetic.
So, in summary, the magnetic behavior of a material is determined by the alignment of magnetic moments of atoms. When the magnetic moments of many atoms in a material align in the same direction, it creates a magnetic field, leading to a material being magnetic. This alignment is usually present in magnetic domains consisting of atoms with unpaired electrons.
I’ll give brainliest
Answers
The waveform of a signal is the shape of its graph as a function of time in the domains of electronics, acoustics, and allied sciences, regardless of its time and magnitude scales or any shift in time.
Thus, Waveforms with periodic variations are those that recur consistently at set intervals.
The phrase is typically used in electronics to describe periodically changing voltages, currents, or electromagnetic fields. It is typically used in acoustics to describe constant periodic sounds caused by changes in air pressure or other media.
In these situations, the signal's frequency, amplitude, or phase shift have no bearing on the waveform, which is a characteristic. Additionally, non-periodic signals like chirps and pulses can be referred to by this name.
Thus, The waveform of a signal is the shape of its graph as a function of time in the domains of electronics, acoustics, and allied sciences, regardless of its time and magnitude scales or any shift in time.
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Which
type of energy transformation is taking place when natural gas is used to heat water?
O chemical energy into thermal energy
thermal energy into mechanical energy
mechanical energy into electromagnetic energy
electromagnetic energy into chemical energy
Answers
Answer:
O chemical energy into thermal energy
Hope this helped!!
Answer:
chemical energy into thermal energy
Explanation:
In hiking, what fitness component is required of you
Answers
4. Solve 3x2 - 7x - 4 = 0 by completing the square. (10)
Answers
Answer:
（3x - 4）（x - 1）
Explanation:
Your question is wrong
A runner is moving at a speed of 20 m/s. How much distance would they cover in 10 seconds?
Answers
Answer:
200 meters
Explanation:
20 x 10 = 200
I really need your help I will mark you brainliest!
I have been stuck for 15 minutes!!
Answer the following questions about Hurricane Harvey:
a. Why did hurricane Harvey travel from the east (Africia) twards the west (Florida) when our weather starts in the west and travels east?
B. why did hurricane harvey rotate counterclockwise? Do all hurricanes rotate counterclockwise?
Answers
4. A sodium ion has a +1 relative atomic charge which indicates it has one more proton than electron.
This ion is placed in a 4.00 NC electric field. Remember, the charge of one relative atomic charge is 1.60 x 10-19
a. Calculate the force applied to a single sodium ion in this electric field.
Answers
Answer:
a
Explanation:
2. A crane can lift a 500 kg mass to height of 30 m in 2 minutes. The power at which the crane is operating is
A. 125 Watts
B. 1225 Watts
C.) 7500 Watts
D. 73500 W
Answers
The power at which the crane operates, if it can lift a mass of 500 kg is 1225 Watts.
What is power?Power is the rate at which work is done.
To calculate the power the crane operates with, we use the formula below
Formula:
P = mgh/t............................... EquationWhere:
P = Powerm = Massg = Acceleration due to gravityh = Heightt = TimeFrom the question,
Given:
m = 500 kgh = 30 mt = 2 minutes = 2×60 = 120 sg = 9.8 m/s²Substitute these values into equation 1
P = (500×30×9.8)/120P = 1225 WHence, the right option is B. 1225 Watts.
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____is the distance traveled during a specific unit of time
Answers
A certain cylinder has a height of 10.0 cm and a radius of 5.0 cm. To how many significant figures can its volume be determined?
Answers
Answer:
The volume of a cylinder is given by the formula V = πr^2h, where r is the radius and h is the height. Substituting the given values, we get:
V = π(5.0 cm)^2(10.0 cm) = 785.4 cm^3
The radius and height are both given to two significant figures, so the answer should also be reported to two significant figures. Therefore, the volume of the cylinder can be determined to 780 cm^3.
Explanation:
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Why does overexposure to UV light often result in sunburn when overexposure to visible light does not? This is why you can get sunburnt even on a cloudy day.
options:
UV light carries less energy than visible light and cannot penetrate the human body.
UV light carries more energy than visible light and can break bonds at the cellular level.
UV light carries less energy than visible light and can penetrate the human body.
UV light carries more energy than visible light, so it cannot break bonds at the cellular level.
Answers
Answer:
UV light carries less energy than visible light and cannot penetrate the human body.
Overexposure to UV light rays results in sunburn because UV rays carry more energy than visible light. UV rays can easily penetrate into the human body and can cause damage to cells.
What are UV light rays?
Ultraviolet radiation is a form of electromagnetic radiation with a frequency range of 100-400nm. The frequency and wavelength are inversely proportional. UV rays have a shorter wavelength than visible light.
It is a non-ionizing radiation that is emitted from the sun. It is considered non-ionizing radiation because the photons of UV rays lack energy to ionize atoms. The UV rays are produced by artificial sources like mercury-vapor lamps, electric arcs, etc.
When UV rays interact with organic molecules, they cause chemical and biological effects on the molecules. UV rays have higher frequencies than visible light. The energy of UV rays is higher than that of visible light.
UV rays can cause damage to DNA and are involved in the breaking of bonds because of their high energy. Overexposure to UV rays can cause suntan and sunburn which leads to skin cancer. It is also responsible for Vitamin D which is essential for humans.
Hence, UV light carries more energy than visible light and can break the bonds at the cellular level. Thus, option B is correct.
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can someone help me answer this question? A student connected an ammeter as shown in this picture. Did the student connect the ammeter correctly? Explain
Answers
Answer:
No - It is connected in parallel instead of series
Explanation:
The answer is No, the reason behind the answer that the ammeter is connected in parallel which is wrong it must be connected in series.
What is Ammeter?An ammeter is a device for detecting electric current in amperes, either directly (DC) or alternating (AC). Due to the fact that a shunt running parallel to the meter carries the majority of the electricity at high current values, the digital multimeter can measure a wide range of current values. A circle with the capital A in it serves as the icon for an ammeter for circuit diagrams.
The moving coil of the electrodynamics ammeter rotates in the field created by the fixed coil. It measures alternating and direct current with 0.1 to 0.25 percentage points (by converting Ac power To DC power using a rectifier).
The ammeter is connected in series and, on the other hand, the voltmeter is connected in parallel.
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A light ray strikes the surface of crown glass (n = 1.520), at a 25° angle with respect to the normal from air (n = 1.000293), and leaves the glass, returning to the air. Determine the angle at which the light refracts when it moves from air into the crown glass.
Answers
The angle at which the light refracts when it moves from air into the crown glass is 23.3°.
Refraction is the bending of light as it passes through a medium with a different density. It occurs due to a change in the speed of light as it enters a different medium.
We can use Snell's law to solve this problem, which states that the ratio of the sines of the angles of incidence and refraction is equal to the ratio of the refractive indices of the two media:
n1 sin θ1 = n2 sin θ2
where n1 and n2 are the refractive indices of the initial and final media, and θ1 and θ2 are the angles of incidence and refraction, respectively.
From the problem, we have:
n1 = 1.000293 (air)
n2 = 1.520 (crown glass)
θ1 = 25°
We can rearrange Snell's law to solve for θ2:
sin θ2 = (n1/n2) sin θ1
sin θ2 = (1.000293/1.520) sin 25°
sin θ2 = 0.385
Taking the inverse sine of both sides, we get:
θ2 = 23.3°
Therefore, the angle at which the light refracts when it moves from air into the crown glass is 23.3°.
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1. Define "compressibility." Give an example from your daily life
Answers
Given an average cell is ten times the mass of a bacterium. The mass of a bacterium is 10-15 kg. And a person's mass is 65 kg.
Answers
Given the mass of the cell is 1 * 10⁻¹⁴ kg, the number of cells in the 65 kg person is 6.5 * 10¹⁵ cells.
What is the number of cells in a person weighing 65 kg?The number of cells in a human is calculated as follows:
The mass of an average cell is ten times the mass of a bacterium.
The mass of a bacterium = 1 * 10⁻¹⁵ kg
mass of an average cell = 10 * 1 * 10⁻¹⁵ kg = 1 * 10⁻¹⁴ kg
Number of cells = mass of person/mass of cell
Number of cells = 65 kg/1 * 10⁻¹⁴ kg
Number of cells = 6.5 * 10¹⁵ cells.
In conclusion, the number of cells is obtained by dividing the mass of the person by the mass of a average cell.
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Note that the complete question is given below:
Assuming the mass of an average cell is ten times the mass of a bacterium (which is 10⁻¹⁵ kg): Calculate the number of cells in a human assuming the mass of the person is 10² kg.
Carlos is riding her bicycle. His velocity is 5 m/s to the right. His acceleration is 1.2 m/s2 to the left. He is doing what?
- moving at a constant speed
- slowing down
- speeding up
Answers
Answer:
Slowing down
Explanation:
Carlos is travelling to the right as indicated by his velocity, so his velocity is +5m/s. He is also accelerating to the left which is the opposite direction to his velocity so his acceleration is -1.2m/s2 to the right.
Since his acceleration is negative relative to his velocity and direction of motion, his speed is decreasing and he is slowing down.
Hope this helped!