Calculate the Kinetic energy of: 1. a rabbit weighing 10
kg moving at a speed of 5 m/s.
Answer:
125
Explanation:
use the formula e=1/2mv² and use m=10 and v=5
this produces the equation e=1/2x10x25=125
dont forget the units (J) ;)
Answer:
125J
Explanation:
K.e=1/2mv^2
=1/2(10)(5)^2
=125J
1.
How do the individual forces compare when the rider experiences a normal
sensation of weight? What is the acceleration value when this occurs?
Answer:
The rider experiences weight or does not experience weight depends upon the direction of the elevator in which it moves and its acceleration.
Explanation:
Consider the mass of a rider as m. So its actual weight is mg and it acts vertically downward. The apparent weight of the rider is depended on the acceleration of the elevator and its direction of movement.
When elevator moves with a constant speed i.e. its acceleration is zero, the apparent weight of the rider is equal to the actual weight. Thus the rider's sensation is normal.
If the elevator is moving upward with an acceleration a, then the apparent weight of the rider will be more and the rider will experience an increase in weight or the sensation is heavy.
Or when the elevator moves downward with an acceleration a, the apparent weight of the rider is less. And the rider sensation is lighter.
The acceleration will become "0 (zero)". A further solution to the question is provided below.
Individual pressures neutralize or negate each other out if somehow the riding experiences stable weight, implying that perhaps the rider's cumulative acceleration will be zero,Now,
→ \(mg= W+F\)
or,
→ \(g= a+g\)
then,
→ \(a =0\)
This means that the rider isn't moving. Thus the response above is appropriate.
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Question 5 of 32
According to the periodic table below, which element has the largest average
atomic mass?
OA. Helium (He)
OB. Oxygen (0)
OC. Nitrogen (N)
OD. Neon (Ne)
if you 235lb traviling north at 75mph and strike a 150 lb deer going 35mph east what is the force
We need to use the formula: Force = Mass × Acceleration Let's use the given values to calculate the force exerted on the deer when it is hit by the car. The car weighs 235 lb and it is traveling north at 75 mph. The deer weighs 150 lb and it is going 35 mph east. Force = 44045 lbSince the force is a vector quantity, it has both magnitude and direction.
Step 1: Convert the velocities into feet per second.1 mile = 5280 feet1 hour = 3600 seconds So, the velocity of the car is:75 mph = (75 × 5280) ÷ 3600 = 110 feet/secondThe velocity of the deer is:35 mph = (35 × 5280) ÷ 3600 = 51.3 feet/second
Step 2: Find the components of velocity of the deer. The velocity of the deer is in the east direction, so we need to find its horizontal component, vx, and its vertical component, vy. If the angle between the deer's velocity and the x-axis is θ, then: vx = v × cosθandvy = v × sinθv = 51.3 feet/secondθ = 90° - arctan(0 / 110) = 90°So,vx = 51.3 × cos90° = 0 feet/second vy = 51.3 × sin90° = 51.3 feet/second
Step 3: Find the net velocities of the car and the deer. Since the car is moving north and the deer is moving east, the net velocity of the car and deer together can be found using the Pythagorean theorem. Net velocity = √[(vx + 110)² + vy²]Net velocity = √[(0 + 110)² + (51.3)²]Net velocity = √(12100 + 2631.69)Net velocity = √14731.69Net velocity = 121.3 feet/second
Step 4: Find the net momentum of the car and the deer. Net momentum = (mass of car × velocity of car) + (mass of deer × velocity of deer)Net momentum = (235 × 110) + (150 × 121.3)Net momentum = 25850 + 18195Net momentum = 44045 lb ft/second
Step 5: Find the force exerted on the deer. Force = Net momentum ÷ time Here, time is the duration of the collision which is not given in the problem. We will assume it to be 1 second. Force = 44045 ÷ 1
Force = 44045 lb Since the force is a vector quantity, it has both magnitude and direction. The direction of force is along the line of impact which is not given in the problem.
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29.which of the following is a benefit gained from dancing this is mapeh please answer it quickly I need it
Answer:
improved condition of your heart and lungs. increased muscular strength, endurance and motor fitness. increased aerobic fitness. improved muscle tone and strength.
Explanation:
yup
select all the options that correctly describe the rules followed when determining a molecular electron configuration. multiple select question. the number of electrons in molecular orbitals is equal to the sum of all bonding electrons. all bonding molecular orbitals are filled before antibonding molecular orbitals. hund's rule is applied when electrons are placed in molecular orbitals of equal energy. each molecular orbital can accommodate a maximum of two electrons.
The number of electrons in molecular orbitals is equal to the sum of all bonding electrons.
Hund's rule is applied when electrons are placed in molecular orbitals of equal energy. Each molecular orbital can accommodate a maximum of two electrons.
All bonding molecular orbitals are filled before antibonding molecular orbitals, is not a universal rule.
In some cases, bonding and antibonding orbitals might be filled concurrently or in a way that depends on the specific molecular configuration.
Therefore, The correct options are first, Third and Forth.
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please verify these answers
Section 2 Problem Solving (60 Points) Do at least 3 of the 4 problems Problem 3 (15 Points] A camera flash circuit consisting of 3 AA batteries in series, a capacitor and a flash bulb is shown in the
Based on the information you provided, it seems that the question is related to a camera flash circuit consisting of 3 AA batteries in series, a capacitor, and a flash bulb.
The circuit is an excellent example of a capacitor discharge circuit, also known as a flash circuit.The capacitor in the circuit stores energy, which is then released to power the flash bulb, producing a bright light that illuminates a dark area. In such a circuit, the capacitor is charged by the batteries in series to its maximum voltage. When the switch is activated, the capacitor discharges its energy to the flash bulb, lighting it up. The capacitor will continue to discharge until the voltage across it is zero.
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Question 5
5. What subatomic particle has no electrical charge?
•neutron
•proton
•electron
•atom
Answer: A Neutron.
I know this is correct. Thank's and yw :3
A piece of ice absorbs heat and melts. Which statement best describes the
changes in the ice as it melts?
A. The potential energy of the particles increases as intermolecular
forces are overcome.
B. The potential energy of the particles increases as the temperature
increases.
C. The kinetic energy of the particles increases as the temperature
increases.
D. The kinetic energy of the particles increases as intermolecular
forces are overcome.
Answer:
a
Explanation:
a p ex
The potential energy of the particles increases as intermolecular forces are overcome.
When a substance such as ice melts, its temperature increases. Water molecules become less orderly and they spread apart.
What is potential energy ?"Potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors." An object can store energy as the result of its position. For example, the heavy ball of a demolition machine is storing energy when it is held at an elevated position. This stored energy of position is referred to as potential energy. Similarly, a drawn bow is able to store energy as the result of its position.
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a positively charged particle travels along the path shown in the figure above through region 1 and between two parallel plates in region 2. a magnetic field exists in region 1, and one of the plates in region 2 is at a higher potential than the other. what is the direction of the magnetic field in region 1, and which plate is at a higher potential in region 2 ?
The direction of the magnetic field in region 1 is perpendicular to the plane of the page and pointing into the page. The plate at a higher potential in region 2 is the one towards which the positively charged particle is deflected.
The positively charged particle will experience a force due to the magnetic field as it travels through region 1. The direction of this force is given by the right-hand rule, which states that if you point your right thumb in the direction of the particle's velocity and your fingers in the direction of the magnetic field, then the direction of the force on the particle is perpendicular to both and is given by your palm. In this case, the force is perpendicular to the plane of the page and pointing into the page.
In region 2, the positively charged particle will experience a force due to the electric field between the two parallel plates. The direction of this force is determined by the potential difference between the plates. Since one plate is at a higher potential than the other, the particle will be deflected towards that plate.
The direction of the magnetic field in region 1 is into the page, and the plate at a higher potential in region 2 is the one towards which the positively charged particle is deflected.
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Which action has more power
Equipment used to measure the volume of the brass pieces
I believe a scale is good
12 A car travels in a straight line at speed v along a horizontal road. The car moves
against a resistive force F given by the equation
F = 400+kv²
where F is in newtons, v in ms-1 and k is a constant.
At speed v = 15ms-1, the resistive force F is 1100 N.
a
Calculate, for this car:
i the power necessary to maintain the speed of 15ms-¹,
ii the total resistive force at a speed of 30 ms-¹,
iii the power required to maintain the speed of 30ms-¹.
Answer:
i) Power = Force * Velocity = 1100 * 15 = 16500 W = 16.5 kW(ii) Find the value of k first: F = 400 + k(15^2) k = 28/9 F = 400 +(28/9)(30^2) = 320
Explanation:
Which statements describe a situation in which work is being done? Check all that apply.
why does a blue star and red star able to have the same luminosity??
If a reddish and a bluish star have the same luminosity, then the reddish star must be larger than the bluish star. This is again due to the Stefan-Boltzmann law; since the cooler, red star must have more surface area than a hot blue star to produce the same luminosity.
An airplane accelerates down a runway at 3.10m/s^2 for 41.5 seconds from rest until it finally lifts off the ground . What is the displacement before take off
Answer:1720m
Explanation:
Uh
Use the drop-down menus to determine which state of matter is described in each statement.
The atoms in a
are closely packed, but able to slide past each other.
The atoms in a
spread as far apart as possible.
A
has a definite shape and volume.
The shape of a
can change, but the volume is definite.
Answer:
Explanation:
There are three states of matter; solid, liquid and gaseous states.
The solid state of matter has it's particles tightly packed with very restricted or no movement within the molecule hence the reason for it's definite shape.
The liquid state of matter has it's particles with a free movement (better than solid but not as free as gases) within the molecule hence it's particles are loosely packed within the molecule. Hence, they (liquids) assume the shape of the container in which they are stored and they move freely when released from the container.
The gaseous state of matter has it's particles totally loosely packed as a result of it's particles moving freely and colliding against one another.
Thus, we can use the above descriptions to answer the statements from the question.
1) The atoms in a ----- are closely packed, but able to slide past each other. Answer: From the description above, it can be deduced that the atoms here are in a solid because the particles within a solid are closely packed.
2) The atoms in a -------- spread as far apart as possible.
Answer: The atoms here are in gaseous form because, as described earlier, they are loosely packed and can thus be as far apart as possible.
3) A ----- has a definite shape and volume.
Answer: As described earlier, a solid substance would have a definite shape and volume because it's particles are tightly packed.
4) The shape of a ----- can change, but the volume is definite.
Answer: The substance here is a liquid because the particles are free (but not as free as gases) and would have a definite volume but will assume the shape of the any container they are placed in (hence they have an irregular shape).
Answer:
The atoms in a
✔ liquid
are closely packed, but able to slide past each other.
The atoms in a
✔ gas
spread as far apart as possible.
A
✔ solid
has a definite shape and volume.
The shape of a
✔ liquid
can change, but the volume is definite.
Explanation:
If an engine does 400 J of work in 5 s, how much power was generated?
A.8W
B.8000W
C.800W
D.80w
Answer:
the answer is c
Explanation:
Calculate the man’s mass. (Use PE = m × g × h, where g = 9.8 N/kg.)
A man climbs a wall that has a height of 8.4 meters and gains a potential energy of 4,620 joules. His mass is about
kilograms
Answer:
mass=56.12kg
Explanation:
PE=mgh
4620=m×9.8×8.4
make m subject of the formula...
m =4620/(9.8×8.4)
m=4620/82.32
m=56.12kg
Which of the following determines the identity of an atom?
A. atomic mass
B. mass number
C. atomic number
D. charge
Using the conductor sizing guide, what conductor ampacity is needed for a 10-horsepower, 230-volt, single-phase motor: a.50 A
b.60 A
c.62.5 A
d.87.5 A
The correct conductor ampacity for a 10-horsepower, 230-volt, single-phase motor is option c. 62.5 A.
The ampacity of a conductor is a measure of the maximum amount of electrical current that can flow through it safely. The ampacity required for a motor is based on the size of the motor and the voltage of the electrical system. There are standard methods for determining the minimum ampacity for a given motor and voltage, such as the National Electric Code (NEC) and the American National Standards Institute (ANSI). The NEC and ANSI both state that the minimum ampacity for a 10-horsepower, 230-volt, single-phase motor is 62.5 amperes. It's important to note that using a conductor with ampacity lower than the recommended one may cause the motor to overheat and fail, leading to damage or even fire hazard.
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9. Determine the total capacitance between points A and B. D н А- В с E с C C с с с c
Answer:
Determine the total capacitance between points A and B in the figure below. C =104F C = 5uF C=20uF MAE ce Select the best answer: 2.84uF 2.80uF O 2.90pF 2.86F
Explanation:
hoped it help cutie if u need more help js ask meh
susan drops her camara in the river from a bridge that is 250 feet high. How long does it take the camara to fall 250 feet?
It takes around 4 seconds for the camera ro fall 250 feet
use the quadratic formula where a=-16 b=0 and c=250
How does the thermodynamic laws (0th, 1st, 2nd, 3rd) describe boiling water?
0th Law of Thermodynamics: The 0th law of thermodynamics states that if two systems are in thermal equilibrium with a third system, they are in thermal equilibrium with each other.
Law's of Thermodynamics:In the case of boiling water, this law applies when the temperature of the water is equal to the boiling point of water (100°C).]
1st Law of Thermodynamics: The 1st law of thermodynamics states that energy can be neither created nor destroyed, only transformed from one form to another. In the case of boiling water, this means that the energy used to heat the water is converted to kinetic energy, which is then used to convert liquid water to gaseous steam.
2nd Law of Thermodynamics: The 2nd law of thermodynamics states that the entropy of the universe always increases. In the case of boiling water, this means that the heat energy released when the water is converted to steam is dispersed into the environment, resulting in an increase in entropy.
3rd Law of Thermodynamics: The 3rd law of thermodynamics states that the entropy of a perfect crystal at absolute zero temperature is zero. In the case of boiling water, this law does not apply since the water is not a perfect crystal and is not at absolute zero temperature.
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Which gives you a frame of reference for your speed when you are riding a train?
Answer:
anything stationary
Explanation:
anything that is not moving outside the train like passing trees or the train's station is considered to be a frame reference.
How did the lab activities help you awnser the lesson question, “ How do atmospheric conditions influence weather patterns?” What did you learn from conducting this lab?
Answer:
In the lab activity, I used a virtual watershed to demonstrate how pollutants enter and flow through the watershed. I constructed food chains to show how biotic factors are related. I also predicted and modeled how human activity affected the biotic factors in an ecosystem. Based on my observations, I can conclude that biotic and abiotic factors are closely linked and that human activity that changes the environment, like pollution, can affect all the other parts of an ecosystem in a negative way.
Explanation:
what force must be applied to roll a 120-pound barrel up an inclined plane 9 feet long to a height of 3 feet (disregard friction)?
A force of 40 pounds must be applied to roll the 120-pound barrel up the inclined plane to a height of 3 feet, disregarding friction.
To calculate the force required to roll a 120-pound barrel up an inclined plane disregarding friction, we can use the concept of mechanical advantage. The force required can be determined using the formula:
Force = Weight * (Vertical distance / Inclined distance)
In this case, the weight of the barrel is 120 pounds, the vertical distance is 3 feet, and the inclined distance is 9 feet.
Force = 120 pounds * (3 feet / 9 feet)
Simplifying the equation, we have:
Force = 120 pounds * (1/3)
Force = 40 pounds
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Explain why the power of a train's engine must be increased to maintain the speed while travelling up a slope
Answer:
the power (outside) of the train must be increased for the increase in resistance by the weight component.
Explanation:
We analyze the movement of the train at constant speed, on flat ground the force of the motor must counteract the friction force that opposes the movement, therefore to maintain the constant speed the two forces must be of the same magnitude.
When the train goes up a slope, it is subjected to two forces: the friction force that opposes the movement and a component of the weight in the opposite direction to the movement, therefore the power (outside) of the train must be increased for the increase in resistance by the weight component.
an electrically charged object can be used to attract:
An electrically charged object can be used to attract any object with an opposite charge.
This is due to the fundamental principle that opposites attract and repel in physics.
Electric charge is a fundamental property of matter that gives rise to electromagnetic interactions. An electric charge, whether positive or negative, produces an electric field that surrounds it. This field exerts a force on any other charge in its vicinity that is either attracted to or repelled from it. Electric charge is a fundamental property of matter that produces a variety of electric phenomena. When the charge is concentrated in a localized region of space, the object is electrically charged. When there is a net accumulation of charge in an object, it becomes electrically charged. An electrically charged object produces an electric field in its vicinity, which exerts a force on other charged objects. An electrically charged object can be used to attract objects with an opposite charge or repel objects with the same charge.
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a store owner plans to hang a sign weighing 750 n so that cable a, attached to the store, makes a 30.0 degree angle to the vertical side of the building. cable b is horizontal and attached to an adjoining building. what is the tension in cable b?
A remains constant, the tension in cable B can be calculated using the formula T = W/sin(θ), where T is the tension, W is the weight of the sign, and θ is the angle formed by cable A. the tension in cable B is 750N/sin(30°) = 1333.38N.
what is cable ?
Cable is a type of wiring system used to transmit electrical signals. It consists of insulated conductors, usually copper, twisted together in a pattern that reduces interference from external sources. Cables are often used to connect components within a system, such as computers, televisions, and audio systems.
They can also be used to connect systems to each other, such as connecting a laptop to a router or connecting a router to a modem. Cables can be used to carry data as well as power. Depending on the type of cable, it can support various types of data transfer speeds and resolutions. For example, HDMI cables are used to transmit audio and video signals in high-definition.
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