Hendry throws an object vertically upwards at a velocity of 26,5 m⋅s-1 from the
edge of a cliff of height 120m. After some time, the projectile lands on the
ground below the cliff After 1 second, Cathy fires a second object upwards FROM THE
GROUND BELOW with a velocity of 45 m⋅s-1. Calculate the time and
distance will the two objects meet.
Answers
Hendry and Cathy will each throw an object, and the time and location at which they will collide can be determined using the laws of motion. Hendry's item had an initial velocity of 26.5 m/s, whereas Cathy's object had an initial velocity of 45 m/s. Hendry's object's equation of motion is given by: s = u*t + 0.5*a*t*2, where s is the displacement, u*t* is the starting velocity, t* is the time, and a*t* is the acceleration brought on by gravity.
The acceleration caused by gravity is negative since the item is being flung upward. The item that Cathy threw has the following equation of motion: s = u * t - 0.5 * a * t2.where s is the distance travelled, u is the starting speed, t is the passage of time, and an is the acceleration brought on by gravity. The acceleration caused by gravity is negative since the item is being flung upward.
These equations allow us to determine the location and timing of the two items' collision. By figuring out the two equations for t, one may determine the moment when the objects will collide. By changing the value of t in either equation, one may determine the distance at which the objects will collide. Therefore, using the equations of motion, it is possible to determine the moment and distance at which the two objects will collide.
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Related Questions
A proton (+1.6 × 10−19 C) moves 20 cm on a path in the direction of a uniform electric field of strength 2.4 N/C. How much work is done on the proton by the electrical field?
Answers
W=Fd
F=Eq
W=Eqd
E = 2.4 N/C
q = 1.6×10⁻¹⁹ C
d = 20 cm = 0.2 m
W = 2.4(1.6×10⁻¹⁹)(0.2)
W = 7.68×10⁻²⁰ J
Compare sound and earthquake waves
Answers
When materials vibrate, waves are created that travel through the substance, and this energy is what we hear as sound. Earthquakes are earth vibrations that cause the (potential) energy held within rocks to be released (as a result of their pressure-generating relative positions). Seismic waves are produced by earthquakes.
How do sound waves and earthquakes compare?
The waves lose energy as they move through the air with sound or through the ground with shaking during an earthquake. Therefore, a band can be heard louder close to the stage than farther away, and an earthquake can be felt more strongly close to the fault than farther away.
In actuality, sound in the air cannot match how quickly earthquake waves move. In rock, the compressional or "P" wave of an earthquake moves at the In actuality, sound in the air cannot match how quickly earthquake waves move. The speed of a P wave is typically 10,000 mph. The speed of sound through air is roughly 750 mph.
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A bus of mass 2500 kg goes round a corner of radius 50 m at a speed of 5 m/s. What force is needed for the bus to go round the corner?
Answers
Answer:
force needed for the bus to go round the corner is 50,000 N.
Explanation:
To find the force needed for the bus to go round the corner, we can use the formula for centripetal force:
F = (mv^2)/r
where F is the centripetal force, m is the mass of the object, v is the velocity of the object, and r is the radius of the circular path.
Plugging in the values given in the problem, we get:
F = (2500 kg)(5 m/s)^2 / 50 m
= 50,000 N
So the force needed for the bus to go round the corner is 50,000 N.
Three 5 Ohm resistors are connected in parallel to a 9 Volt power supply. What is the current through each resistor?
Answers
Answer:
I₁ = I₂ = I₃ = 12 A
Explanation:
Since the resistors are connected in parallel across a battery. Hence, the voltage across each of them will be the same, which will be equal to the voltage of the power supply. Since each resistor has the same resistance of 5 Ω. Therefore. the current across each resistor will also be the same. We can easily calculate these current values by the use of Ohm's Law, as follows:
\(V = IR\\I_{1}=I_{2}=I_{3}=\frac{V}{R} \\\\I_{1}=I_{2}=I_{3}=\frac{9\ Volt}{5 \Omega}\\\\\)
I₁ = I₂ = I₃ = 12 A
If you increase the weight of an object, the frictional force increases but the coefficient does not change why
Answers
Answer:
The coefficient of friction should in the majority of cases, remain constant no matter what your normal force is. When you apply a greater normal force, the frictional force increases, and your coefficient of friction stays the same. Here's another way to think about it: because the force of friction is equal to the normal force times the coefficient of friction, we expect (in theory) an increase in friction when the normal force is increased.
One more thing, the coefficient of friction is a property of the materials being "rubbed", and this property usually does not depend on the normal force
Below is an outline of Louis Pasteur's swan-neck flask experiment. What can you conclude from his results? Alr escapes from open end of flask. Microorganisms from air settie in bend. 88=-= Years Hours days 1 Broth storized air escapes Broth allowed to cool slowly- air enters 5 Broth stays store Indefinitely Bacteria multiply in broth 4 Flask tiled so that the sterile broth comes in contact with micro- organisms from air. Spontaneous generation is incorrect Only life can beget life Microbes can be found in the air Vital forces cannot travel up the swan-neck flask. Without it, nothing can survive in the broth Spontaneous generation is still a valid theory. The bacteria in the broth came from the broth itself
Answers
The term "spontaneous generation" is erroneous. Only life can give birth to more life. Airborne microbes can be detected.
What is experiment?A scientific experiment is any method that uses measurements and tests to confirm or deny a theory. A hypothesis is a notion that looks to be true but has yet to be confirmed, from which a study might be created. A basic experiment often addresses a "What would happen if...?" cause-and-effect inquiry. For example, you're wondering if misting a plant with water helps it develop faster. You get a sense of how the plant grows without being misted and then compare it to how it grows after being misted.
Here,
The phrase "spontaneous generation" is incorrect. Only life can create more life. Microbes in the air can be detected.
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what is the acceleration of an object that has a mass of 10kg and is pushed with a force of 50 N. just answer this question with the number no unit
Answers
Answer:
a = 5 [m/s²]
Explanation:
We know from Newton's second law that the sum of forces on a body is equal to the product of mass by acceleration.
∑F = m*a
where:
F = total force = 50 [N]
m = mass = 10 [kg]
a = acceleration [m/s²]
Now replacing:
\(a = \frac{F}{m} \\a=50/10\\a = 5 [m/s^{2} ]\)
Polio is a disease that can cause paralysis. Doctors treated patients with casts and braces, but the work of Elizabeth Kenny led to the use of hot baths and exercise to treat polio victims. These patients had less incidence of paralysis. Kenny’s ideas and their acceptance were due to
Answers
Kenny’s ideas and their acceptance were due to open-mindedness because she led to the use of hot baths and exercise to treat polio victims.
Who was Elizabeth Kenny?Elizabeth Kenny was a world-renowned nurse from Australia who develop a treatment for poliomyelitis, a very serious viral disease caused by poliovirus.
Elizabeth Kenny's ideas were controversial because they may be considered to be against conventional medical treatments.
In conclusion, Kenny’s ideas and their acceptance were due to open-mindedness because she led to the use of hot baths and exercise to treat polio victims.
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prepare a report on why a vehicle needs to be maintained/serviced after a certain period of time. How is servicing different in a petrol/diesel and electric vehicle?
Answers
Vehicles need to be serviced for several reasons such as preventing costly repairs and improving fuel economy.
Why should cars be maintained and / or serviced ?First, regular maintenance can help to prevent costly repairs down the road. Second, maintenance can help to improve fuel economy and emissions. Third, maintenance can help to keep your vehicle safe and reliable.
The servicing requirements for petrol/diesel and electric vehicles differ in a number of ways. Petrol/diesel vehicles require oil changes more frequently than electric vehicles. This is because petrol/diesel engines use oil to lubricate the moving parts, while electric motors do not. Petrol/diesel vehicles also require tune-ups more frequently than electric vehicles.
This is because petrol/diesel engines have more moving parts that need to be synchronized, while electric motors have fewer moving parts.
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A clarinet behaves like a tube closed at one end. If its length is 1.0 m, and the velocity of sound is 344 m/s, what is its fundamental frequency (in Hz)
Answers
Answer:
Fundamental frequency = 1376Hz
Fundamental frequency of it is 86 Hz.
What is frequency?In physics, frequency is the number of waves that pass a fixed point in a unit of time as well as the number of cycles or vibrations that a body in periodic motion experiences in a unit of time.
After moving through a sequence of situations or locations and then returning to its initial position, a body in periodic motion is said to have experienced one cycle or one vibration.
Given parameters:
Length of the one end closed tube; L = 1 m.
Velocity of sound; v = 344 m/s.
We have to find, fundamental frequency of it: f₀ = ?
We know that frequency of one end closed tube is given by: f = (2n−1)v/4L where; n = 1, 2, 3, 4, .....
So, for n = 1; fundamental frequency is given by: f₀ = v/4L = 344/(4×1) Hz. = 86 Hz.
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A soccer ball is traveling at a velocity of 50 m/s. The kinetic energy of the ball is 500 J. What is the mass of the soccer ball? (Formula: )
Answers
The mass of the soccer ball with a kinetic energy of 500J and traveling with 50m/s is 0.2 kg.
What is the mass of the soccer ball?Kinetic energy is simply a form of energy an object possesses due to its motion.
It is expressed as;
K = (1/2)mv²
Where m is mass of the object and v is its velocity.
Given the data in the question;
Velocity of ball v = 50m/sKinetic energy K = 500 J = 500 kgm²/s²Mass of the ball m = ?Plug the given values into the above formula and solve for m.
K = (1/2)mv²
2K = mv²
m = 2K / v²
m = 500kgm²/s² / (50m/s)²
m = 500kgm²/s² / 2500m²/s²
m = 0.2kg
Therefore, the mass of the ball is 0.2 kg.
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If the ball rebounds with only half the velocity it comes in with, what is the magnitude of the impulse in kg m/s?
Answers
A 15000N crane pivots around a friction-free axle at its base and is supported by a cable making a 25 degree angle with the crane. The crane is 16m long and is not uniform, its center of gravity being 7m from the axle as measured along the crane. The cable is attached 3m from the upper end of the crane. (a) When the crane is raised to 55 degrees above the horizontal holding an 11000N pallet of bricks by a 2.2m very light cord, find the tension in the cable.
Answers
The planet Skaro has 4 times the gravitational field strength and the same radius as the Earth.
How does the mass of the planet Skaro compare with the mass of Earth?
Answers
Answer: mSkaro = 4mEarth
Explanation:
Trust me
Question 2 of 25
If JKLM is a parallelogram, what is the length of LM?
K
18
8
M
O A. 10
O B. 18
O C. 8
D. 26
SUBMIT
Answers
Answer:its 10
Explanation:
Answer:
8
Explanation:
PLEASE HELP ALL I NEED IS A DRAWING, i posted this like 100 times please help.
Answers
Answer:
Hope this helps
Explanation:
i need help i was at school in high school because i am in 9 grade a kid name summer ebby is makeing me mad she never stops talking she makes me mad and upset she says like can i ask a question or can i ask you she never stops talking what i should do if a student do not stops talking
Answers
Do lighting filters use additive or subtractive properties to bring light of a certain color to our eyes?
Answers
Answer:
Different colour lights (RBG) uses additive properties to bring light of a certain color to our eyes.
Explanation:
:))
The polar jet stream is an air current that moves from west to east near Earth’s poles. Which statements demonstrate a way in which this air current could be changed by moving continents?
the polar jet stream marked on a map of Earth, blowing from west to east near Earth's north and south poles
Moving continents might decrease the total amount of ocean water on Earth.
Moving continents could change the amount of sunlight that reaches Earth.
Continents with high mountains might obstruct the flow of the polar jet stream.
Moving continents may increase the average temperature of Earth.
Moving continents could disrupt ocean currents, which help drive air movement.
Answers
Continents with high mountains might obstruct the flow of the polar jet stream. Moving continents could disrupt ocean currents, which help drive air movement.
How high mountains impact air flow?The presence of high mountains on a continent can affect the flow of air currents, including the polar jet stream. The mountains can cause the air to rise, creating areas of high pressure, which can deflect or slow down the flow of the jet stream.
How ocean currents chaneg?Changes in ocean currents caused by the movement of continents can also have an effect on the polar jet stream. Ocean currents help to regulate the temperature of the Earth's surface, which can in turn impact the temperature and flow of air currents, including the polar jet stream.
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Araon is nervous about his ap biology quiz. While studying he paces around the room. over a 120 second period, he moves 3m forward, 2.5 back, 7m forward, 10m back and 2m forward what was the average speed
Answers
total distance = 3 + 2.5 + 7 + 10 + 2 = 24.5
total time = 120 seconds
therefore 24.5/120 is
0.2m per second.
. Acceleration is the rate at which/what hap-
pens?
Answers
2 A rectangular storage tank 4 m long by 3 m wide is filled with paraffin to a depth
of 2 m. Calculate:
a the volume of paraffin
c the weight of paraffin
b the mass of paraffin
d the pressure at the bottom of the tank due
to the paraffin
1m
Answers
For a rectangular storage tank filled with paraffin to a depth of 2 m, the volume, weight, mass of paraffin, and pressure at the bottom of the tank are:
a. The volume is 24 m³.
b. weight is 240,000 N,
c. mass is 24,490 kg, and
d. pressure is 23,530 Pa.
a) The volume of paraffin in the rectangular storage tank can be calculated using the formula:
Volume = Length x Width x Depth
Given:
Length = 4 m
Width = 3 m
Depth = 2 m
Substituting the values into the formula, we have:
Volume = 4 m x 3 m x 2 m
Volume = 24 m³
Therefore, the volume of paraffin in the tank is 24 cubic meters.
b) The weight of the paraffin can be calculated using the formula:
Weight = Volume x Density x Acceleration due to gravity
The density of paraffin varies, but we can assume a typical value of 10,000 kg/m³. The acceleration due to gravity is approximately 9.8 m/s². Substituting these values into the formula:
Weight = 24 m³ x 10,000 kg/m³ x 9.8 m/s²
Weight = 240,000 N
Therefore, the weight of the paraffin in the tank is 240,000 Newtons.
c) The mass of the paraffin can be calculated using the formula:
Mass = Density x Volume
Substituting the given values:
Mass = 10,000 kg/m³ x 24 m³
Mass = 24,490 kg
Therefore, the mass of the paraffin in the tank is 24,490 kilograms.
d) The pressure at the bottom of the tank due to the paraffin can be calculated using the formula:
Pressure = Weight / Area
The area of the bottom of the tank is equal to the length multiplied by the width. Substituting the values:
Area = 4 m x 3 m
Area = 12 m²
Pressure = 240,000 N / 12 m²
Pressure = 20,000 Pa
Therefore, the pressure at the bottom of the tank due to the paraffin is 20,000 Pascals (Pa).
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Tom applied 10 000J of heat energy to four (4) metals A, B, C and D. All the metals were of the same mass and were initially at the same temperature. After heating the metals the temperature change was noted as shown in the table below. Metal 9 A.25 B.35 C.10 D.15 Which of these four (4) metals has the highest heat capacity?
Answers
The metal with the highest heat capacity between metals A.25 B.35 C.10 and D.15 is metal A.
How to determine heat capacity?Heat capacity is the amount of heat required to raise the temperature of a substance by one degree Celsius. Metal A has a heat capacity of 400 J/kg°C, which means that it takes 400 joules of heat to raise the temperature of one kilogram of metal A by one degree Celsius.
Metal B has a heat capacity of 285.7 J/kg°C, metal C has a heat capacity of 1000 J/kg°C, and metal D has a heat capacity of 666.7 J/kg°C. Therefore, metal A has the highest heat capacity of the four metals.
Metal A's high heat capacity means that it can absorb a lot of heat without its temperature changing very much. This makes metal A a good material for things like heat sinks and thermal insulation.
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A single-story retail store wishes to supply all its lighting requirement with batteries charged by photovoltaic cells. The PV cells will be mounted on the horizontal rooftop. The time-averaged lighting requirement is 10 W/m2 , the annual average solar irradiance is 150 W/m2 , the PV efficiency is 10%, and the battery charging/discharging efficiency is 80%. What percentage of the roof area will the PV cells occupy
Answers
Answer:
83.33% of the roof area will be occupied by the PV cells
Explanation:
Given the data in the question;
time-averaged lighting requirement \(P_{lighting\) = 10 W/m²
the annual average solar irradiance \(q_{solar\) = 150 W/m²
the PV efficiency η\(_{pv\) = 10% = 0.1
battery charging/discharging efficiency η\(_{battery\) = 80% = 0.8
we know that; Annual average power to the light = \(P_{lighting\) × A\(_{roof\)
Now, the electrical power delivered by the solar cell battery system will be;
⇒ \(q_{solar\) × A\(_{pv\) × η\(_{pv\) × η\(_{battery\)
\(P_{lighting\)A\(_{roof\) = \(q_{solar\) × A\(_{pv\) × η\(_{pv\) × η\(_{battery\)
Such that;
A\(_{pv\) = \(P_{lighting\)A\(_{roof\) / \(q_{solar\) × A\(_{pv\) × η\(_{pv\) × η\(_{battery\)
A\(_{pv\) / A\(_{roof\) = \(P_{lighting\) / \(q_{solar\) × η\(_{pv\) × η\(_{battery\)
so we substitute
A\(_{pv\) / A\(_{roof\) = 10 W/m² / [ 150 W/m² × 0.1 × 0.8 ]
A\(_{pv\) / A\(_{roof\) = 10 W/m² / 12 W/m²
A\(_{pv\) / A\(_{roof\) = 0.8333
A\(_{pv\) / A\(_{roof\) = (0.8333 × 100)%
A\(_{pv\) / A\(_{roof\) = 83.33%
Therefore, 83.33% of the roof area will be occupied by the PV cells.
Myron was trying to light a match. The first time he struck the match, the match did not light. The second time he tried, the match lit successfully.
Which most likely occurred to make the match light?
Myron increased the friction by decreasing the surface area.
Myron increased the friction by increasing speed.
Myron decreased the friction by making the match aerodynamic.
Myron decreased the friction by lubricating the match.
Answers
Answer:
B. Myron increased the friction by increasing speed.
Explanation:
i got it correct on edge
Answer:
The answer is B i think
Explanation:
A ball weighs 5.7 N on Earth. What is its mass?
Answers
Answer:
55.897905
Explanation:
1 Newton in Earth gravity is the equivalent weight of 1/9.80665 kg on Earth
9.80665 times 5.7=55.897905
Brainliest?
Can you please help me I’m confused with the negatives
Answers
Given that the mass of the ball, m = 5 kg
The initial velocity of the ball is
\(V_o=6\text{ m/s}\)The final velocity of the ball is
\(V_f=4\text{ m/s}\)We have to find the work done.
The work done can be calculated by the formula,
\(\begin{gathered} W=\text{ change in kinetic energy} \\ =\frac{1}{2}m(V_f)^2-\frac{1}{2}m(V_o)^2 \end{gathered}\)Substituting the values, the work done will be
\(\begin{gathered} W=\frac{1}{2}\times5\times(4)^2-\frac{1}{2}\times5\times(6)^2 \\ =40-90 \\ =-50\text{ J} \end{gathered}\)Thus, the work done will be -50 J
What is the result of two displacement vectors having opposite directions? Question 6 options: The resultant is the sum of the two displacements, having the same direction as the smaller vector. The resultant is the sum of the two displacements, having the same direction as the larger vector. The resultant is the difference of the two displacements, having the same direction as the smaller vector. The resultant is the difference of the two displacements, having the same direction as the larger vector.
Answers
The resultant of two displacement vectors having opposite directions is the difference of the two displacements, having the same direction as the smaller vector.
When two displacement vectors have opposite directions, it means they are pointing in opposite ways. In other words, one vector is in the opposite direction of the other. To find the resultant of these vectors, we need to subtract one vector from the other.
If we consider two displacement vectors, let's say vector A and vector B, and they have opposite directions, we can represent them as A and -B.
To find the resultant, we subtract vector B from vector A: A - (-B) or A + B.
The resultant will have the same direction as the smaller vector. This is because when we subtract a larger vector from a smaller vector, the resultant will have the direction of the smaller vector.
Therefore, the correct option is: "The resultant is the difference of the two displacements, having the same direction as the smaller vector."
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Basim’s robotics team builds a robot that travels at 9 m/s and can fire a tennis ball at a target.
Which would result in a judge who is sitting beside the testing ground observing the tennis ball having a speed of 7 m/s?
The robot fires the ball forward with a speed of 7 m/s.
The robot fires the ball backward with a speed of 7 m/s.
The robot fires the ball backward with a speed of 2 m/s.
The robot fires the ball forward with a speed of 2 m/s.
Answers
Answer:
C. The robot fires the ball backward with a speed of 2 m/s.
Explanation:
The robot fires the ball backward with a speed of 2 m/s.
To find the correct statement among all the options, we need to know about the relative velocity.
What is relative velocity?Velocity is a relative physical quantity that depends on the chosen frame of reference.
What is the mathematical formulation of relative velocity?Relative velocity=Vi-V'Where Vi is the velocity in inertial frame and V' is velocity with respect to the moving frame. Here, relative velocity=9 m/s and Vi = 7m/sSo, V'= Vi - relative velocity= 7m/s - 9 m/s = -2m/sThus, we can conclude that the robot fires the ball backward with a speed of 2 m/s.
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The circuit to the right consists of a battery (0=1.50 V) and five resistors (1=511 Ω, 2=182 Ω, 3=663 Ω, 4=234 Ω, and 5=565 Ω). Determine the current point passing through each of the specified points.
The battery V subscript 0 is connected in series via its positive terminal with resistor R subscript 1. R sub 1 is connected in series with the parallel combination of resistors R subscript 2, R subscript 3, R subscript 4, and R subscript 5. The parallel resistor combination is connected to the negative terminal of the battery.
The parallel resistor combination is configured as a rectangle with a total of four vertical branches. Each vertical branch contains a resistor. The resistors are in numerical order, with R sub 2 on the leftmost branch and R sub 5 on the rightmost branch. Resistor R sub 1 connects to the parallel combination at the midpoint of the upper horizontal leg, between the central parallel branches containing R sub 3 and R sub 4.
The circuit contains eight points labeled A through H. Point A is located on the upper horizontal leg between the parallel branches containing R sub 2 and R sub 3. Point B is located on the upper horizontal leg between the central parallel branches containing R sub 3 and R sub 4, and is to the left of the junction leading to R sub 1. Point C is located on the same horizontal leg as point B, but is to the right of the junction. Point D is located on the upper horizontal leg between the parallel branches containing R sub 4 and R sub 5. Point H is located on the lower horizontal leg between the parallel branches containing R sub 4 and R sub 5, and is opposite point D. Point G is located on the lower horizontal leg between the central parallel branches containing R sub 3 and R sub 4, opposite the junction leading to R sub 1. Point F is located on the lower horizontal leg between the parallel branches containing R sub 2 and R sub 3, opposite point A. Point E is located between the parallel resistor combination and the negative terminal of the battery.
D=
mA
G=
mA
F=
mA
Answers
Answer:
D: 0.346 mAG: 1.182 mAF: 1.478 mAExplanation:
You want the current in various circuit branches of a series-parallel circuit with a battery voltage V0 = 1.5V, a series resistor of R1 = 511 Ω, and four parallel resistors, R2–R5 = 182, 663, 234, and 565 Ω, respectively.
SolutionThere are a number of ways to solve the circuit. The one shown in the second attachment finds the combination of the parallel resistors, then determines how the total current is split among them. The values of interest include the current through R5 (node D), the sum of currents through R5 and R4 (node G), and the sum of currents through R5, R4, and R3 (node F).
If Rx is the effective resistance of the parallel combination of R2–R5, then the battery current is
I = V/R = (1.50)/(511 +Rx) ≈ 2.55254 mA
The current in any resistor Rn is this value multiplied by the fraction Rx/Rn for n=2 to 5.
Mesh CurrentsPerhaps more directly, we can write "mesh current" equations for the circuit. Letting I1–I4 represent the currents through nodes D, G, F, and E, respectively, we can write the equations ...
I1(0.565 +0.234) -I2(0.234) = 0I1(-0.234) +I2(0.234 +0.663) -I3(0.663) = 0I2(-0.663) +I3(0.663 +0.182) -I4(0.182) = 0I3(-0.182) +I4(0.511 +0.182) = 1.50The solution to these equations is shown in the first attachment. Resistances are given in kΩ so currents will be in mA.
The currents in the listed nodes are ...
D: 0.346 mAG: 1.182 mAF: 1.478 mA__
Additional comment
The third attachment shows the circuit as we understand it. The currents labeled I1–I4 are within the local loop. The "mesh current" equations match Kirchoff's Voltage Law: the sum of voltage differences around any closed loop is zero. Where a resistor is shared between loops, the voltage across it will be the (signed) sum of the two loop currents times that resistance.
