12,727 Answered Questions for the topic physics

Physics

09/23/23

The velocity of the first airplane is 740 m/h at a heading of 63.4 ◦ . The velocity of the second is 650 m/h at a heading of 184◦ . How far apart are they after 1.4 h? Answer in units of m.
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Physics

09/23/23

Modern Physics - Problem Set
7. What should be the time and place of events 1 and 2 as observed from a rocket frame moving at a velocity 0.92c relative to the lab frame? 8. In a space bus a bullet shoots forward with a speed... more
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Physics

09/23/23

Modern Physics - Problem Set
a tower whose height on the earth is exactly 150 m is lying parallel to the axis of a spacecraft. the spacecraft is moving at 0.60e relative to the earth. what is his height as measured by an... more
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Physics

09/23/23

What is the mass of the water vapor in kg
An apartment has the dimensions 11 m by 6 m by 4 m. The temperature is 20°C, and the relative humidity is 50 percent. What is the total mass (in kg) of water vapor in the air in the apartment?
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Physics

09/20/23

A bullet shot vertically into the air at +600 ft/s j. How high does the bullet rise above the ground?
A bullet shot vertically into the air at +600 ft/s j. How high does the bullet rise above the ground? What is the velocity of the bullet when it returns to the ground? Assume air friction?
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Physics

09/20/23

Projectile Motion at an Angle
" The best leaper in the animal kingdom is the puma, which can jump to a height of 3.7 m when leaving the ground at an angle of 45°. With what speed must the animal leave the ground to reach that... more
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Physics

09/20/23

on the moon, where the local gravity has a magnitude of g=1.6 m/s^2, an astronaut jumps off the edge of a crater rim. It takes her 7.2 seconds to free fall to the crater floor.
On the moon, where the local gravity has a magnitude of g=1.6 m/s^2, an astronaut jumps off the edge of a crater rim. It takes her 7.2 seconds to free fall to the crater floor.a) How high is the... more
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Physics

09/20/23

A bobsled team accelerates from rest at 6.4 m/s^2 for 8.6 seconds. After reaching this top speed, they glide down the track at a constant velocity for another 5.8 seconds.

A bobsled team accelerates from rest at 6.4 m/s^2 for 8.6 seconds. After reaching this top speed, they glide down the track at a constant velocity for another 5.8 seconds. What is the overall... more
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Physics

09/20/23

A cheetah is hiding in the grass. IT spots a zebra and bursts to a top speed of 20 m/s in a space of 48 meters.
A cheetah is hiding in the grass. IT spots a zebra and bursts to a top speed of 20 m/s in a space of 48 meters.a) What is the acceleration of the cheetah?b) how long does it take the cheetah to... more
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Physics

09/20/23

A running back start 10 yards beind the line of scrimmage (xi=-10 yds i). He runs forward at +5 yds/s until reaches a point 25 yards past the line.

A running back starts 10 yards behind the line of scrimmage (xi=-10 yds i). He runs forward at +5 yds/s until reaches a point 25 yards past the line. What is the running back's displacement and how... more
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Physics

09/19/23

Calculate the work done by gravity as a 5.6 kg object is moved from A to B in the figure(Figure 1) along paths 1 and 2. Enter your answers numerically separated by commas
https://session.masteringphysics.com/problemAsset/2326540/2/Walker.8.4.jpg
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Physics

09/19/23

A 1.3 kg block is held against a spring of force constant 2.0×104 N/m , compressing it a distance of 0.15 m. How fast is the block moving after it is released and the spring pushes it away?
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09/19/23

A circular cylinder of diameter 0.4 m rotates at 90 rpm in a uniform stream of 10 m/s.
A circular cylinder of diameter 0.4 m rotates at 90 rpm in a uniform stream of 10 m/s.(a) Locate the stagnation points(b) Calculate the rotational speed when the stagnation point moves off the... more
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Physics

09/19/23

A helium balloon has a volume of 0.003m^3. What is the force on the balloon if it’s surrounded by air? (
note: density of helium is 0.2 kg/m^3, and the density of air is 1.2 kg/m^3. i used 9.8 for gravity, and i got the Fnet to be 3.92x10^-3 N, but i’m not sure!
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Physics

09/19/23

A man is moving downward on an inclined plane (θ=37)with constant velocity v0 and rain drops appear to him moving in horizontal direction with velocity 2v0 towards him. Find the velocity of the rain.
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Physics

09/19/23

Work and a magnetic field
Magnetic part of the Lorentz force F on a change Q moving with a velocity vector V in a magnetic field B F=kQ V x B is perpendicular to the velocity V. A force that is perpendicular to the... more
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Physics

09/19/23

Physics 1 homework question
Chameleons catch insects with their tongues, which they can rapidly extend to great lengths. In a typical strike, the chameleon's tongue accelerates at a remarkable 220 m/s2 for 20 ms , then... more
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Physics

09/19/23

find the displacement vector and the angle of the displacement of a bird's travel
assume a bird is moving along at 3.00 mph in an easterly direction, the acceleration given by the wind is at a 31.0° angle to the original direction of motion, measured counterclockwise from the... more
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Physics

09/19/23

Equations for accelerated motion
A car starts from rest and reaches the speed of 10 m/s in 30s. assuming the car accelerates at a constant rate, what can you determine about the motion of the car from this info? what can't you... more
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Physics

09/18/23

How lorentz transformations work.
It's the correct transformation for going from one frame to another i mean moving frame
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09/18/23

Does Kinetic Energy increase or decrease with mass ?
In an expression for Kinetic energy KE=(mv^2)/2 KE is directly proportional to mass. On the other hand, using linear momentum p=mv, expression for KE becomes KE=p2/(2m) which is inversely... more
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Physics

09/15/23

How high above the beach was the ball when it was thrown?
Bob has just finished climbing a sheer cliff above a level beach and wants to figure out how high he climbed. All he has to use is a baseball, a stopwatch, and a friend on the ground below with a... more
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Physics

09/14/23

A nonconducting hard
A nonconducting hard rubber circular disk of radius R is painted with a uniform surface charge density σ. It is rotated about its axis with angular speed ω. Find the numerical value of magnitude of... more
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Physics

09/14/23

An electron travels
An electron travels through a particular point in an experimental apparatus with a velocity of 0.867 × 10^6 m/s at an angle of +54.7 degrees(counter-clockwise) relative to the positive x-axis in... more
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Physics

09/14/23

A 0.394 m  length
A 0.394 m  length of current-carrying wire is placed in a uniform magnetic field oriented perpendicularly to the wire. The current is 3.64 A  and the magnitude of the magnetic field is 0.303 T .... more
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