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Q. A newly discovered planet has twice mass of the earth, but the acceleration because of gravity on the new planet's surface is exactly the same as the acceleration due to gravity on the earth's surface. What is the radius Rp of the new planet in terms of radius R of earth?
Q. A box of mass 29.9kg is subject to a horizontal applied force of 378N, and it accelerates to the right at 10.7 m/s2. What is the net x-direction force on the box?
An air molecule is moving at a speed of 438m/s. How many meters would molecule move during 7ms (milliseconds) if it didn't collide with any other molecules.
A rectangular container measuring 24 cm 48 cm 55 cm is filled with water. What is the mass of volume of water in kilograms.
How many revolutions per minute would a 29 {rm m}-diameter Ferris wheel require to make for the passengers to feel "weightless" at topmost point.
One mole of an ideal gas at 27 °C is expanded isothermally from an initial pressure of 3 atm to a final pressure of 1 atm in two ways. (a) reversible, and (b) against a constant external pressure of 1 atm. find q, w, ΔU, ΔH, ΔSsys, ΔSsurr, ΔStotal..
What is the speed of the block of clay right after the collision. What impulse does the clay exert on the block.
The minimum stopping distance for a car travelling at a speed of 30 {rm m/s} is 60 {rm m}, including the distance travelled during the driver's reaction time of 0.54 {rm s}.
Two small spheres spaced 20centimetres apart have equal charge. How many excess electrons should be present on each sphere if magnitude of the force of repulsion between them is newtons.
How far does the object compress the spring if same experiment is performed on the moon, where g = 1.63 m/s2 and air resistance is neglected.
Illustrate a new gravitational potential energy
Clifford is in a real hurry, however, and skips the speed ramp. Starting from rest with an acceleration of 0.49 m/s2, he covers the same distance as the ramp does, but in one-fourth the time. What is the speed at which belt of the ramp is moving.
A broad beam of light of wavelength 642 nm is incident at 90° on a thin, wedge-shaped film with the index of refraction 1.50. An observer intercepting light transmitted by the film sees 17 bright and 16 dark fringes along the length of the film. B..
What is the speed of the runner. What is the total translational kinetic energy of gas molecules.
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