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Q. A planet of mass 8 × 10^24 kg is at location ‹ -4 × 10^11, 7 × 10^11, 0 › m. A star of mass 7 × 10^30 kg is at location ‹ 5 × 10^11, -5 × 10^11, 0 › m. What is the force exerted on the planet by star? (It will probably be helpful to draw the diagram, including the relevant vectors.)
Q. A 75{rm m}-long train begins uniform acceleration from rest. The front of the train has a speed of 23 {rm m/s} when it passes a railway worker who is standing 150 {rm m} from where the front of the train started. What is speed of last train compartment?
The speed of sound in air is 332 m/s at 0°C. It increased 0.60 m/s for each degree above zero. compute the speed of sound at the temperature of the room.
cientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 5.0kg projectile from rest to a speed of 4.0 x 103 m/s. The net force accelerating the projectile..
If the speed of sound is 1100 feet per second and a tuning fork oscillates at 440 cycles per second, what is the wavelength of sound produced.
At what height above the surface of the earth does the balloon have a velocity of 8.10 m/s.
An electric motor rotating a workshop grinding wheel at a rate of 93 rev/min is switched off. Assume the wheel has the constant negative angular acceleration of magnitude 2rad/s2.
A hockey puck is sliding across a frozen pond with an initial speed of 9.7 ms. It comes to rest after sliding a distance of 44.0 m. What is the coefficient of kinetic friction between puck and ice.
A child slides down a slide with the 29 degree incline, and at the bottom her speed is precisely half of what it would have been if the slide had been frictionless. Compute the coefficient of sliding between the child and the slide.
assume the film show in the figure has an index of refraction of 1.36 and is surrounded by air on both sides.
The reflecting surfaces of two intersecting flat mirrors are at the angle of 59. A light ray strikes the horizontal mirror, reflects off horizontal mirror, impinges on the raised mirror, reflects off the raised mirror and proceeds in the right-han..
A jetliner is moving at a speed of 274 m/s. The vertical component of the plane's velocity is 54.0 m/s. Conclude the magnitude of the horizontal component of plane's velocity.
The coefficient of volume epansion for diesel is 9.5*10 to the power of negative 4 degrees celcius an the coefficient of linear expansion for the steel truck is 11 times 10 mto the power of negative 6 degrees celcius.
Speedboat A negotiates a curve whose radius is 115 m. Speedboat B negotiates a curve whose radius is 194 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
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