mars rover when the mars rover was deployed on the surface of mars in july 1997, radio signals took about 12 min to travel from earth to the rover. part a how far was mars from earth at that time? express your answer using two significant figures.
a 35.0-cm long spring is hung vertically from a ceiling and stretches to 41.5 cm when a 7.50-kg weight is hung from its free end. (a) find the spring constant. (b) find the length of the spring if the 7.50-kg weight is replaced with a 195-n weight.
4. a certain light truck can go around a flat curve having a radius of 150 m with a maximum speed of 32.0 m/s. with what maximum speed can it go around a curve having a radius of 75.0 m?
two objects, one less massive than the other, collide elastically and bounce back after the collision. if the two originally had velocities that were equal in size but opposite in direction, then which one will be moving slower after the collision?
a standing observer perceives a train whistle to have a frequency of 300 hz. if the train is moving towards the observer at a velocity of 25 m/s, what is the frequency of the sound waves emitted from the train? assume the speed of sound is 300 m/s.
during the experiment, when you got a standing wave, the amplitude of the wave became much bigger than the amplitude of the oscillator. what was the reason for this? type your answer in the space provided below the question.
a certain freely falling object requires 1.05 s to travel the last 33.0 m before it hits the ground. from what height above the ground did it fall?
if the speed of a car is increased by 70%, by what factor will its minimum braking distance be increased, assuming all else is the same? ignore the driver's reaction time.
very fine smoke particles are suspended in air. the translational rms speed of a smoke particle is 2.45 10-3 m/s, and the temperature is 288 k. find the mass of a particle?
a 0.70 kg ball is moving horizontally at 7.3 m/s when it strikes a vertical wall and rebounds with speed 2.2 m/s. what is the magnitude of the change in its linear momentum?
Horizontal and vertical motions of a projectile are independent of each other. What is meant by this?.
What is the force required to overcome the static friction of a 78kg sled on fresh snow? The friction coefficient of the sled on snow is 0.05.
Horizontal and vertical motions of a projectile are independent of each other. What is meant by this?.
