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1. Suppose you roll a ball off a tabletop. Will the time to hit the floor depend on the speed of the ball? ( Will a fast ball take a longer time to hit the floor?) Defend your answer.
2. Fragments of fireworks beautifully illuminate the night sky. ( a) What specific path is ideally traced by each fragment? ( b) What paths would the fragments trace in a gravity- free region?
3. The hang time of a basketball player who jumps a vertical distance of 2 feet ( 0.6 m) is about What will be the hang time if the player reaches the same height while jumping 4 feet ( 1.2 m) horizontally?
4. Why are satellites normally sent into orbit by firing them in an easterly direction, the direction in which Earth spins?
5. Which requires less fuel, launching a rocket to escape speed from the Moon or from Earth? Defend your answer.
two speakers are driven by the same oscillator at frequency 420 hz. one speaker is mounted on the ceiling and the
Consider drilling a tunnel among any two points on the Earth’s surface (this tunnel does not necessarily pass during the center of the Earth). Assuming that the tunnel is frictionless and that the Earth has uniform density:
During 5 successive 0.93 min intervals, a runner moves at the following constant speeds: 0.424 km/min, 0.224 km/min, 0.160 km/min, 0.160 km/min
An immersion heater must increase the temperature of 1.50 kilogram of water from 10oC to 15oC in 10 minute while operating at 110 Volt. Calculate the required resistance of the heater
A tennis player receives a volley with the ball (0.0600 kg) traveling horizontally at 54.0 m/s, What is the impulse delivered to the ball by the racquet
A horizontal force of 20.0 N is needed to hold the object at rest when it is pulled 0.200 m from its equilibrium position (the origin of the x axis).The object is now released from rest by an initial position of xi =0.200 m, and it subsequently under..
A 50 kg crate slides down a ramp that is inclined by 30 degrees from the horizontal. Calculate the amount of energy lost by the crate due to friction in its journey down the ramp
two sources produce coherent light waves that come together at a detector located 9.20000 mm from one source and
A proton is initially at rest at a point where the potential is 459 V. Sometime later the proton is at a point where the potential is 218 V. If no force other than an electrostatic force acts on the proton, what is its final kinetic energy.
a heavy stone of mass m is hung from the ceiling by a thin 8.25-g wire that is 65.0 cm long. when you gently pluck the
Two long conducting wires are 30 cm apart. One carries acurrent of 25 A, and the other carries a current of 65 A. Find all locations where the net magnetic field of the two wires are zero.
Over a time interval of 1.92 years, the velocity of a planet orbiting a distant star reverses direction, changing from +22.2 km/s to -20.5 km/s. Find (a) the total change in the planet's velocity (in m/s) and (b) its average acceleration (in m/s2) du..
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