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How fast do you have to throw a 1.0 kg object from the earth's surface so that this object makes it halfway to the moon before turning around? (Neglect air resistance, even though that is a terrible approximation.) How much slower is this than the earth's escape velocity?
A -2.3nC charge is on the x-axis at x1 = -7cm and a 2.5nC charge is on the x-axis at x2 = 11 cm. At what points on the y axis is the electric potential zero
a circular roller coaster has radius 30 m. The speed at the bottom is 37.0 m/s. A 50 kg girl is sitting on a scale. What does it read in kilograms at the top of the ride
A student throws a set of keys vertically upward to his fraternity brother, who is in a window 3.60 m above. With what initial velocity were the keys thrown
Consider a heat pump which is used to cool down a home during the summer. Its coefficient of performance in cooling mode is 4.14. at what rate does it remove heat from the home
The angular position of a pendulum is represented by the equation ? = 0.0330 cos ?t, Determine the period and length of the pendulum
Describe the difference (in both what happens and why) between a person who jumps from an airplane with a parachute and one who jumps without a parachute. If a parachute is used, what would be the difference when the same size parachute is used on..
A steel wire in a piano has a length of 0.7000 m and a mass of 4.100 x 10-3 kg. To what tension must this wire be stretched so that the fundamental vibration corresponds to middle C
An electron is released from rest at the negative plate of a parallel plate capacitor and accelerates to the positive plate, What is the kinetic energy of the electron just as it reaches the positive plate
A cannon is fired from the ground. The cannonball initially travels with a speed of 300 meter per second at an angel of 25o with respect to the ground. Find how far above the ground does the cannonball get to
You have a lens whose focal length is 12.7 cm. You place an object on the axis of the lens at a distance of 6.25 cm from it. How far is the object\'s image from the lens
For one approach to this problem, consult Interactive LearningWare 24.1. For each of the three sheets of polarizing material shown in the drawing, the orientation of the transmission axis is labeled relative to the vertical. The incident beam of l..
A cart of mass m moves with a speed v on a frictionless air track and collides with an identical cart that is stationary. what is the final kinetic energy of the system
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