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1. A freely falling object requires 1.90 s to travel the last 22.0 m before it hits the ground. From what height above the ground did it fall?
2. An attacker at the base of a castle wall 3.97 m high throws a rock straight up with speed 6.00 m/s at a height of 1.45 m above the ground.
a) If the rock will reach the top, what is its speed? If it will not, what initial speed should it have to reach the top?
b) Discover the change in speed of a rock thrown straight down from the top of the wall at an initial speed of 6.00 m/s and moving among the same two points
a defibrillator consists of a 15.4-microf capacitor that is charged to 8.2 kv.a if the capacitor is discharged in 1.0
A chunk of metal is held stationary, suspended by a string and the tension in the string is 19.6 N. What is the mass of the chunk of metal
The distance between 2 slits (d=0.155 mm) and a screen is 1.54 m. If the spacing between the 2nd order bright fringe and the 3rd order dark fringe is 3.50 mm obtain the wavelength of the light
Light enters a container of benzene at an angle of 43 deg. to the normal, Calculate the index of refraction of benzene
A man standing in front of a camera. The camera lens has a 53 mm focal length. How high is the man's well-focused image on the film
A 494 g air-track glider attached to a spring with spring constant 7.5 N/m is sitting at rest on a frictionless air track. What is the period of the subsequent oscillations
You place an ice cube in a microwave oven. If it requires 32,220 J to melt the ice cube and the oven delivers 97 W of power to the ice cube
suppose a beam of 5.0 ev protons strikes a potential energy barrier of height 6.0 ev and thickness 0.58 nm at a rate
a car is traveling on a straight road. the maximum velocity that can be attained by the car is 24 ms. the maximum
An astronaut is orbiting a black hole with a mass of2.0x1031 kg at a distance of 126km from its center. What is the net tidal force pulling his cheeks apart
Suppose the force on an object is (5i-8j) N over a displacement of (5i+2j) meters. How much work is done by that force
A solid disk is rotating with an initial angular speed of 600 revolutions per minute. how many revolutions will it have turned through by the time it stops
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