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A ball player hits a home run, and the baseball just clears a wall 21.0 meter high located 130.0 meter from home plate. The ball is hit at an angle of 35.0 degree to the horizontal, and air resistance is negligible. Suppose the ball is hit at a height of 1.0 meter above ground. Determine what is the initial speed of the ball?
The photograph shows an electron beam whose initial direction of motion is horizontal, from right to left. A magnetic field deflects the beam downward. What is the direction of the magnetic field?
The moon has a mass of 7.36 1022 kg and moves about the earth in a circular orbit of radius 3.80 108 m with a period of 27.3 days. Find the moon's kinetic energy as observed on earth
q1. a bumper car with mass m1 108 kg is moving to the right with a velocity of v1 4.6 ms. a second bumper car with
the tub of a washer goes into its spin-dry cycle starting from rest and reaching an angular speed of 7.0 revs in 13.0
A meteor has a speed of 77.0 m/swhen 700 km above the Earth. It isfalling vertically (ignore air resistance), How much thermal energy is produced
A 2.00-m tall basketball player is standing on the floor 10.0 m from the basket. If he shoots the ball at a 30 degree angle from the horizontal, at what initial speed must he throw the ball so that it goes through the basket without striking the back..
If the wavelength of ultrasound in soft tissue is 0.308 mm, what is the frequency producing this wavelength
a parallel-plate capacitor has plates separated by 0.76 mmpart a if the electric field between the plates has a
Unpolarized light with intensity 370 W/ m^2 passes first through a polarizing filter with its axis vertical, What light intensity emerges from the second filter
An electron is suspended at a distance of 1.38 cm above a uniform line of charge. What is the linear charge density of the line of charge. Ignore end effects.
A 1500 kg car traveling at 90 km/h east collides with a 3000 kg cartraveling at 60 km/h south. What is the direction of motion of the cars after collision
A wheel of radius .1m and mass of 20kg rotates at 100rpm. what constant angular acceleration must be applied to the wheel
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