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What changes take place in the atomic structure of an element X with atomic number 88 and mass number 226,if it emits 2 alpha particles
A 1550 kg car with it's engine off starts 100 meters high on hill A. It coasts down hill A then up hill B until it stops at a height of 90 meters. How much thermal energy was generated?
A girl weighing 470N hangs suspended on the end of a rope 8 meters long. What will be her gain in potential energy when a boy swings her to one side so that the rope makes an angle of 35º with the vertical?
A kicked football leaves the ground at an angle θ = 38.8° with a velocity of 22.1 m/s. a) Calculate the maximum height (m). b) the time of travel before the football hits the ground (s). c) how far away it hits the ground (m). Assume the ball leaves the foot at ground level, and ignore air resistance and rotation of the ball.
A motorist traveling with a constant speed of 20.0 m/s passes a school-crossing corner, where the speed limit is 15.0 m/s. Just as the motorist passes, a police officer on a motorcycle at the corner starts off in pursuit with constant acceleration of 5.0 m/s^2. What is the total distance traveled by the motorist
Two identically charged one-peso coins are 1.5 m apart on a table. What is the charge of the coins if each of them experiences a repulsive force of 2.0 N?
The piston of a hydraulic automobile lift is 30 cm in diameter. What pressure, in
pascals, is required to lift a car of mass 1500 kg. Also express this pressure in
atmosphere.
A diving bell is to be designed to withstand the pressure of water at a depth of
2000 ft.
a. If sea water weighs 64 lb per cubic foot, what is the pressure at the depth?
b. What is the total force on a circular glass window 6 inches in diameter?
A certain body weighs 12N in air and 10 N in when immersed in water. Find its
total volume and its density.
When the United States finally converts officially to metric units, the Celsius
temperature scale will replace the Fahrenheit scale for everyday use. As a
familiarization exercise, find the Celsius temperature corresponding to
a. Cool room (68°F)
b. A hot summer day (95°F) and
c. A cold winter day (5°F)
