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A rock takes 2.1 s to hit ground when it is thrown straigh up from a cliff with initial velocity of 7.5 m/s. Calculate height of the cliff in m & length it would take to reach the ground if thrown down with same speed.
A charge of 6 μC is distributed uniformly along the circumference of a circle with a radius of 35 cm. The Coulomb constant is 8.98755 × 109 N · m2/C2. How much external energy is required to bring a charge of 50 μC from infinity to the center of the ..
The distance between slitsin a double-slit experiment is decreased by a factor of 2. If the distance between fringes is small compared to the distance from theslits to the screen, the distance between adjacent fringes near the center of the interf..
If 1.00 mol of oxygen is heated at constant pressure of 1.00 atm from 10.0?C to 25.0?C. What is the change of volume of the gas in this process
(a) What minimum constant acceleration does the airplane require for it to liftoff after a takeoff run of 280 m? (Enter the magnitude only.) (b) How long does it take the airplane to reach liftoff speed?
A motorcyclist is able to ride on the vertical wall of a bowl- shaped track . his weight is counteracted by the friction of the wall on the tires. what force increase or decrease if he rides faster.
an experimenter determines that when a beam of monoenergetic electrons bombards a sample of a pure gas atoms of the gas
A 2.0 µF capacitor in a circuit in series with a resistance of 1.0 M is charged with a 6.0 Volt battery. Find how long would it take to charge the capacitor to three-fourths of its maximum voltage
If a silver wire has a resistance of 13.0 Ω at 20.0°C, what resistance does it have at 37.0°C? Neglect any change in length or cross-sectional area resulting from the change in temperature.
a skater is spinning with his arms outstretched. he has a 2-lb weight in each hand. in an attempt to change his angular
In this problem, you will apply kinematic equations to a jumping flea. Take the magnitude of free-fall acceleration to be 9.80m/s^2. What is its initial velocity as it leaves the ground
According to Coulomb's law, how much does the force among two charged points increase or decrease if the distance among them increases two times?
A pendulum consists of a 320-{\rm g} solid ball15.0 {\rm cm} in diameter, suspended with an essentially mass less string 60.0 {\rm cm} long. Compute the period of this pendulum, treating as a simple pendulum.
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