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A tennis ball is thrown from ground level with velocity vo directed 30 degree above the horizontal. If it takes the ball 1.0 s to reach the top of it's trajectory , what is the magnitude of the initial velocity?
A proton has a mass of 1.67 x 10^-27 kg and a charge of 1.60 x 10^-19 C. What is the gravitational force on a single proton at Earth's surface.
A 8.05 k? and a 7.05 k? resistor are connected in parallel. This combination is then connected in series with a 2.95 k, what is the maximum voltage that can be applied across the whole network
A 60.0-g object is attached to a horizontal spring with a force constant of 15.0 N/m, What is the velocity of the object when it is halfway to the equilibrium position if the surface is frictionless
A ranger in a national park is driving at 52 km/h when a deer jumps onto the road 86 m ahead of the vehicle. After a reaction time of t s, the ranger applies the brakes to produce an acceleration of -2.9 m/s2.
A ceiling fan is turned on and a net torque of 1.6 N·m applied to the blades. What is the angular acceleration of the blades
On your wedding day your lover gives you a gold ring of mass 3.98 g. 59 years later its mass is 3.73 g. On the average how many atoms were abrated from the ring during each second of your marriage? The atomic mass of gold is 177 u.
A lab team rides a ski lift to the top of the mountain, due to some congestion their ears fail to pop, that is the pressure inside the ear does not equalize with the outside atmosphere. Calculate the force on the eardrum
Donovan Bailey set a world record for the 100-m dash on July 27, 1996. find the time that was recorded on Earth
A pendulum clock has an aluminum pendulum exactly 1.0m long when the clock is calibrated perfectly. The temperature increases by 9?C. By how much is it off at the end of one day
You decide to determine the depth of a tank of water using the sun's light. With the sun overhead, the tank's bottom is lit, Approximately how deep is the tanks
An ideal gas in a piston is placed in a refrigerator, which removes 686 J of energy from the gas via cooling. find the net change in the internal energy of the gas in the piston
An excited electron in Na atom emits radiation at a wavelength 589nm and returns to the ground state. If the mean time for the transition is 20ns, ineherent width in the emission line.
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