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A ball is hit from a height of 1.05 meters. The horizontal distance to the fence is 96.9 meters. The height of the fence is 2.15 meters. The time it took for the ball to clear the fence was 3.1 seconds. What was the initial angle above the horizon that the ball in hit in degrees.
A 1.53 kg ball is attached to a ceiling by a 3.06 m longstring. The height of the room is 5.12 m. The acceleration of gravity is 9.8 m/s2. What is the gravitational potential energy associated with the ball relative to the ceiling
Suppose a star with a radius 8.5*108 has a peakwavelngth of 688 nm in the spectrum of its emitted radiation, What is the surface temperature of the star
A metal surface is susceptible to a photoelectric threshold frequency of 8.529 x 1014 Hertz. Obtain the speed of the fastest electron ejected
a supersonic wind tunnel is designed for m 3 at the test section with a throat 0.12m in area. the supply pressure and
Energy is released during a nuclear reaction due to a conversion between mass and energy. Mass is not conserved; the initial and final amounts are different. If a total of 1 gram of mass is "missing," how much energy has been released?
An x-ray photon of initial energy 50.0 keV Compton scatters from an electron that is initially at rest. find the wavelength of the back-scattered photon
A 100 g cube of ice at 0 degree Celsius is dropped into 1.0kg of water that was originally at 80 degree celsius. What is the final temperature of the water after the ice has melted?
Insects do not have lungs as we do, nor do they breathe through their mouths. Instead, they have a system of tiny tubes, called tracheae, through which oxygen diffuses into their bodies. find the oxygen concentration at the interior end of the tube
A 210 turn coil has an area of 4.8 cm2 and rotates in a magnetic field of 0.5 T. (a) What frequency will generate a maximum emf of 10 V? (b) If the coil rotates at 60 Hz, what is the maximum emf?
Assume we have a gas in thermal equilibrium at temperature T. Each molecule of the gas has mass m. what is the ratio of the number of molecules at the Earth's surface to the number at height h (with potential energy mgh)?
The car collides and becomes stuck to a 5000kg truck travelling west at along South Street at the intersection of South Street and Murdoch Drive. Illustrate what is the final velocity of the vehicles after the collision if the truck was travelling..
consider two spheres sphere 1 having a charge of -q and sphere 2 having a charge of q which are both insulating and
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