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Someone, flying a constant 200 km/h horizontally in a plane,wants 2 drop a bomb on a car traveling 150 km/h on the highway 88m below. at what angle w/ the horizontal should the car be in his sights when he drops the bomb?how do u solve this problem not knowing the distance between them?
To investigate the structure of extremely small objects, such as viruses, the wavelength of the probing wave should be about one-tenth the size of the object for sharp images. If you use light of this wavelength, what would be the energy (in eV) of..
A playground is on the flat roof of a city school, 5.4 m above the street below (see figure). The vertical wall of the building is h = 6.90 m high, Find the vertical distance by which the ball clears the wall.
The potential difference between two parallel conducting plates in vacuum is 475 V. An alpha particle with mass of 6.50×10-27 kg and charge of 3.20×10-19 C is released from rest near the positive plate. What is the kinetic energy of the alpha particl..
Some European trucks run on energy stored in a rotating flywheel, with an electric motor getting the flywheel up to its top speed of 200p rad/s. What is the kinetic energy of the flywheel after charging
It is fairly easy to strip the two electrons off a helium atom, leaving a bare nucleus of two neutrons and two protons. What is the necessary voltage difference
A rectangular block of ice 7.00 m on each side and 1.80 m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3. How high does the top of the ice block float above the water level.
A basketball player makes a jump shot. The 0.650-kg ball is released at a height of 1.90 m above the floor with a speed of 7.17 m/s, What is the work done on the ball by air resistance, a nonconservative force
A hydrogen atom has an angular momentum of 1.055x10^-34 kg.m^2/s. According to the Bohr model, what is the energy (eV) associated with this state
Two 1000 kg cars drive east; the first moving at 25 m/s, the second at 15 m/s. What is the magnitude of the total momentum of the system
Jupiter has a radius of 71,492km and a mass of 1.9x10^27kg. What is the acceleration due to gravity at Jupiter's surface
A 9.58-m ladder with a mass of 22.2 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 264 N. What is the net torque acting on the ladder
An airplane pilot fell 355 m after jumping from an aircraft without his parachute opening. He landed in a snowbank, creating a crater 1.3 m deep, estimate the work done on him by air resistance as he fell
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