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Question: A good quarterback can throw a football at 27m/s (about 60mph ). If we assume that the ball is caught at the same height from which it is thrown, and if we ignore air resistance, what is the maximum range in meters (which is approximately the same as the range in yards) of a pass at this speed? How long is the ball in the air?
In an experiment designed to measure the strength of a uniform magnetic field produced by a set coils, find the angular frequency of revolution of the electrons
Calculate the speed of an electron in the 7th Bohr orbit. (Express your answer to three significant figures.) ×105m/s 2) Calculate the angular momentum of an electron in the 7th Bohr orbit. (Express your answer to three significant figures)
A projectile of mass m is fired from the ground with an initial speed vi at an angle of q above the horizontal. At the highest point of its arc, it explodes into three pieces, A, B and C, all of equal mass. Immediately after the explosion, pieces A a..
A force of -4.4 x 103 N exists between a positive charge of 8 x 10-4 C and a negative charge of -3 x 10-4 C. What distance separates the charges?
A doubly charged helium atom whose mass is 6.6 10 to 27 kg is accelerated by a voltage of 2200 V. What will be its radius of curvature if it moves in the plane perpendicular to a uniform 0.308 T field?
A spring with spring constant k = 210N/m is at first compressed x = 1.90 cm. It is now allowed to relax back to its equilibrium length and then it is stretched an additional 2.30 cm. How much work is completed by the spring during this process.
question it is crash-test-dummy eds first day on the job. he and his 50-kg mass gets to try out the new 1200-kg porsche
A 100 ohm resistor is immersed in a constant temp bath at 300 K. A current of 10 amps flows through the resistor and a steady state is achieved
Each summer along the Oregon coast there is a contest for archers. People line the beaches and wait for a low-flying airplane to pass overhead loaded with goodies.
What is happening with the parameters (pressure, volume, and temperature) of an air bubble released by a frog at the bottom of a lake? Explain why.
a wire is 1.2 m long and has a mass of 0.027 kg. the wire is stretched between two points and when driven by an
After 2.12 days, the activity of a sample of an unknown type radioactive material has decreased to 84.6% of the initial activity. What is the half-life of this material
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