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A 0.700-kg ball is on the end of a rope that is 0.90 m in length. The ball and rope are attached to a pole and the entire apparatus, including the pole, rotates about the pole's symmetry axis. The rope makes an angle of 70.0° with respect to the vertical as shown. What is the tangential speed of the ball?
The school bus picks up Brian in front of his house and takes him on a straight-line 3.6 km bus ride to school in the positive direction. He walks home after school. If the front of Brian's house is the origin.
A flat sheet of crown glass has a thickness of 2.3 cm. It is on top of a flat sheet of crystalline quartz that has a thickness of 3.6 cm. Light strikes the crown glass perpendicularly.
A light bulb has a resistance of 280 ?. It is connected to a standard wall socket (120 V rms, 60.0 Hz).Determine the current in the bulb
In a ballistics test, a 25.0g bullet traveling horizontally at 1200m/s goes through a 40.0cm -thick 350kg stationary target, What average force does the bullet exert on the target
A plane electromagnetic wave propagates in a vacuum in the z-direction. What is the mathematical expression for the magnetic field
A machine shop has 100 equally noisy machines that together produce an intensity level of 90 dB. how many machines must be turned off
a motorist drives north for 35 minutes at 85 km/h and then stops for 15 minutes. he then continues north traveling 130km in 2h. what was his total displacement
A satellite 8.3x107 km above the surface of a celestial body, whose radius is 39,000 km and whose mass is 6.0x1027 kg, Which clock will be running faster
A father racing his son has two-fifths the kinetic energy of the son, who has one-third the mass of the father. The father speeds up by 1.0 m/s, What is the original speed of the father
A heat pump keeps a house warm at 72.0 degrees Fahrenheit when the outside temperature is 0 degrees Fahrenheit. How much heat is drawn in from the outside
a) calculate E1' and E2', the lorentz transformations of E1 and E2 b) calculate the distances E1E2 and E1'E2' with the four dimensional scalar product of the time position vector within itself
Assume that ABC Firm has an optimal capital structure; comprised of debt, preferred stock and common equity. In this scenario, Firm currently has 48 percent debt, 4 percent preferred stock and 57 percent common equity in its capital structure.
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