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A.) A bullet is fired from ground level with a speed of 120 m/s atan angle 45.0° above the horizontal at a location where g = 10.0m/s2. What is the vertical component of its velocity after 5seconds?
B.) A boy kicks a football with a certain initial velocity at anangle 30° above the horizontal. In 3.0 seconds, the ball reaches at its highest point in its trajectory. What is the initial velocity of the ball?
A common flashlight bulb is rated at 0.300 A and 3.00 V (the values of the current and voltage under operating conditions). If the resistance of the bulb filament at room temperature (20°C) is 2.60 ?, what is the temperature of the filament when the ..
What quantum number of the hydrogen atom comes closest to giving a 500-nm-diameter electron orbit?What is the electron's speed in this state? What is the electron's energy in this state
The lengths of the three telescopes are LA = 456 mm, LB = 640 mm, and LC = 787 mm. The focal length of the eyepieces is 3.00 mm
A photoelectric experiment using a cesium metal surface produces stopping potentials of 0.95V and 0.38V using light with wavelengths of 435.8nm and 546.1nm, respectively. find the threshold frequency
Mechanical Advantage The pulley system shown in the figure is used to lift a 52- crate. Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. Assume the masses of the chains, pulley..
You are an astronaut (m = 100 kg) and travel to a planet that is the same radius and mass as the Earth, but it has a rotational period of only 8 h. What is your apparent weight at the equator of this planet
The track lies in a vertical uniform magnetic field vector B. Generator G produces a constant current i in the wire and the rails (even as the wire moves). Find the velocity of the wire's motion as a function of time, assuming it to be stationary..
A box of bananas weighing 40.0 Newton rests on a horizontal surface. If no horizontal force is applied to the box and the box is rest, find how large is the friction force exerted on the box
a woman and her dog are out for a morning run to the river which is located 3.51 km away. the woman runs at 3.75 ms in
Through a nuclear accident, 410m3 of emergency cooling water at 23C are injected into a reactor vessel where the reactor core is producing heat at the rate of 200 MW. If the water is allowed to boil at normal atmospheric pressure, how long will it ta..
Two long, parallel wires separated by 4.50 cm carry currents in opposite directions. The current in one wire is 1.20 A, and the current in the other is 3.45 A. Is the force attractive or repulsive
Riders on the Tower of Doom, an amusement park ride, experience 2.0 second of free fall, Determine what is a 65 kilogram rider apparent weight as the ride is coming to rest
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