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A spring with an 7.9-kg mass is pulled back 0.25 m. If its frequency is 3.6 Hz, then find the position, velocity, and acceleration of the mass after 0.45 s.
An ideal gas is in contact with a heat reservoir to that it remains at a constant temperature of 300.0 K. How much heat flows between the gas and the heat reservoir
A sprinter running the 100 m dash has a constant acceleration of 2.8 m/s2 for the first 4.1 seconds of the race, when he reaches his top speed, and then continues to run at that speed for the rest of the race. How long does it the sprinter to run t..
A uniform, solid metal disk of mass 6.50kg and diameter 24.0 cmhangs in a horizontal plane, supported at its center by a verticalmetal wire. You find that it requires a horizontal force of 4.23 Ntangent to the rim of the disk to turn it by 3.34 degre..
What was the initial negative charge on one of the spheres, and what was the initial positive charge on the other?(Hint: Use charge conservation and solve for one of the initial charges. You will end up with a quadratic equation. The solutions giv..
A car with a total mass of 1.78 103 kg has wheels of radius 31.0 cm and moment of inertia 0.805 kg · m2. Find the car's rotational energy when the car is moving at a speed of 22.5 m/s
A circular wire loop of radius 13cm carries a current of 3.66 A. It is placed so that the normal to its plane makes an angle of 34.8° with the uniform magnetic field of magnitude 9.70 T.
For the third circuit, consisting of a single battery and two light bulbs in parallel, how does the brightness of the bulbs compare to the first circuit, What is the current through each bulb
Laser light of wavelength 400 nm illuminates an array of very narrow slits, producing an interference pattern on a screen 70 cm from the slits. compute the separation between the slits
You use a spring (K=89N/m) to pull a 45kg box across the rough floor (μ=0.13). The spring stretches 3m. What is the horizontal acceleration of the box
An airplane with a speed of 74.9 m/s is climbing upward at an angle of 38.3 ° with respect to the horizontal. Relative to the ground, determine the angle of the velocity vector of the package just before impact
At a large business, employees must report to work at 7:30 A.M. The arrival times of employees is approximately symmetric and mound-shaped with mean 7:22 A.M. and standard deviation 4 minutes.
About once every 30 minutes, a geyser known as Old Faceful projects water 18.0 m straight up into the air. Use g = 9.80 m/s2, find the speed of the water when it emerges from the ground
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