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An artillery gun is firing a shell with the initial velocity V0 =250 m/s at an angle 1 =60o to the horizontal. After some time interval t, the gun fires another shell at an angle 2 =45o. The two shells collide in the mid-air. Find the time interval t between shots.
A jet of water squirts out horizontally from a hole near the bottom of the tank, What is the height, h, of the water level in the tank
Two wheels have the same mass and radius of 4.8 kg and 0.50 m, respectively. Find the net external torque that acts on each wheel
A series RLC circuit with R = 43 Ohms , L = 270 mH , Find the maximum frequency of the frequency range over which the peak current will exceed half its value at resonance
An electron moves in the positive x-direction a distance of 2.31 m in 2.85·10-8 s, bounces off a moving proton, and then moves in the opposite direction a distance of 1.53 m in 3.33·10-8 s.
What is an actual mechanical advantage of the system
A simple pendulum has a period of 3.74 s. The acceleration of gravity is 9.8 m/s^2 What is its length? What would its period be on the Moon
The Hall voltage across a conductor in a 55 magnetic field is 1.9 . When used with the same current in a different magnetic field, the voltage across the conductor is 3.
You are trying to overhear a juicy conversation, but from your distance of 15m. It sounds like only an average whisper of 20 dB. So you decide to move closer to give the conversation a sound level of 60 dB instead. How close must you come.
A 12 kg box slides 4.0 {rm m} down the frictionless ramp, and then collides with a spring whose spring constant is 240 N/m.
In the figure, two ideal solenoids link the circuit, with the solenoids' magnetic fields directed as shown. Use Kirchoff's rules to find the current in each resistor
Suppose a tank contains 770 m3 of neon (Ne) at an absolute pressure of 1.01×105 Pa. The temperature is changed from 293.2 to 295.6 K. What is the increase in the internal energy of the neon?
Bob walks up to the crate and begins pushing with 200N of force. What is the magnitude of the frictional force now
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