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A tiny leak in a 1.00 m3 vacuum chamber causes the internal pressure to rise from 1.00 Pa to 10.0 Pa in 3.77 h when the vacuum pump is not operating.
Air leaks into the chamber from the atmosphere at 101.3 kPa, 20.0°C, and the air inside the chamber is maintained at 20.0°C by heat transfer with the walls. Determine the diameter of the leak hole.
Two spheres are cut from a certain uniform rock. One has radius 4.45 cm. The mass of the other is six times greater. Discover its radius.
an object is in front of a spherical mirror; the image of the object is upright and twice the size of the object, and it appear to be 12cm behind the mirror. what is the object distance
The Hubble's discovery of the expansion of the universe led astronomers to conclude that our universe must have started with an extreme conditions event called the Big Bang.
A certain elevator cab has a total run of 190m and a maximum speed of 305m/min, and it accelerates from rest and then back to rest at1.22m/s2. How far does the cab move while accelerating to full speed from rest?
A ball is thrown horizontally from the roof of a building 9.0m tall and lands 9.7m from the base. What was the ball's initial speed
A high-voltage transmission line with a resistance of 0.31 omegacap.gif/km carries a current of 1010 A. What is the power loss due to resistance in the line
A 11kg hammer strikes a nail at a velocity of 8.7m/s and comes to rest in a time interval of 7.4ms, What is the impulse of the given nail
An electron is initially at rest just outside a large copper surface that has a charge density of 1.04 10-6 C/m2. How far has the electron moved in 1.12 10-9 s if the field is uniform over this region
a 3 kg cylinder falls vertically from rest in a very tall, evacuated tube 20 m above the surface of the earth. what is the kinetic energy just before it hits the earth
sitting in a second-story apartment a physicist notices a ball moving straight upward just outside her window. the ball
Spacecraft have been sent to Mars in recent years. Mars is smaller than Earth and has correspondingly weaker surface gravity. What is the orbital period of a spacecraft in a low orbit near the surface of Mars
a solenoid had an inductance of l and carries a current of 15 a if the current goes from 15 a to 0 a in time fo 75 ms
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