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The electric field has been measured to be vertically upward everywhere on the surface of a box 20 cm long, 4 cm high, and 3 cm deep, shown in the figure. All over the bottom of the box E1 = 1600 V/m, all over the sides E2 = 950 V/m, and all over the top E3 = 400 V/m. What is the amount of charge enclosed by the box? Use the accurate value ?0 = 8.85 10-12 C2/N·m2. C
An electron is in the ground state of an infinite square well. The energy of the ground state is E1 = 1.11 eV. What is the width of the square well
A vessel at rest at the origin of an xy coordinate system explodes into three pieces. Just after the explosion, one piece, of mass m, moves with velocity, what is the magnitude of the velocity of the third piece
An 8.0-kg block is set moving with an initial speed of 6.0 m/s on a rough horizontal surface. how far does the block travel before it stops
If the coefficient of static friction is 0.951, illustrate what is the maximum speed that the car can take without skidding?
A sample contains 8.90×104 radioactive nuclei. In a time of 5 minutes, 1.90×103 of the nuclei decay. Evaluate the half life of the sample
A professor's office door is 0.80 wide, 3.0 high, and 5.0 thick; has the mass of 25; and pivots on frictionless hinges. A "door closer" is attached to the door and the top of door frame.
A piano wire with mass 2.65g and length 79.0cm is stretched with a tension of 34.0N. Calculate the average power carried by the wave
An air-filled parallel plate capacitor with a plate spacing of 1.20 cm has a capacitance of 4.30, Calculate the dielectric constant of the inserted material
A rotating wheel requires 6.00 s to rotate 30.0 revolutions. What is the constant angular acceleration (in rad/s) of the wheel
The crew of a rocket that is moving away from the earth launches an escape pod, which they measure to be 55 m long. What is the length of the escape pod as determined by an observer on earth
question1the index of refraction for red light in water is 1.331 and that for blue light is 1.340. if a ray of white
A 2110-kg test rocket is launched vertically from the launch pad. Its fuel (of negligible mass) provides a thrust force so that its vertical velocity as a function of time is given by v(t)=At+Bt^2, What was the initial thrust due to the fuel
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