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A computer tape moves over two drums at a constant speed v0. Knowing that the normal component of the acceleration of the portion of tape in contact with drum B is 350 ft/s2, determine (a) the speed v0, (b) the normal component of the acceleration of the portion of tape in contact with drum A.
The parallel metal plate of a capacitor is seperated by a distance of 0.5cm and is connected to a 90v battery. Find an electric field between them and the surface charge density.
he beaker has a mass 15 grams when its empty the beaker plus the liquid has a mass of 38 grams. the liquid has a volume
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
When the afternoon Sun reaches an angle of 27.0° above the horizon, sunlight ceases to illuminate the bottom of the tank. Evaluate how deep is the tank?
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. What is the net charge of all these electrons
The intensity level produced by a jet airplane at a certain location is 163 dB. Calculate the intensity of the sound wave generated by the jet at the given location.
River Pascal with a volume flow rate of 6.1×105L/s joins with River Archimedes, which carries 1.15×106L/s , What is the speed of the water in the Bernoulli River
a crane is lifting a 500 kg payload straight up at a constant speed of 0.7 m/s. What is the power output of the crane
Lithium, beryllium, and mercury have work functions of 2.30eV,3.90eV, and 4.50eV respectively. Find the maximum kinetic enery for the photoelectrons in each case
Your cell phone battery states that it has a capacity of 1200mAh. That means it can provide constant current supply of 1200mA for 1 hour (or 3600 sec), Your battery provides a constant voltage of 3.7V. What is the energy in Joules stored in the bat..
A student drops a lit firecracker off the roof of abuilding with an initial velocity vo=0. She hearsit explode 10s later. The speed of sound is 330. What is its speed when it exploded
A bird flies 3.0 km due west and then 2.0 km due north. Another bird flies 2.0 km due west and 2.0 km due north. What is the angle between the net displacement vectors of the two birds
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