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Q. The plates of a parallel plate capacitor are separated by d = 2.8 cm. The potential of the negative plate is 0 V, and the potential halfway between the plates is +15 V. What is the electric field between plates (take the upward direction as the positive direction)? Be sure to include the proper + or - sign.
Q. Throughout a workout, the football players at State U. ran up the stadium stairs in 63 s. The stairs are 135 m long and inclined at an angle of 30°. If a typical player has a mass of 105 kg, compute approximately the average power output on the way up. Ignore friction and air resistance.
Use approximate calculations assuming constant current during the output pulse. Calculate the ampere-hour rating of the battery so it lasts for five years.
Two charged dust particles exert a force of 4.30×10-2 N on each other. What would be the force if they are moved so they are only one-sixth as far apart.
While standing on a bridge 45m above the ground, you drop a stone from rest. When the stone has fallen 4.90m, you throw a second stone straight down. What initial velocity should you give the second stone if they are both to reach the ground at th..
A severe thunderstorm dumped 2.4 in of rain in 30 min on the town of area 21 km2. What mass of water (in kg) fell on the town? One cubic meter of water has a mass of 103 kg.
Assume the masses described in the preceding problem are 1kg and 100kg in that order. Compare the accelerations while they are interchanged.
The satellite has an orbital period around the Earth that is the similar as that of the Moon, 27.3 days. How far away from the Earth must this satellite be placed.
What is resultant force
A 2.50 g bullet, traveling at a speed of 465 m/s, strikes the wooden block of a ballistic pendulum. The block has a mass of 275 g. What is the speed of the bullet/block combination immediately after collision.
express what would be the frequency of vibrations.
A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 60.0 degrees above the horizontal. The rocket is fired toward the ground 11.0-m high wall, which is located 27.0 m away. By how much does the rocket clear the top of the wa..
A car is driven east for a distance of 47 km, then north for 25 km, and then in a direction 29° east of north for 29 km. find (a) magnitude (in km) of car's total displacement from its starting point and (b) the angle (from east) of the car's total..
What is specific gravity of this other fluid
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