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A stone tied to the end of a string is whirled around in avertical circle of radius R. Find the critical speed below which the spring would become slack at the highest point.
What is the pressure at the bottom of a swimming pool which is 12ft deep and contains fresh water.
A 0.900-V potential difference is maintained across a 1.50-m length of tungsten wire that has a cross-sectional area of 0.600 mm2. What is the current in the wire.
Two radio-frequency point sources separated by 2.0 m are radiating in phase with ? = 1.00 m. find how many maxima it detects
Low-frequency vertical oscillations are one possible cause of motion sickness, with 0.20 hz having the strongest effect. How much time elapses between two waves hitting the ship
A rocket carrying a satellite is accelerating straight up from the earth's surface. At 1.10 s after liftoff, the rocket clears the top of its launch platform, Calculate the magnitude of the average velocity of the rocket
A sports utility vehicle has tires which are 110 cm in diameter. If the wheel is rotated through 30 revolutions, how far forward does a point on the tire travel
A car travels north at 28.9 m/s for 14.3 min. It then travels south at 40.1 m/s for 28.5 min. a) What is the total distance the car travels? b) What is the displacement of the car?
The froghopper, Philaenus spumarius, holds the world record for insect jumps. When leaping at an angle of 58.0^\circ above the horizontal, some of the tiny critters have reached a maximum height of 52.7cm above the level ground.
A sprinter of mass 72.8 kg runs at a constant speed of 10.8 m/s in a straight line. Find the extra force the sprinter must exert on the ground to round a curve of radius 10.4 m
An alpha particle (a He nucleus, containing two protons and two neutrons and having a mass of 6.52×10^?27 kg) traveling horizontally at 35.2 km/s enters a uniform, What effect does the magnetic field have on the speed of the particle
The model airplane in Figure 5.7 is flying at a speed of 13.2 m/s on a horizontal circle of radius 17.9 m. The mass of the plane is 1.18 kg. What is the net work done on the plane
A dive bomber has a velocity of 230 m/s at an angle theta below the horizontal. When the altitude of the aircraft is 2.15 km, it releases a bomb, Find the angle theta
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