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It has been claimed that an insect called the froghopper (Philaenus spumarius) is the best jumper in the animal kingdom. How long did it take to reach that velocity
It's nighttime, and you've dropped your goggles into a swimming pool that is 4.5m deep. How far are the goggles from the edge of the pool
The centers of a 14kg lead ball and a 110g lead ball are separated by 8.0cm. What gravitational force does each exert on the other
A certain freely falling object, released from rest, requires 1.90 s to travel the last 36.5 m before it hits the ground. Find the total distance the object travels during the fall
A laser emits a narrow beam of light. The radius of the beam is 8.5 mm, and the power is 1.7 mW. What is the intensity of the laser beam
The electron beam inside a television picture tube is 0.40mm in diameter and carries a current of 50uA. How many electrons strike the screen each second
A 6.0 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 2.7 m/s2, find the force exerted by the rope on the bucket
A 26 g bullet moving a horizontal velocity of 370 m/s comes to a stop 9.3 cm within a solid wall. What is the change in the bullet's mechanical energy
A car with mass of 1000.0 kg accelerates from 0 m/s to 40.0 m/s in 12.0 s. Ignore air resistance. What is the average mechanical power output of the engine
A juggler on stilts throws a ball straight up, from a height of 2.5cm. It reaches a height of 3.5m, and then falls back to the ground. What is the impact velocity when it hits the ground
A bicycle wheel, 65 cm across, is half buried in dirt, standing on edge. What was the beetle's average velocity and speed from the time it started climbing until it hit the ground
ject located at the origin and having mass M explodes into three pieces having masses M/6, M/3, and M/2. What are the velocity components of the third piece
A 1200-kg car is being unloaded by a winch. At the moment shown in figure 9-46, the gearbox shaft of the winch breaks, and the car falls from rest. Find the speed of the car as it hits the water
A particle of 8 kg with a veloctiy of 40 m/s hits a 40 kg particle that is at rest. The collision is elastic. What are the final velocities of the particles
An unknown resistor is connected between the terminals of a 5.5 V battery. At what rate is energy now dissipated
A 120 V potential difference is applied to a space heater whose resistance is 19 ? when hot. At what rate is electrical energy transferred to heat
A car owner forgets to turn off the headlights of his car while it is parked in his garage. how long will it take the battery to completely discharge
A farmer throws a sack of wheat vertically downward with an initial speed of 12 m/s from the roof of a mill, 30.0 m above the ground. What is the speed of the sack at impact
A straight wire segment 4 m long makes an angle of 30° with a uniform magnetic field of 0.37 T. Find the magnitude of the force on the wire
A trunk of mass m = 1.800 kg is pushed a distance d = 185 cm up an incline with an angle of inclination theta = 25.0 ° by a constant horizontal force P = 300. N, Calculate the work done on the t
Three identical metal spheres are charged so that sphere A has a charge of 220 ?C, sphere B has a charge of -370 ?C, What is the final charge on each sphere
If the current through the inductor (L = 25.1 mH) at 351 Hz has an amplitude of 45 mA, what is the rms value of the AC voltage
Heat flows into an ideal gas at a constant volume. The pressure increases from 1.5 atm to 5.5 atm. What is the total change in internal energy
A horse pulls a cart with a force of 61 lb at an angle of 25° above the horizontal and moves along at a speed of 8.5 mi/h. What is the average power (in horsepower, hp) of the force
An ideal gas expands at a constant total pressure of 2.5 atm from 3.45 L to 6.70 L. calculate the total heat flow into the gas