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Coils rotating in a magnetic field are often used to measure unknown magnetic fields. As an example, consider a coil of diameter 2.00 cm with 72.0 turns that is rotated about an axis perpendicular t
A motorist traveling at 13 m/s encounters a deer in the road 47 m ahead. If the maximum acceleration the vehicle's brakes are capable of is -6 m/s2, what is the maximum reaction time of the motorist
A car is traveling 23 m/s when the driver sees a child standing in the road. He takes 0.8 s to react, then steps on the brakes and slows at 6.0 m/s2. How far does the car go before it stops?
A projectile is launched from a cannon at ground level at an angle of 62.0 degrees elevation and has a muzzle velocity of 481 m/s. How many seconds after it is fired does it reach max height?
Throughout the problem, use = 8.85×10-12 .The dielectric plate is now slowly pulled out of the capacitor, which remains connected to the battery. Find the energy of the capacitor at the moment
A small motor runs a lift that raises a load of bricks weighing 670 N to a height of 14 m in 25 s. Assuming that the bricks are lifted with constant speed, what is the minimum power the motor must p
Solar energy is incident on the pond at an average rate of 400 . If the water absorbs all the solar energy and does not exchange energy with its surroundings, how many hours will it take to warm fro
The cliff is 25.0 m above the ocean. Find the car's position horizontal relative to the cliff when the car lands in the ocean, and the length of time the car is in the air.
Suppose two bees, each with a charge of 93.0 , are separated by a distance of 1.05 . Treating the bees as point charges, find the magnitude of the electrostatic force experienced by the bees.
The two blocks are connected by a massless rope that passes over a pulley. The pulley is 17 cmin diameter and has a mass of 2.0 kg. As the pulley turns, friction at the axle exerts a torque of magni
Determine the stopping distances for an automobile with an initial speed of 95 km/h and human reaction time of 1.0 s : (a) for an acceleration a = -4.7 m/s^2 , (b) for = -7.2 m/s^2.
An athlete at the gym holds a 2.6 kg steel ball in his hand. His arm is 78 cm long and has a mass of 4.0 kg. What is the magnitude of the torque about his shoulder if he holds his arm in each of the
An ocean liner leaves New York City and travels 19.0° north of east for 264 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship
A train 350 m long is moving on a straight track with a speed of 84.3 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 16.4 km/h. Assu
A potter's wheel having a radius 0.50 m and a moment of inertia 11.7 kg·m2 is rotating freely at 53 rev/min. The potter can stop the wheel in 7.0 s by pressing a wet rag against the rim and e
A car travels north at 29.1 m/s for 13.1 min. It then travels south at 44.5 m/s for 20.9 min. What is the total distance the car travels?
There is a uniform magnetic field present, given by B=0.003i + 0.004j + 0.002k, where i, j, k are the unit vectors along the cartesian coordinate axes') in units of Tesla. Calculate the y-component
A space shuttle is launched from rest. It takes 8.00 s to reach 162 km/h , and at the end of the first 1.00 min its speed is 1620 km/h. What is the average acceleration (in m/s^2) of the shuttle dur
A particle confined to motion along the x axis moves with constant acceleration from x = 2.0 m to x = 8.0 m during a 2.5-s time interval. The velocity component of the particle at x = 8.0 m is 2.8 m
An electric motor rotating a workshop grinding wheel at a rate of 227 rev/min is switched off. Assume constant angular deceleration of magnitude 2.72 rad/s2. Through how many revolutions does the w
A house is 60.0 ft long and 25 ft wide, and has 8.0 ft high ceilings. What is the volume of the interior of the house in cubic meters and cubic centimeters?
What increase of pressure is required to change the volume of a sample of water by 0.792%? The bulk modulus is 2.1 × 10^9 Pa. Answer in units of Pa. Round to three decimal places.
A car traveling 80 km/h slows down at a constant 0.50 m/s^2 just by "letting up on the gas." Calculate the distance the car coasts before it stops in meters.
A 2400 kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 3.00 m before coming into contact with the top of the beam, and it drives the beam 13.0 cm farther into
A long straight metal wire of radius r1= 3.30E-2 m is surrounded by a metalic cylindrical shell of inner radius r2= 1.39E-1 m and outter radius r3= 1.84E-1 m. The axes of the wire and the cylindric