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Albert applies a 10 N force over a distance of 2 m in the same direction as the force for 5 seconds. Bob applies a 5 N force over a distance of 4 meters in the same direction of the force for 1 minute. Which of them does the most work?
A 60-kg skier starts from rest from the top of a 50-m high slope. If the work done by friction is -6.0 Af- 103 J, what is the speed of the skier on reaching the bottom of the slope?
An object slides down a frictionless inclined plane. At the bottom, it has a speed of 9.80 m/s. What is the vertical height of the plane?
At what rate is a 60.0-kg boy using energy when he runs up a flight of stairs 10.0-m high, in 8.00 s?
an astronaut is connected to her spacecraft by a 29-m-long tether cord as she and the spacecraft orbit earth in a
What is the distance between the sound waves you cause? If you hear the first echo after 5.81 s, what is the distance between you and the point where your voice hit a mountain?
Two 10 cm-diameter charged thin rings face each other, 20 cm apart. The left ring is charged to 20 nC and the right ring is charged to +20 nC. What is the electric field.
q1. a force does 150 j of work when it acts on a moving object and its direction is in the identical direction as the
A child has a temperature of 101F. If her total skin area is 18 m2, find the energy loss per second due to radiation, assuming the emissivity is 1. Assume the room temperature is 70F. The Stephan-Boltzmann constant is 5.6696 ×10^8 W/m2*K4.
A step-down transformer has a turns ratio of 1:10, and its primary is connected across the terminals of a standard 120-V wall socket
If 640-nm light falls on a slit 0.0525mm wide, what is the angular width of the central diffraction peak
A 75 kg parachutist descends through a vertical height of 310 m with constant speed. Find the increase in entropy produced by the parachutist, assuming the air temperature is 21°C.
A beam consisting of 8.22x10^16 electrons/sec passes through a region of vacuum. A) What magnetic field would be measured 1.50cm away from the center of the beam?
A 2600 kg truck traveling north at 38 km/h turns east and accelerates to 52 km/h. What is the change in the truck's kinetic energy? What is the magnitude of the change in the linear momentum of the truck?
predict how to changing the variables may effect the distance traveled or the speed of the race car.
The weight of a metal bracelet is measured to be 0.100 Newton in air and 0.092 Newton when immersed in water. Calculate its density
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