Energy acquired by consuming a calorie donut
If a person radiates about 65 W of power at room temperature, how long does it take for a person to radiate away the energy acquired by consuming a 230 Calorie donut?
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In a tennis serve, a 7.8×10-2 kg ball can be accelerated from rest to 36 over a distance of 0.76 m/s. Find the magnitude of the average force exerted by the racket on the ball during the serve.
Determine the fractional decrease in the rod's length using the formula above, where L0,Silver and L0,Gold are the initial lengths of the silver and gold rods. (See Table 12.1 for appropriate constants.)
Water flowing out of a 16.0 mm-diameter faucet fills a 1.50 L bottle in 7.00 s. At what distance below the faucet has the water stream narrowed to 10 mm diameter?
An elevator and its load have a combined mass of 1400 kg. Find the tension in the supporting cable when the elevator, originally moving downward at 12 m/s, is brought to rest with constant acceleration in a distance of 47 m.
The charge is uniformly distributed within the volume of each sphere. What is the magnitude of the electric field midway between the spheres?
The distance from one hand to the other is 1.5 {rm m}. Biometric measurements indicate that each hand typically makes up about 1.25 % of body weight.
Two people are talking at a distance of 3.0 m from where you are and you measure the sound intensity as 1.1×10-7 W/m2. Another student is 4.0 m away from the talkers. What sound intensity does the other student measure?
A proton is fixed in place. An electron is released from rest and allowed to collide with the proton. Then the roles of the proton and electron are interchanged, and the same experiment is repeated. Which is traveling faster when the collision occ
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