Physics, 04.02.2020 17:48 cesarcastellan9
Apitcher throws a 0.144-kg baseball toward the batter so that it crosses home plate horizontally and has a speed of 42 m/s just before it makes contact with the bat. the batter then hits the ball straight back at the pitcher with a speed of 47 m/s. assume the ball travels along the same line leaving the bat as it followed before contacting the bat. (a) what is the magnitude of the impulse delivered by the bat to the baseball? 12.816 n · s (b) if the ball is in contact with the bat for 0.0046 s, what is the magnitude of the average force exerted by the bat on the ball? kn (c) how does your answer to part (b) compare to the weight of the ball? fav mg =
Answers: 2
Physics, 22.06.2019 03:30
The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.
Answers: 3
Physics, 22.06.2019 18:10
A200-n force is applied to the foot-operated air pump. the return spring s exerts a 2.6-n·m moment on member oba for this position. determine the corresponding compression force c in the cylinder bd. if the diameter of the piston in the cylinder is 40 mm, estimate the air pressure generated for these conditions. state any assumptions. enter a positive number for the compression force c.
Answers: 2
Physics, 22.06.2019 18:30
Daughter element the new element produced along with a decay particle in a nuclear transmutation 2. half-life the substance that decays in a nuclear transmutation 3. parent element the change of one chemical element into another by nuclear decay or radioactive bombardment 4. transmutation the time required for the decay of one-half of the atoms in a sample of radioactive material
Answers: 2
Physics, 23.06.2019 02:00
How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is 4.57×10−21 newtons?
Answers: 2
Apitcher throws a 0.144-kg baseball toward the batter so that it crosses home plate horizontally and...
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