Physics, 30.07.2019 04:20 trinitieu66
An 80-kg quarterback jumps straight up in the air right before throwing a 0.43-kg football horizontally at 15 m/s . how fast will he be moving backward just after releasing the ball? modelthe interaction at study in this problem is the action of throwing the ball, performed by the quarterback while being off the ground. to apply conservation of momentum to this interaction, you will need to clearly define a system that is isolated or within which the impulse approximation can be applied. which of the following best describes why you can analyze the interaction described in this problem using conservation of momentum? a. the throwing action is quick enough that external forces may be ignored. b. there are no external forces acting on the system. c. external forces don't act on the system during the jump. d. conservation of momentum is always the best way to analyze motion.
Answers: 3
Physics, 21.06.2019 18:00
Which of the following changes to a pipe would increase the conductance by a factor of 12? 1.quadrupling the length and tripling the radius.2.reducing the length by a factor of and doubling the radius.3.tripling the length and reducing the radius by a factor of .4.reducing the length but a factor of and doubling the radius.
Answers: 3
Physics, 22.06.2019 06:30
What are similarities and differences between refraction, reflection, diffraction and absorption?
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Physics, 22.06.2019 18:00
The protons in a nucleus are approximately 2 β 10^β15 m apart. consider the case where the protons are a distance d = 1.93 β 10^β15 m apart. calculate the magnitude of the electric force (in n) between two protons at this distance.
Answers: 1
Physics, 22.06.2019 18:30
Suppose you plot the distance traveled by an object at various times and you discover that the graph is not a straight line. what does this indicate about the object's acceleration?
Answers: 3
An 80-kg quarterback jumps straight up in the air right before throwing a 0.43-kg football horizonta...
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