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Author Question: An unfueled 1000-kg experimental rocket sled on level frictionless rails is loaded with 50 kg of ... (Read 777 times)

mydiamond

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on: Jul 28, 2018
An unfueled 1000-kg experimental rocket sled on level frictionless rails is loaded with 50 kg of propellant. It exhausts the propellant in a 20 s burn.. If the rocket, initially at rest, moves at 160 m/s after the burn, what impulse is experienced by the rocket sled?
 a. 1.1  105 kgm/s
  c. 1.5  105 kgm/s
  b. 1.6  105 kgm/s
  d. 1.9  105 kgm/s

Question 2

Two point charges, separated by 1.5 cm, have charge values of +2.0 and -4.0 C, respectively. Suppose we determine that 10 field lines radiate out from the +2.0-C charge. If so, what might be inferred about the -4.0 mC charge with respect to field lines?
 a. 40 radiate in
  c. 5 radiate out
  b. 20 radiate out
  d. 20 radiate in


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mk6555

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Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

D


mydiamond

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Reply #2 on: Jul 28, 2018
TY


mk6555

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Reply #3 on: Jul 28, 2018
You're welcome


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