3 years ago

A car, starting from rest, travels 420 m. If the car takes 9.0 s

Physics

1 answer:

natka813 [3]3 years ago

8 0

Yea cs no lol B and B and B and

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A reconnaissance plane flies 545 km away from

Nikolay [14]

Answer:

681.6/ms

Explanation:

A reconnaissance plane flies 545 km away from its base at 568 m/s. then flies back to its base at 852 m/s.

What is its average speed?

Answer in its of m/s

Avg speed of the round trip is

2*568*852/(568+852)= 681.6/ms

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2 years ago

A 6.89-nC charge is located 1.76 m from a 4.10-nC point charge. (a) Find the magnitude of the electrostatic force that one charg

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Answer: a) 8.2 * 10^-8 N or 82 nN and b) is repulsive

Explanation: To solve this problem we have to use the Coulomb force for two point charged, it is given by:

$F=\frac{k*q1*q2}{d^{2}}$

Replacing the dat we obtain F=82 nN.

The force is repulsive because the points charged have the same sign.

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2 years ago

What is the period of a wave with a frequency of 0.75 Hz?

Wewaii [24]

Answer:

Period = 1.33 seconds

Explanation:

Period = 1/0.75

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2 years ago

Two people are sitting on wheeled chairs 1 metre apart. Person A is holding a 2kg ball. Person A throws the ball to Person. What

zhuklara [117]

Answer:

B - Person A's chair rolls backwards.

Explanation:

This can be seen simply through the Conservation of Momentum. When the ball is thrown to be, the ball's momentum(+m) is transfererd to B, so B's chair moves forward(think about it - it makes sense, doesn't it?), meaning A's chair moves backwards.

So, B.

EXTRA TIP: Try drawing a diagram to help you!

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2 years ago

Listed in the Item Bank are some important labels for sections of the image below. To find out more information about labels, so

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Answer:

to the left the first answer can be "Consumer" and under it can go "plant"

to the right the first answer on the top can be "Carnivore" under it can go "Herbivore" and under it can go "Producer"

I just had this question and its right

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3 years ago