All categories

3 years ago

A person swims to the other end of a 20m long pool and back. What is their displacement?

Physics

1 answer:

mafiozo [28]3 years ago

3 0

Answer:

Zero

Explanation:

It is given that,

A person swims to the other end of a 20m long pool and back.

We need to find his displacement.

Displacement = shortest path covered

He reaches at the same position as from where he has started. It means the shortest path covered is equal to 0 i.e. his displacement is zero.

You might be interested in

Two metal spheres are suspended from strings. The

nikdorinn [45]

Answer:

B. A repulsive force of 8.0*10^3 N.

Explanation:

As we know by Coulomb's law that the electrostatic force between two charges is given as

$F = \frac{kq_1q_2}{r^2}$

here we know that

$q_1 = -2 \times 10^2 C$

$q_2 = -4 \times 10^{-8} C$

r = 3.0 m

now we have

$F = \frac{(9 \times 10^9)(2 \times 10^2)(4\times 10^{-8})}{3^2}$

$F = 8000 N$

since both charges are similar charges so they will repel each other by the force we calculated above so correct answer will be

B. A repulsive force of 8.0*10^3 N.

3 0

3 years ago

A spaceship is traveling toward the earth from the space colony on Asteroid 1040A. The ship is at the halfway point of the trip,

gladu [14]

Answer:

The message (signal) coming from the earth was sent first.

Explanation:

The radio messages reach Mars simultaneously, because the distance from Earth to Mars and that of from Mars to Asteroid is same. But the passenger in the spaceship is moving relative to Mars towards Earth and hence, the message from Earth reaches first.

According to passenger frame, the message (signal) coming from the Earth was sent first compared to message coming from Asteroid.

7 0

2 years ago

In what state is gold at a 800°c

Scilla [17]

Gold would be a solid

5 0

2 years ago

What is the net force acting on a jet that has a mass of 130,000kg and it accelerates at a rate of 6m/s as it takes off

katrin [286]

???????????????????????????????

5 0

3 years ago

What is laplace law???????

cestrela7 [59]

${\texttt{\huge{\red{ANSWER :-}}}}$

<h3>LAPLACE LAW :-</h3>

Laplace's law for the gauge pressure inside a cylindrical membrane is given by

Where

γ => surface tension

r => the radius of the cylinder

Note : there is an inverse relation between the pressure and the radius.

8 0

2 years ago