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2 years ago

Is there any terminal identification mark for rheostat as positive, negative?

1 answer:

7 0

Rheostats are pure resistances with a provision to vary the resistance connected in the circuit with a moving contact. Resistance do not have polarities

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A uniform metre rule of mass 10g is balanced on a knife edge placed at 45cm mark. Calculate the distance of a mass 25g from the

Verdich [7]

Answer:

The distance of a mass 25g from the pivot is 18cm

Explanation:

Given

$m_1 = 10g$

$d_1 = 45cm$

$m_2 = 25g$

Required

Distance of m2 from the pivot

To do this, we make use of:

$m_1 * d_1 = m_2 * d_2$ --- moments of the masses

So, we have:

$10 * 45= 25* d_2$

$450= 25* d_2$

Divide both sides by 25

$18= d_2$

Hence:

$d_2 = 18$

5 0

2 years ago

what evidence would you expect to find on the moon if it had been subjected to plate tectonics? (select all that apply.)

irina1246 [14]

Volcanoes and mountains are the evidences that show plate tectonics.

<h3 /><h3>What evidence would you expect to find on the Moon if the Moon had been subjected to plate tectonics? </h3>

The presence of volcanos and mountains are the evidences that provides information that the moon has plate tectonic. If there is no volcanoes and mountains on the moon then we can say that there is no plate tectonic on the moon.

So we can conclude that volcanoes and mountains are the evidences that show plate tectonics.

Learn more about tectonics here: brainly.com/question/2325633

#SPJ11

5 0

1 year ago

A 0.15 kg baseball is pushed with 100 N force. what will its acceleration be?

sammy [17]

Answer:

The acceleration of the ball is 666.67 m/s²

Explanation:

It is given that,

Mass of the baseball, m = 0.15 kg

Applied force to it, F = 100 N

We need to find the acceleration of the ball. It can be calculated using Newton's second law of motion as :

F = ma

$a=\dfrac{F}{m}$

$a=\dfrac{100\ N}{0.15\ kg}$

$a=666.67\ m/s^2$

So, the acceleration of the ball is 666.67 m/s². Hence, this is the required solution.

8 0

3 years ago

WAVES AND SOUND

lawyer [7]

Answer:

i think it is B

Explanation:

6 0

2 years ago

The resistivity of a certain semi-metal is 10-3 Ohm-cm. Suppose we would like to prepare a silicon wafer with the same resistivi

faltersainse [42]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The dopant density is ND ≈ 8.135*10¹² cm⁻³

Explanation:

The explanation is shown on the second , third ,fourth and fifth uploaded image

3 0

2 years ago