All categories

3 years ago

Help meeeeeeeeeeeewhat is the rheostat and what its ruleeee??

Physics

1 answer:

oee [108]3 years ago

6 0

Answer:

A rheostat is a variable resistor which is used to control current. They are able to vary the resistance in a circuit without interruption. ... It uses only two connections, even when 3 terminals (as in a potentiometer) are present.

Explanation:

You might be interested in

A light ray in air hits piece of quartz at a 39.0 deg angle. Inside the quartz, the light slows down to 2.06*10^8 m/s. At what a

Naddika [18.5K]

Answer:

Angle of light at which it will travel in the quartz is given as

$\theta = 25.6^o$

Explanation:

As we know that the refractive index of a medium is the ratio of speed of light in air and speed of light in the medium

So we will have

$\mu = \frac{c}{v}$

here we have

$\mu = \frac{3 \times 10^8}{2.06 \times 10^8}$

$\mu = 1.456$

now by Snell's law we have

$n_1 sin\theta_1 = n_2 sin\theta_2$

$1 sin39 = 1.456 sin\theta$

$\theta = 25.6^o$

3 0

3 years ago

“Why can I sometimes see the moon during the day?“Why can I sometimes see the moon during the day?

asambeis [7]

Answer:

its bc of the way earth spins

Explanation:

4 0

3 years ago

You are planning a trip to the beach 250 miles away. How long will it take if you think you can average 55 miles per hour?

Advocard [28]

Answer: that’s a good question

Explanation:

3 0

4 years ago

Katelyn (55 kg) is practicing a drop jump in the biomechanics lab. She steps off a plyometrics box, lands on the force plate, an

suter [353]

Answer:

J = 357.5 kg*m/s

Explanation:

The impulse exerted on Katelyn when she was on the force plate, is equal to the change in her momentum, according to Newton's 2nd Law.
Assuming as the positive direction the upward direction (coincident with the positive y-axis) we can express the initial momentum as follows:

$p_{o} = m*v_{o} = 55 kg * (-3.0 m/s) (1)$

By the same token, the final momentum is as follows:

$p_{f} = m*v_{f} = 55 kg * (3.5 m/s) (2)$

As we have already said, the impulse J is just equal to the change in momentum, i.e., the difference between (2) and (1):

$J = p_{f} - p_{o} = m* (v_{f} -v_{o}) = 55 kg* (3.5m/s- (-3.0m/s)) = 357.5 kg*m/s (3)$

5 0

3 years ago

Please hurry please

Ghella [55]

Answer:

0.765m

Explanation:

gravitational potential energy GPE = mass * acceleration due to gravity * height

Given

GPE = 30Joules

Mass m = 4kg

acceleration = 9.8m/s²

Required

Height h

From the formula

h = GPE/mg

h = 30/4(9.8)

h = 30/39.2

h = 0.765m\

Hence the height of the counter is 0.765m

4 0

3 years ago

Help meeeeeeeeeeeewhat is the rheostat and what its ruleeee??​

Help meeeeeeeeeeeewhat is the rheostat and what its ruleeee??