All categories

3 years ago

The current in a resistor is 2.0 A, and its power is 78 W. What is the voltage?

Physics

1 answer:

bazaltina [42]3 years ago

6 0

Answer:

39 volts

Explanation:

Use the equation $P=VI$

$78=V(2)$

$V=39$

You might be interested in

A common carnival ride, called a gravitron, is a large r = 11 m cylinder in which people stand against the outer wall. the cylin

Elena-2011 [213]

Answer:

The minimum speed is 14.53 m/s.

Explanation:

Given that,

r = 11 m

Friction coefficient = 0.51

Suppose we need to find the minimum speed, that the cylinder must make a person move at to ensure they will stick to the wall

When frictional force becomes equal to or greater than the weight of person

Then, he sticks to the wall

We need to calculate the minimum speed

Using formula for speed

$f_{s}=\mu N\geq mg$

Where, $N =\dfrac{mv^2}{r}$

$\mu\times\dfrac{mv^2}{r}\gep mg$

$v^2\geq\dfrac{gr}{\mu}$

Put the value into the formula

$v=\sqrt{\dfrac{9.8\times11}{0.51}}$

$v=14.53\ m/s$

Hence, The minimum speed is 14.53 m/s.

8 0

3 years ago

The electric field direction is defined by the direction of the force felt by (select one of the following answers):A. A negativ

steposvetlana [31]

Answer:

Explanation:

The formula for the electric field is Force (N)/charge(Coulombs). The electric field direction is defined by the direction of the force felt by a positive charge.

4 0

3 years ago

PLSSS HELP MEEEE

vekshin1

Answer:

Cu2+

Explanation:

7 0

3 years ago

Read 2 more answers

Changes of state

Mrrafil [7]

Answer:

Option A

Explanation:

At segment T-U, the substance changes from a liquid to a gas and does not change temperature.

The reason is because latent heat of vaporisation allows for the absorption of heat in the change of state and temperature remains constant until it has fully changed state.

4 0

2 years ago

Read 2 more answers

Which phrase describes the thermal energy of a sample of matter?

fiasKO [112]

Answer:

where are the phrase's?

5 0

3 years ago