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3 years ago

When current flows through an electric motor, the electromagnet rotates. true or false?

Physics

1 answer:

Arte-miy333 [17]3 years ago

6 0

Answer: true

Explanation:

It helping it rotate

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Hoover Dam on the Colorado River is the highest dam in the United States at 221m, with a power output of 680 MW. The dam generat

Phantasy [73]

Answer:

Power = 9.75 ×10^8 $\frac{kgm^2}{s^3}$

Explanation:

Power is rate of change of energy.
Here gravitational energy is transferred to kinetic energy of water at a definite rate.

For one second 650m^3 of water flows out down to 150m oh depth.

So, the energy at a height of 150m is transformed to kinetic energy.

for a second,

650m^3 of water flows down ⇒ (1000kg/m^3 × 650m^3) = 6.5×10^5kg of warer flos down.

The total gravitational potential energy stored in water is

= mass of water × height× gravity

= 6.5 ×10^5 × 150 × 10 = 9.75 ×10^8 $\frac{kgm^2}{s^2}$

As it is transformed in a second it is also equal to Power.

4 0

3 years ago

Read 2 more answers

Johnny walked to the other side of his building using the following steps: 10 meters North, 20 meters to the West, 40 meters Sou

nataly862011 [7]

Answer:

Distance traveled = 70 meters

Displacement = 36.06 meters

Explanation:

Let north be positive Y and east be positive X

10 meters north, displacement = 10 j meters

20 meters west, displacement = -20 i meters

40 meters south, displacement = -40 j meters

Total displacement = (10 j - 20 i – 40 j) meters = (- 20 i - 30 j) meters

Magnitude of displacement = $\sqrt{20^2+30^2}=\sqrt{1300}= 36.06 meters$

Distance traveled = 10+20+40 = 70 meters

6 0

3 years ago

Will give brainliest! how does an engineer use physical science?

pentagon [3]

Answer: gravity, circuits

Explanation:

3 0

3 years ago

What waves have high amplitudes

Olegator [25]

-- loud sounds

-- bright lights

-- strong radio signals

-- Slinkies that can pinch you painfully

-- a tsunami in the ocean

-- earthquakes above Richter 5 or 6

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3 years ago

A device that converts electrical energy into kinetic energy to turn an axle?

Advocard [28]

A motor is the devise

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3 years ago