In DC motor, the split rings are made of
A) steel B) copper C) wood D) glass

Answers

Answer 1

Answer:

Answer:

B)Copper

Explanation:

The DC motor is provided with some devices or the parts to periodically change the direction of the current in the motor. way as that of the armature rotation. The split rings are made up of the copper and the spindle connected to it is made of carbon.

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In a grassland ecosystem, if the pollution of eagles suddenly decreased, what will most likely be the effect on the rest of the ecosystem.A. The ecosystem will become overpopulated with snakes. B. There will be a decrease in the population of snakes in the ecosystem. C. The nutrition of the soil in the ecosystem will decrease. D. More type of plants will begin growing in the ecosystem.

What are two safety precautions to take while exercising in hot weather

Answers

Drink lots of water, take breaks in the shade

Without being able to look into the earth , a scientist would not be able to determine if this region has karst topography True or False

Answers

Without being able to look into the Earth, a scientist would not be able to determine if this region has karst topography, is a false statement

Explanation:

Karst topography can be observed by looking into the earth’s external surface structures like barren rocky grounds, caves, underground rivers, sinkholes and other karst landscapes.
Karst topography results due to erosion of limestone by the excavation of underground water. When rainwater erodes the soft rocks like limestone it begins to slowly dissolve in water.
Over repeated erosion, only the rocky cliffs remain on the surface. When an underground river emerges from sinkholes in a karst landscape, the rocky remains form caves.
So by studying these external surfaces itself, the scientist can determine if a region has karst topography

Answer: False

Explanation: They can see it by karst topography!

Does only space have gravity?

Answers

Gravity causes every object to pull every other object toward it. Some people think that there is no gravity in space. In fact, a small amount of gravity can be found everywhere in space. Gravity is what holds the moon in orbit around Earth.

What are the four most common gases in dry air?

Answers

Nitrogen and oxygen are by far the most common.
Hope this helps

Wright true or false:1.A baseball has more momentum than a tennis ball traveling at the same speed.
2. A light ball has more inertia than a heavy ball
3. The less momentum a bowling ball has, the easier it is for that ball to knock down pins.
4. A heavy bowling ball is easy to get rolling because of its inertia.

Answers

true false false true

Final answer:

A baseball has more momentum than a tennis ball traveling at the same speed. A light ball has less inertia than a heavy ball. The less momentum a bowling ball has, the easier it is for that ball to knock down pins. A heavy bowling ball is easy to get rolling because of its inertia.

Explanation:

1. True. Momentum is the product of an object's mass and velocity. Since a baseball has more mass than a tennis ball while traveling at the same speed, it has more momentum.

2. False. Inertia is the resistance of an object to changes in its motion. It depends on an object's mass. So, a heavy ball has more inertia than a light ball.

3. False. The more momentum a bowling ball has, the easier it is for it to knock down pins. Momentum is directly proportional to the force at which the ball hits the pins.

4. True. Inertia is the tendency of an object to resist changes in its motion. A heavy bowling ball has more inertia, making it easier to get rolling.