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.
Explanation:
Answer: False
Explanation: They can see it by karst topography!
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.
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.
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.
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