Need help on these , thank you! Which of the following statements is true regarding waves...
Need help on these , thank you!
Which of the following statements is true regarding waves such as sound waves?
| A. |
If the amplitude of the wave is increased, the frequency of the wave is increased too. |
|
| B. |
If the wavelength of the wave is increased, the frequency of the wave is increase. |
|
| C. |
If the wavelength of the wave is increased, the frequency of the wave is decreased. |
|
| D. |
If the period of the wave is increased, the frequency of the wave is increased. |
| A. |
They do not have any friction brakes (like that of a typical car) since they have “regenerative” or “dynamic” brakes. |
|
| B. |
They are responsible for the emission of greenhouse gases since the electricity that charges them was produced by fossil fuel combustion. |
|
| C. |
The electric car produces no waste heat while it is operating. |
|
| D. |
Electric cars are 100% efficient. |
| A. |
Increase the profits of body shops. |
|
| B. |
Increase the distance over which the collision force acts. |
|
| C. |
Decrease the time at which the collision force acts. |
|
| D. |
None of the above are correct. |
Electric charge
|
can be subdivided indefinitely. |
||
|
occurs only in separate parcels of ±1.6 × 10-19 C. |
||
|
occurs only in separate parcels of ±1 C. |
||
|
occurs only in separate parcels whose value depends on the particle carrying the charge. |
-
Gravity is not
a fundamental force.
responsible for holding the moon in orbit around the earth.
responsible for holding atoms and molecules together.
active throughout the universe.
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