Answer:
3 x 10⁻⁴m
Explanation:
Given parameters:
Speed of light = 300000km/s
Frequency = 1000gigahz = 1000 x 10⁹Hz
Unknown:
Wavelength = ?
Solution:
To solve this problem, we use the expression below:
V = F ∧
V is the speed
F is the frequency
∧ is the wavelength
300000 = 1000 x 10⁹ x ∧
Wavelength = 3 x 10⁻⁷km = 3 x 10⁻⁴m
Answer:
d. boost frequencies below 80 Hz.
Explanation:
Low frequency sound appear to be soothing to mind. It is called bass . bass instruments play low frequency notes. But to produce low frequency note , the size of musical instruments have to be increased which increases its cost.
Any instrument which boosts low frequency are therefore costly . They are accompanied by air amplifier.
Answer:
milligrams
explanation:
kilograms are too big
<em>Hope this helps :)</em>
The source and the observer are moving towards each other. The observer is moving toward the source. The source is moving away from the observer
Answer:
by preventing flooding, creating reservoirs, and providing water for irrigation
Dams and waterways store and provide water for irrigation so farmers can use the water for growing crops. This idea goes way back into history. Irrigation is an important part of using water. In areas where water and rain are not abundant (like the desert), irrigation canals from rivers and dams are used to carry water.
Dams help in preventing floods. They catch extra water so that it doesn’t run wild downstream. Dam operators can let water out through the dam when needed.
