Answer:
Position at t= 4 seconds is 144 m
Explanation:
It is given that acceleration, a = 18 t, where t is the time.
We know that Velocity,
Substituting value of a,
Velocity,
We know that at t = 0, v = -12 m/s
So,
So velocity,
We also know that displacement,
Substituting value of v,
Displacement,
We know that at t = 0, particle is at origin, x =0.
So,
Displacement,
At t = 4 seconds
Position at t= 4 seconds is 144 m
Answer:
The frequency of the wave is 5 x 10⁹ Hz
Explanation:
Given;
wavelength of the radio wave, λ = 6.0 × 10⁻²m
radio wave is an example of electromagnetic wave, and electromagnetic waves travel with speed of light, which is equal to 3 x 10⁸ m/s².
Applying wave equation;
V = F λ
where;
V is the speed of the wave
F is the frequency of the wave
λ is the wavelength
Make F the subject of the formula
F = V / λ
F = (3 x 10⁸) / (6.0 × 10⁻²)
F = 5 x 10⁹ Hz
Therefore, the frequency of the wave is 5 x 10⁹ Hz
Answer: Use less water
only turn on lights when needed
electrical cars
less gas usage
Explanation:
Answer:
an apple falling off a tree
Explanation: