Answer:
Option D. Car companies have developed hybrid cars.
Explanation:
Nowadays car companies have developed hybrid cars. In hybrid cars, the cars are moved by using electric energy instead of fossil fuels. Hybrid cars uses batteries which can be charged by electricity and this store electricity is used to run cars. These types of cars reduce carbondioxide emissions and decrease occurs in air pollution.
That is when extinction occurs. Hope I helped!
Answer:
An animal traveling at 3mm/h east increased his velocity to 5 mm/h east in one hour. What was the animal’s acceleration?
Acceleration= velocity/time
velocity=5mm= 0.005m
time= 1 hour= 60 seconds
A= 0.005/60
Acceleration= 0.000083m/s square
Explanation:
On way to test a mineral is to break it and see how many directions of Cleavage it has
Answer:
0.2Hz
Explanation:
The wavelength of a radiowave can be calculated this;
λ = v/f
Where;
λ = Wavelength (m)
v = speed (m/s)
f = frequency (Hz)
Based on the information provided in this question, λ = 1.5 x 10^9 meters, c = 3 × 10^8m/s, f = ?
Hence, using λ = v/f
f = v/λ
f = 3 × 10^8 ÷ 1.5 x 10^9
f = 2 × 10^(8-9)
f = 2 × 10^-1
f = 0.2Hz
