Answer:
223.61 km
Explanation:
Speed of car traveling south = 100 km/h
Speed of car traveling west = 50 km/h
Time each car travels = 2 hours
Distance = Speed×Time
Distance covered by car traveling south = 100×2 = 200 km
Distance covered by car traveling west = 50×2 = 100 km
Consider the distance covered by car traveling south as the base of a triangle and the distance covered by car traveling west as the height of a triangle
Distance between them after 2 hours would be the hypotenuse of the triangle
Pythagoras theorem
Hypotenuse = √(Base²+Height²)
⇒Hypotenuse = √(200²+100²)
⇒Hypotenuse = 223.61 km
So, they are 223.61 km apart two hours later.
The answer is True
Burning fossil fuels DOES causes more air pollution than soil erosion, dust storms, and forest fires
The answer is B. The hotter rock is less dense so rises. The cooler rock is more dense so sinks.
Answer:
6.34 x 19^14 Hz
Explanation:
Wavelength, λ = 473 nm = 473 x 10^-9 m
the relation between the frequency and the wavelength is given by
v = f x λ
where, v is the velocity of light in vacuum which is equal to 3 x 10^8 m/s.
So, f = v / λ
f = ( 3 x 10^8) / ( 473 x 10^-9)
f = 6.34 x 19^14 Hz