Answer:
6.75m/s
Explanation:
using the second equation of motion, the time is calculated.
and with the formula a= (v - u)/t
where a is acceleration but in this case it's deceleration (and should be negated as you solve it ) .
v is final velocity
u is initial velocity
t is time taken
Answer:An incandescent light bulb gives only energy of the system in the form of heat. ... The roof of a house is stable but it receives energy from the surroundings and transfers energy through it towards lower temperature side which includes no mass transfer. So, it is best considered as closed system.
Explanation:
Answer:
The most abundant gas in Earth’s atmosphere is nitrogen, followed by oxygen, which is needed to burn wood and fuel. The third-most abundant gas is argon. The amount of carbon dioxide in the atmosphere is very small, making up just 0.33% of the atmosphere, but it is very important because plants use it to make simple sugars. Another important gas is water vapor, which condenses around small particles in the atmosphere to form clouds and then rain.
Explanation:
The magnitude of the net force could be anything from 89N to 341N , and it could be acting in ANY direction.
To solve both mysteries we need to know the directions of the original two forces.
Answer:
The speed of the wind is 70.7 units.
Explanation:
The velocity of the wind is equal to plane's velocity before the wind minus its velocity after the wind:
Now, the speed of the wind is the magnitude of 
:
which is the speed of the wind.
<em>P.S: No units are given for speed because no units were provided in the question.</em>
