"<span>In physics and mathematics, any quantity with both a magnitude and a direction" </span>
Answer:
1
Explanation:
The car's acceleration must be equals to or less than the car's velocity, cause of the change in velocity.
Answer:
80%
Explanation:
Thermal efficiency is a measure of the extent to which a heat engine is able to convert to other form. It is measure in percentage.
Thermal efficiency =
× 100%
Where
is the input energy and
is the output energy.
Given that:
= 2400 J and
= 3000 J, therefore:
Thermal efficiency =
× 100%
= 80%
The thermal efficiency of the engine is 80%.
The space between the cars closes at (70+65)=135 km/hr. They collide in (405/135)=3 hours after they start moving. In 3 hours, the canary covers (100km/hr x 3)= 300 km.
Answer: B) Light
Explanation: light waves are Electromagnetic waves. Visible light is one of the many types of electromagnetic waves. The others are mechanical waves.