Temperature is said to be directly proportional to the heat addition. However, this is only true when a phase change is not involved in the substance. As heat is being added to a substance, the kinetic energy of the molecules would rise up as well and more heat would be felt in a macroscale. Therefore, increasing the measured temperature of the substance.
Actual velocity of the ping-pong ball= 5 m/s
Explanation:
velocity of ping pong ball because of the shot gun= 4 m/s North
velocity added to the ping-pong ball due to the wind=3 m/s
These velocities are perpendicular to each other. so we use Pythagoras theorem to find the resultant velocity of the ping- pong ball
so the actual velocity of the ping-pong ball =V= √4²+3²
V= √25
V= 5 m/s
Answer:
Explanation:
You can plot their change in position per unit of time. By taking the slope of this graph, you can figure out the velocity at any point
1 centimetres = 10 millimetres
178 centimetres = 10 × 178 = 1780 millimetres
First and second options are incorrect
------------------------------------------------------------------------------------------------------
1 metres = 100 centimetres
178 centimetres = 178 ÷ 100 = 1.78 metres
Third option is correct
-----------------------------------------------------------------------------------------------------
1 cm = 10 mm
1 mm = 1000 micrometres
1 cm = 10000 micrometres
178 cm = 178 × 10⁴ micrometres
Fourth option is incorrect
-----------------------------------------------------------------------------------------------------
1 kilometre = 1000 metres
1 metre = 100 cm178 cm = 178 ÷ 100 = 1.78 metres
1.78 metres = 1.78÷1000 = 1.78 × 10⁻³ kilometres
<u />
Fifth option is incorrect
----------------------------------------------------------------------------------------------------
Correct answer: third option