Answer:
0.6m/s²
Explanation:
Given parameters:
Initial velocity = 3m/s
Final velocity = 4.5m/s
Time taken = 2.4s
Unknown:
Average acceleration = ?
Solution:
To solve this problem, we use the expression:
Acceleration =
v is the final velocity
u is the initial velocity
t is the time taken
Acceleration = = 0.6m/s²
Q = heat energy , m=mass , c=specific heat , delta T= change in temperature
as you know heat is a form of energy which is <em>usually</em> measured in Joules according to the SI. and also we usually use kilograms for mass.
so you need to know the mass, specific heat, and change in temperature in order to find out the heat energy :)
Answer:The time interval is always positive quantity because time always moves forward. Time can not be reversed.
Explanation:
Velocity is defined as rate of change of position nothing but the displacement. Displacement can be positive or negative.
In case of time interval, time is always a positive quantity. it is impossible to reverse the time. To obtain any displacement we need to measure the time taken. which has to be positive. It always moves forward.
Answer:
The answer is D, boxes 1, 2 and 3