When a car maintains a velocity of exactly 65 mph, it's acceleration is zero.
<h3>What is acceleration?</h3>
The acceleration is time rate of change of velocity.
When the velocity is not changing with respect to time, it is said to be an object moving with constant velocity.
At constant velocity, there is no acceleration.
Thus, when a car maintains a velocity of exactly 65 mph, it's acceleration is zero.
Learn more about acceleration.
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It must be a base since it has the opposite reaction to litmus paper as vinegar and vinegar is an acid
Explanation:
The resistance of a wire is given by :

Where
is the resistivity of the wire
l = initial length of the wire
A = initial area of cross section
If length and the area of cross section of the wire is doubled then new length is l' and A', l' = 2 l and A' = 2 A
So, new resistance of the wire is given by :


R' = R
So, the resistance of the wire remains the same on doubling the length and the area of wire.
Pulling open a door, your weight, and a magnet on your refrigerator
The speed with which runner is running is 7.07m/s
<u>Explanation:</u>
Given:
Mass, m = 60kg
Kinetic energy, KE = 1500J
Velocity, v = ?
We know,
Kinetic energy = 
On substituting the value we get,

Therefore, the speed with which runner is running is 7.07m/s