Answer:
2.35 seconds
Explanation:
Remark
This is a question where direction matters. Let us call down + and up minus. It won't matter. The answer will be the same.
Formula
a = (vf - vi)/t
Givens
a = 9.8 m/s^2
vi = - 15 m/s
vf = 8m/s
Solution
9.8 = (8 - - 15)/t Multiply both sides by t
t * 9.8 = 23 Divide by 9.8
t = 23/9.8
t = 2.35 s
The force of the car increases because it is proportional to the acceleration of the object (as stated in the second law). If the object accelerates then the force accelerates, if the acceleration decreases then the force decreases. Same for mass. The force of the car would have changed from 315 newtons of force to 1,260 newtons of force.
Answer:
c- the same
Explanation:
There will be apparent reduction in the weight of the apple due to buoyant force acting on it in upward direction . The magnitude of upward directing buoyant force will be equal to weight of water displaced . The weight of displaced water will remain same if it is completely submerged in water and it is moved from one point to another inside water. So in the given two cases , weight of displaced water will same . Hence the buoyant force too will remain same . Hence the apparent weight too will be same .
So force required to hold apple at deeper point inside water will remain same.
Answer:
Total resistance is 19.6 Ω for the circuit .
Explanation:
Given:
Six resistors of a circuit namely 
to 
.
Where
and 
are in series.
and 
are in parallel.
and are in parallel.
We know that continuous resistor which are in series are added up to find the equivalent resistance.
Similarly resistors which are arranged in parallel their equivalent resistance is 
for the case of and .
According to the question:
Total resistance = R(equivalent) :
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
Ω
So the total resistance of the circuit depicted is 19.58 Ω approximated to nearest tenth that is 19.6 Ω
Why does time seem to flow only in one direction? What happens in the gray zone between solid and liquid? Can we find a unified theory of physics?
