Answer:
Given:
Initial speed (u) = 22 m/s
Final speed (v) = 0 m/s (Rest)
Time taken (t) = 4 seconds
To Find:
Distance travelled by car (s)
Explanation:
From equation of motion of object moving with uniform acceleration in straight line we have:
By substituting value of v, u & t in the equation we get:
Distance travelled by car (s) = 44 m
Explanation:
Power is found through the equation,
P
=
W
t
W
is the work done in joules
t
is the time taken in seconds
Work done is given by the equation,
W
=
F
⋅
d
F
is the force exerted in newtons
d
is the distance moved in meters
And so, the work done is:
W
=
35
N
⋅
10
m
=
350
J
Therefore, the power used up is:
P
=
350
J
5
s
=
70 W
Answer:
Explanation:
For the first case , the expression for electrostatic force can be given by the following .
F = K x 8Q x 2Q / r² where k is a constant .
F = K 16 Q² / r²
When they touch , some charge is neutralized . Net charge remaining
= 8Q - 2 Q = 6 Q
Charge on each sphere = 6Q/2 = 3 Q .
Force between them
F₁ = k 3Q x 3 Q / r² = k 9 Q² / r²
F₁ / F = 9 / 16
F₁ = 9 F / 16 .
I’m pretty sure the second blank is solid to a liquid and the third blank is melting point
Answer:
Explanation:What is the root-mean-square velocity (vrms) of the center of mass of one of the molecules?