If the speed<span> of the </span>object<span> becomes </span>double<span>, </span>its kinetic energy<span> changes to four times the initial </span>kinetic energy<span>. Hope it help!</span>
Answer:
The time interval is
Explanation:
From the question we are told that
The constant acceleration is
The displacement is
According to the second equation of motion we have that
given that the blade started from rest
which is the initial angular velocity is 0
So
=>
substituting values
=>
=>
Answer:
150 m
Explanation:
velocity = 22m/s
time = 6.8 s
distance = velocity × time
= 22 × 6.8
= 149.6
≈ 150 m
The white fur reflects all colors, so would appear green.
The black fur reflects no colors, so would still appear black.
Answer:
I1 < I2
V1 > V2
Explanation:
Let the EMF of both the batteries is E and the internal resistance of both the cells is r.
The relation between the current and the EMF is given by
where, R be the resistance connected in the circuit.
the relation between the terminal potential difference and the EMF is given by
V = E - Ir
where, V is the terminal potential difference
If R1 is connected,
The current is given by
.... (1)
The terminal potential difference is given by
..... (2)
If R2 is connected,
The current is given by
.... (3)
The terminal potential difference is given by
..... (4)
As given in the question, R2 > R1
So, by the equation (1) and (3), we get
I1 < I2
and by the equation (2) and (4) ,we get
V1 > V2