Answer:
.10/KWh
Explanation:
divide 606 by 61.37 and you get .1012...
The position of the first ball is
while the position of the second ball, thrown with initial velocity , is
The time it takes for the first ball to reach the halfway point satisfies
We want the second ball to reach the same height at the same time, so that
Answer:
D. −F
Explanation:
the rest of the answers are
2/3F
The force is represented as a positive quantity and is repulsive.
Electrostatic force is inversely proportional to the square of the distance.
The direction of the force changes, and the magnitude of the force quadruples.
hope this helps sorry if i was too late! :)
.Answer:
491.4 nm
Explanation:
The distance between central and first maxima is,
And the distance between screen abnd grating is,
Now the angle can be find as,
Now the grating distance is,
Now with m=1 condition will become,
So,
Therefore the wavelength of laser light is 491.4 nm.
Hooke's law states that for a helical spring the extension is directly proportional to the force applied provided the elastic limit is not exceeded.
Therefore; F= ke, where k is the spring constant, F is the force and e is the extension.
k = 2700 N/m and e = 3 cm or 0.03 M
therefore, F = 2700 × 0.03
= 81 N
Thus, the force required will be 81 N