Explanation:
Power = Energy / Time
When the velocity doubles the kinetic energy increases by a factor of 4.
So if the time is constant and the velocity doubles, then the power will increase to a factor of 4.
The image of the object is 8cm to the left of the lens (D)
<h3>
</h3>
What is the image of an object?
The image of an object is said to be the location where light rays from that object intersect with a mirror by reflection.
It is calculated thus:
1÷v = 1÷f - 1÷u
<h3>How to calculate the image of an object</h3>
From the formula
1÷v = 1÷f - 1÷u
<h3>
Where </h3>
V = image distance fromthe object
U = object
f = focal length
Substitute the values
1÷v = 1÷8 - 1÷ 4
1÷v = - 1÷8
Make v the subject of formula
v = -8cm
Therefore, the image of the object is 8cm to the left of the lens (D)
Learn more on focal length here:
brainly.com/question/25779311
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I'm 99% sure that it's "D. Electric Field"
Answer:
C. Zero for ammeter; infinity for voltmeter
Explanation:
Ammeter: A device that is used to measure the current through a circuit.
Voltmeter: A device that is used to measure the electric potential difference between two points in a circuit.
The relation among voltage (v), current (i), and resistance (r) is given as,
In ideal cases an ammeter must have zero resistance so that there is no voltage drop across it and accurate value of current will be measured.
In case of an ideal voltmeter, the resistance should be infinite so that the current across it is zero.
Answer:
1. s
2. m
3. start m/s
4. end m/s
5. m/s^2
Explanation:
1. t is the suffix for the time and it is related to seconds [s]
2. d is the suffix for distance and it is related to meters [m]
3. Vi is the suffix for the initial velocity and it is related to meters per second [m/s]
4. Vf is the suffix for the final velocity and it is related to meters per second [m/s]
5. a is the suffix for the acceleration and it is related to meters per squared second [m/s^2]