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crimeas [40]
3 years ago
13

3. Identify each statement as true or false. Current equals the product of voltage and resistance for an ohmic device.The greate

r the length of a wire, the higher the resistance of the wire.The potential difference produced by a battery varies depending on the circuit in which it is used.The power produced by a battery varies depending on the circuit in which it is used.The thicker an electrical wire, the higher the resistance of the wire. True False
Physics
1 answer:
VARVARA [1.3K]3 years ago
8 0

Answer:

A) Current equals the product of voltage and resistance for an ohmic device. False (current is voltage divided by resistance)

B) The greater the length of a wire, the higher the resistance of the wire. True (Resistivity is directly proportional to lenght and inversely proportional to the cross sectional area)

C) The potential difference produced by a battery varies depending on the circuit in which it is used. False (the potential difference of a battery is constant, the current drawn is what varies with circuit)

D) The thicker an electrical wire, the higher the resistance of the wire. False ( Resistivity is inversely proportional to the cross sectional area of the conductor).

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the shock absorbers in a car act as a big spring with k= 21900 N/m. when a 92.5 kg person gets in, how far does the spring stret
r-ruslan [8.4K]

Answer: 0.04139m

Explanation:

First, we need to calculate the weight of the man which will be:

Weight = mass × acceleration due to gravity

Weight = mg

Weight = 92.5 × 9.8

Weight = 906.5N

Then, we calculate the force which will be:

F = kx

mg = kx

x = mg/k

x = 906.5/21900

x = 0.04139m.

The spring stretched for 0.04139m.

4 0
3 years ago
What happens if the volume of gas is reduced?
kolbaska11 [484]

Answer:

the volume will increase

Explanation:

if the temperature is held constant , the equation is reduced yo Boyle's  law

6 0
3 years ago
The electric potential difference between the ground and a cloud in a particular thunderstorm is 2.5 × 109 V. What is the magnit
muminat

Answer:

U = - 4 x 10^{-10}

Explanation:

ΔV = potential difference = 2.5 * 10^9 Volts

q = charge on electron = -1.6 * 10^{-19} C

electric potential energy is given as

U = q ΔV = ( -1.6 * 10^{-19}  ) ( 2.5 * 10^9  )

               = - 4 x 10^{-10}

6 0
3 years ago
When opening a door, you push on it perpendicularly with a force of 57.0 n at a distance of 0.470 m from the hinges. what torque
TiliK225 [7]
<span>Torque = force * distance from axis of rotation. Multiply. If it's not perpendicular, you multiply that with the sine of the angle between the force and the perpendicular direction. T= 0.470*57*Sin 90 = 26.79 N</span>
3 0
3 years ago
A 52–newton bird feeder is tied to a cord, which is attached to a tree branch. Describe the tension force of the rope.
iris [78.8K]
If you are given a 52 Newton bird feeder tied to a cord, it means that it has a weight of 52 Newton. Since the bird feeder is not moving, we assume it to exert a force downward, that is its weight, and the cord that ties it, the force is upward. This upward force is the tension and is therefore equal to 52N.
4 0
4 years ago
Read 2 more answers
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