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Annette [7]
4 years ago
14

Work & Power Problems

Physics
1 answer:
Artyom0805 [142]4 years ago
6 0

Answer:

1. Unit for work is measured in Joules.

Formula for work is power * time taken

2 The unit for force is Newton

A work done in lifting a jar of water

3. The unit for measuring power is Joules.

The formula for measuring power is work done/time taken

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Motion with constant acceleration CER lab report <br><br> Can someone help!!
victus00 [196]

Answer:

Fan Speed For Low Position vs Time Graph : The slope is curved and it increases as you go up . The points start off close but they spread out as the time increases.

Fan Speed For Medium Position vs Time Graph : The speed increases quicker than the graph for low speed. The graph is less curved than the one for low speed. Also, the points spread out faster than they did for low speed as the time increases.

Fan Speed For High Position vs Time Graph: The Graph has a smaller curve then the low and medium speed. Also , the points are the furthest apart. The slope is not as spaced out as it was for the rest of the speed graphs .

Explanation: I just finished the lab:)

8 0
3 years ago
An AC source operating at 59 Hz with a maximum voltage of 170 V is connected in series with a resistor (R = 1.2 kΩ) and an induc
Alexxandr [17]

I = V/Z

V = voltage, I = current, Z = impedance

First let's find the total impedance of the circuit.

The impedance of the resistor is:

Z_{R} = R

R = resistance

Given values:

R = 1200Ω

Plug in:

Z_{R} = 1200Ω

The impedance of the inductor is:

Z_{L} = j2πfL

f = source frequency, L = inductance

Given values:

f = 59Hz, L = 2.4H

Plug in:

Z_{L} = j2π(59)(2.4) = j889.7Ω

Add up the individual impedances to get the Z, and convert Z to polar form:

Z = Z_{R} + Z_{L}

Z = 1200 + j889.7

Z = 1494∠36.55°Ω

I = V/Z

Given values:

V = 170∠0°V (assume 0 initial phase)

Z = 1494∠36.55°Ω

I = 170∠0°/1494∠36.55°Ω

I = 0.1138∠-36.55°A

Round the magnitude of I to 2 significant figures and now you have your maximum current:

I = 0.11A

5 0
3 years ago
Which object is completely opaque?
Pavel [41]

Answer:

a

Explanation:

light can not pass through it completely

7 0
3 years ago
Why do we feel cool when we spray perfume in our body​
KiRa [710]
Because the perfume is sprayed as a fine mist. This exposes a lot of its surface area to air, causing it to evaporate quickly. That makes us feel cooler.
5 0
4 years ago
Read 2 more answers
Which of the following statements is true about light? A. Light needs a medium through which to travel B. Light can not be diffr
maksim [4K]
From that ragged, motley list of statements, only 'C' is true.
6 0
3 years ago
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