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Alex73 [517]
3 years ago
11

1. Physics is the study of_

Physics
1 answer:
Alexeev081 [22]3 years ago
5 0

Answer:

Explanation:

1. Physics is the study of mass , energy and their mutual relationship.

2. List the fundamental Sl (metric) units for:

time - s,

displacement - m,

velocity - ms,

acceleration- m/s2,

force - N,

weight - Kg,

mass- kg

friction - N.

3. On a "position vs. time" graph, how is velocity found?

A straight line will obtained.

4. On a "position vs. time" graph, how is acceleration represented?

Under the slope of straight line.

5. 32,000 m = 32km

25 m/s =  55.9 miles/hr

50 km/hr =  13.9m/s

6. (2.0 x 105 km) (3.1 x 1012 m) = 658 812 000 m2

7. Describe the motion of the object whose velocity is illustrated in the graph below:

velocity

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Answer:

It appears to rise and set because of the Earth's rotation on its axis. It makes one complete turn every 24 hours. It turns toward the east. As the Earth rotates toward the east, it looks like the sun is moving west.

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A potential difference of 24 V is applied to a 150-ohm resistor. How much current flows through the resistor?​
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Given :- A resistor of 150 ohm, hence Resistance (R) = 150 ohm

Potential Difference (v) = 24 V

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V = IR

24 = I × 150

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hope it helps!

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The component of the external magnetic field along the central axis of a 78-turn circular coil of radius 34.0 cm decreases from
grigory [225]

Answer:

Induced current, I = 18.88 A

Explanation:

It is given that,

Number of turns, N = 78

Radius of the circular coil, r = 34 cm = 0.34 m

Magnetic field changes from 2.4 T to 0.4 T in 2 s.

Resistance of the coil, R = 1.5 ohms

We need to find the magnitude of the induced current in the coil. The induced emf is given by :

\epsilon=-N\dfrac{d\phi}{dt}

Where

\dfrac{d\phi}{dt} is the rate of change of magnetic flux,

And \phi=BA

\epsilon=-NA\dfrac{dB}{dt}

\epsilon=-78\times \pi (0.34)^2\dfrac{(0.4-2.4)}{2}

\epsilon=28.32\ V

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