Q7. What caused the early materials to clump together?

Physics

1 answer:

tekilochka [14]2 years ago

4 0

Answer:

C. pressure

because heat expands and so does explosions and gravity is just gravity.

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A lamp is marked 24V, 100W. Describe an experiment to check that the electrical power supplied to the lamp is 100W when the p.d.

topjm [15]

The electrical power supplied to the lamp is 100W when the p.d. across it is 24V and the current is 4.2 A.

<h3>What is electrical power?</h3>

Electrical power is the rate at which electrical work is done.

The unit of electrical power is Watts.

Power = Current × Voltage

The experiment will require a 24V Battery, a Lamp marked 24V, 100 W, a key, wires, a rheostat, a voltmeter and an ammeter.

The circuit is completed and the rheostat is adjusted to provide until the voltmeter reads 24V.

The ammeter reading is taken as well.

When the voltmeter reading is 24V, it can be seen that' the ammeter reading for current is approximately 4.2 A.

Calculating, the power of the lamp:

Power = 24 × 4.2 = 100 W

Therefore, the electrical power supplied to the lamp is 100W when the p.d. across it is 24V and the current is 4.2 A.

Learn more about power and p.d. at: https://brainly.in/question/13629965

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1 year ago

What constant acceleration in si units must a car have to go from zero to 60 mph in 10s. what fraction of g is this?

Sophie [7]

The acceleration of the car in SI units is 2.68m/s².

The acceleration is 0.27 times the acceleration due to gravity g.

Convert the speed in mph into m/s.

1 mile = 1609 m and 1h = 3600 s.

Therefore,

$v=(\frac{60 miles}{1 h} )(\frac{1609 m}{1 mile} )(\frac{1h}{3600s)} =26.82m/s$

Acceleration is the rate of change of velocity. The car starts from rest , its initial velocity u = 0 and accelerates to a velocity v of 26.82 m/s in 10 s.

Use these values in the equation and calculate the acceleration.

$a=\frac{v-u}{t} \\ =\frac{(26.82 m/s)-(0m/s)}{10s} \\ =2.682 m/s^2$