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Kipish [7]
3 years ago
12

The wires connecting the switches, light-bulbs and buzzers must start and end at the power source before the circuit can work. T

he power source could be a A) battery.
B) light-bulb.
C) switch.
D) wire.
Physics
2 answers:
MakcuM [25]3 years ago
4 0
A IS THE FINAL ANSWER :)
Lelu [443]3 years ago
3 0
A) Battery. (I suck at explaining things by the way so sorry I only said A please just trust me)

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Dmitry_Shevchenko [17]

Answer:

satisfaction, enjoyment and fair play

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2 years ago
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In one hour, coal supplies 500 000 J of energy. The energy amounts to 380 000 J. How much useful energy is produced in one hour?
Debora [2.8K]

Answer:

120,000J

Corrected question;

In one hour, coal supplies 500 000 J of energy. The wasted energy amounts to 380 000 J. How much useful energy is produced in one hour?

Explanation:

Given;

Total energy Et = 500,000 J

Wasted Energy Ew = 380,000J

The amount useful energy is the amount of energy that is available for supply.

This can be derived by subtracting the wasted energy from the total energy.

Useful energy = Total Energy - wasted energy

Eu = Et - Ew

Substituting the given values;

Eu = 500,000J - 380,000

Eu = 120,000 J

The amount of useful energy produced in one hour is 120,000 J

5 0
2 years ago
An object moves on a trajectory given by Bold r left parenthesis t right parenthesis equals left angle 10 cosine 6 t comma 10 si
spayn [35]

Answer:

10

Explanation:

(r) = <10 cos 6t, 10 Sin 6t>

The distance traveled by the object is the magnitude of vector r.

The magnitude of vector r is given by

r = \sqrt{(10 Cos 6t)^{2}+(10 Sin 6t)^{2}}

r =10 \sqrt{(Cos^{2} 6t)+(Sin^{2} 6t)

r = 10        

5 0
2 years ago
What are the main characteristics of S.H.M​
agasfer [191]

Answer:

•→ The motion of a particle or body in S.H.M acts towards a fixed point.

•→ Acceleration of the body under S.H.M is proportional to its displacement.

•→ This motion is periodic.

•→ Mechanical energy is conserved in S.H.M

Explanation:

S.H.M is Simple Harmonic Motion

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2 years ago
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kotykmax [81]
D = M / V

D = 50 / 5

D = 10 g/cm^3
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