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Natalka [10]
3 years ago
15

The brightest, hottest, an

Physics
1 answer:
dangina [55]3 years ago
6 0

The speed of the star is 255 km/s

Explanation:

The kinetic energy of a body is the energy possessed by the body due to its motion. Mathematically:

KE=\frac{1}{2}mv^2

where

m is the mass of the object

v is its speed

For the star in this problem, we have:

m=3.38\cdot 10^{31} kg is the mass

KE=1.10\cdot 10^{42} J is the kinetic energy

Therefore, the speed of the star is:

v=\sqrt{\frac{2KE}{m}}=\sqrt{\frac{2(1.10\cdot 10^{42})}{3.38\cdot 10^{31}}}=2.55\cdot 10^5 m/s

Which corresponds to 255 km/s

Learn more about kinetic energy:

brainly.com/question/6536722

#LearnwithBrainly

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The voltage supplied to a circuit is 17 V and the current running through is 10 A. What is the power generated?
Lelu [443]

Answer:

170 W

Explanation:

Applying

P = VI.................... Equation 1

Where P = Power generated in watt, V = Voltage supplied to the circuit, I = Current running through the circuit.

From the question,

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Substitute these values into equation 1

P = (17×10)

P = 170 Watt.

Hence the power generated is 170 W.

The right option is A. 170 W

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3 years ago
Calculate the current flowing if a charge of 36 kilocoulombs flows in 1 hour.
o-na [289]

Answer:

Current = 10 Amperes.

Explanation:

Given the following dat;

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To find the current;

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Substituting in the equation

36000 = current * 3600

Current = 36000/3600

Current = 10 Amperes.

6 0
3 years ago
Help with these please someone?
DIA [1.3K]

Answer:

8. 2.75·10^-4 s^-1

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3 years ago
The latent heat of fusion of alcohol is 25 kcal/kg and its melting point is -114 o C. It has a specific heat of 0.60 in its liqu
UNO [17]

Answer:

=170kcal

Explanation:

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We then calculate amount of heat required to raise the temperature of liquid alcohol to -14° C using MC∅.  We then add the two.

Thus ΔH=MLf+MC∅

ΔH=2kg×25kcal/kg+ 2kg×(0.6kcal/kg.K×(-14-⁻114)

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