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Setler79 [48]
3 years ago
13

What is the brightest star in the known universe

Physics
1 answer:
shtirl [24]3 years ago
4 0

Answer:

<u><em>Sirius</em></u>

Explanation:

<u><em>Sirius</em></u> is known s the most brightest star in the sky the second brightest star is <u><em>Canopus</em></u>

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A sound signal traveling underwater has a frequency of 230 hertz. The speed of sound under water is 1. 45 × 103 meters/second. W
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A.6.3

Explanation:

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3 years ago
A point charge is placed 100 m from a 6 µC charge generating an electric field. What is the strength of the electric field on th
allochka39001 [22]

Answer:

5

Explanation:

The answer is 5 on edge.

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How does friction affect speed?
weeeeeb [17]

Answer:

Friction is a force tends to oppose relative motion between bodies when they are in direct contact. Remember this friction does not oppose motion, it opposes relative motion.

Explanation:

7 0
3 years ago
The amount of heat needed to increase the temperature of a solid sphere of diameter 2D of the same metal from 4°C to 7°C
aniked [119]

The amount of heat needed to increase the temperature of a solid sphere of diameter 2D of the same metal from 4°C to 7°C is is 8 times the initial amount of heat.

<h3>What is heat?</h3>

The temperature increment will lead to the increase in the internal energy of the object. This internal energy is the heat.

Given is the change in  temperature ΔT = 7-4 =3°C., diameter D to 2D,

Q = Cp x  ρ(4π/3)D³ x 3..................(1)

and Q' = Cp x  ρ(4π/3)(2D)³ x 3

Q' = Cp x  ρ(4π/3)8D³x 3..................(2)

Dividing both the equation, we have

Q' / Q =8

Q' = 8Q

Thus, the amount of heat needed to increase the temperature of a solid sphere of diameter 2D of the same metal from 4°C to 7°C is 8 times the initial amount of heat.

Learn more about heat.

brainly.com/question/1429452?

#SPJ1

5 0
2 years ago
What is the pressure of a 300 lb. object on a 100 sq. in. area?
denis23 [38]

Answer:

D. 3 psi

Explanation:

Pressure is defined as force acting per unit area and is numerically expressed as:

P= \frac {F}{A}

where P represent pressure, F is force and A is area where the force acts. Substituting 300 lb for force and 100 sq.in for area then pressure,

P=\frac {300 lb}{100 in^{2}}= 3 \ psi

Therefore, from the choices given, option D, 3psi is the right choice.

3 0
3 years ago
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