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Aliun [14]
3 years ago
9

An explosion that destroys a massive star is called a

Physics
2 answers:
BigorU [14]3 years ago
4 0

B) is the correct answer hope this helps
ololo11 [35]3 years ago
3 0
An explosion that destroys a massive star is called a supernova ........the answer is B) supernova
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Two electric motors drive two elevators of equal mass in a three-story building 10 meters tall. Each elevator has a mass of 1,00
wlad13 [49]

Answer:

Power output = 2\times 10^4\ W

Explanation:

Given:

Mass of the elevator is, m=1000\ kg

Height to which it is raised is, h=10\ m

Acceleration due to gravity is, g=10\ m/s^2(Approximately)

Time taken by the motor to raise the elevator is, t=5.0\ s

Now, work done on the elevator by the motor is equal to the increase in the gravitational potential energy of the elevator.

Increase in gravitational potential energy is given as:

\Delta U=mgh=(1000)(10)(10)=10\times 10^4\ J

Therefore, work done by motor is, W=10\times 10^4\ J

Now, we know that, power is work done in unit time. So, power output is given as:

Power=\frac{W}{t}\\\\Power=\frac{10\times 10^4\ J}{5.0\ s}\\\\Power=2\times 10^4\ J/s\\\\Power=2\times 10^4\ W..........[1 W = 1\ J/s]

Therefore, the power output of the first motor is 2\times 10^4\ W

7 0
3 years ago
The tangent line needs to touch 0.6, did i draw it correctly? ​
AleksandrR [38]
Here you go! Did you get my answer?
8 0
3 years ago
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Mass is a fundamental quantity ​
Oliga [24]

Explanation:

okk hope you like then comment

5 0
3 years ago
A thunderclap sends a sound wave through the air and the ocean below. The
marysya [2.9K]

Answer:

C. 14.93 m

Explanation:

The given frequency of the wave, f = 100 Hz

The given equation for the wave speed, <em>v</em>, is presented as follows;

v = f × λ

The speed of sound in water, v = 1,493 m/s

Therefore, we get;

The wavelength, λ = v/f

∴ λ = 1,493 m/s/(100 Hz) = 14.93 m

The wavelength, λ = 14.93 m.

8 0
3 years ago
How much force to move 18 kg at a rate of 3m/s​
Stolb23 [73]

Answer:

54N

Explanation:

F = ma

F = (18kg)(3m/s)

F = 54N

4 0
3 years ago
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