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nikklg [1K]
3 years ago
5

How are work and power related?

Physics
2 answers:
Sholpan [36]3 years ago
6 0
Work involves force and power is the amount of work in a certain time
VashaNatasha [74]3 years ago
5 0
<span>Answer: Work done is a measure of the energy transferred when a force moves a load, power is the rate of energy transfer.</span>
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Please choose the answer that describes the scientific notation for 3,134,000,000.
const2013 [10]
Well, the answer is obviously D, because it's the only one that starts with 3.134.

Moving the decimal place 9 times to the right will give us:

3,134,000,000

\Huge\checkmark
5 0
4 years ago
Read 2 more answers
In research in cardiology and exercise physiology, it is often important to know the mass of blood pumped by a person's heart in
frez [133]

Answer:

0.05081 kg

Explanation:

m_1 = Mass of blood

v_1 = 0.435 m/s

m_2 = Mass of subject and pallet = 54 kg

v_2 = Velocity of subject and pallet = \dfrac{Distance}{Time}=\dfrac{6.55\times 10^{-5}}{0.16}=0.000409375\ m/s

In this system the linear momentum is conserved so,

m_1v_1=m_2v_2\\\Rightarrow m_1=\dfrac{m_2v_2}{v_1}\\\Rightarrow m_1=\dfrac{54\times 0.000409375}{0.435}\\\Rightarrow m_1=0.05081\ kg

The mass of blood is 0.05081 kg

8 0
3 years ago
An dog is transported from the earth to the moon. which measurement is the same in both places
lys-0071 [83]

The dog's length, width, height, mass, volume, density, and color are the same in both places.

4 0
3 years ago
A hot air balloon is traveling vertically upward at a constant speed of 4.5 m/s. When it is 28 m above the ground, a package is
ella [17]

Answer:

1.97 seconds

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.8 m/s²

s=ut+\frac{1}{2}at^2\\\Rightarrow 21=4.5t+\frac{1}{2}\times -9.8\times t^2\\\Rightarrow 21=-4.5t-4.9t^2\\\Rightarrow 4.9t^2+4.5t-28=0\\\Rightarrow 49t^2+45t-280=0

Solving the above equation we get

t=\frac{-45+\sqrt{45^2-4\cdot \:49\left(-280\right)}}{2\cdot \:49}, \frac{-45-\sqrt{45^2-4\cdot \:49\left(-280\right)}}{2\cdot \:49}\\\Rightarrow t=1.97, -2.89

So, the time the package was in the air is 1.97 seconds

3 0
3 years ago
An elevator cab and its load have a combined mass of 1600 kg. Find the tension in the supporting cable when the cab, originally
amid [387]

The tension in the supporting cable when the cab originally moves downward is 18422.4 N

What is tension?

Tension is described as the pulling force by the means of a three-dimensional object.

Tension might also be described as the action-reaction pair of forces acting at each end of said elements.

Here,

m =combined mass = 1600 kg

s = Displacement of the elevator = 42 m

g = Acceleration due to gravity = 9.81 m/s²

u = Initial velocity = 12 m/s

v = Final velocity = 0

According to the equation of motion:

v^{2} - u^{2} = 2as

0 - 12^2 = 2*a*42

a = - 144 / 84

a = - 1.714 m/s^2

Now let's write the equation of the forces acting on the elevator. Taking upward as positive direction:

T-mg = ma

T = m(g-a)

T = 1600 ( 9.8-(-1.74))

T=18422.4 N

Hence,

The tension in the supporting cable when the cab, originally moving downward is 18422.4 N

Learn more about tension here:

<u>brainly.com/question/13772148</u>

#SPJ4

6 0
2 years ago
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