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nydimaria [60]
3 years ago
13

After a storm, a hospital may have to rely on backup generators to power some equipment. Which is the energy conversion provided

by the generators?
A. mechanical to electrical energy

B. thermal to mechanical energy

C. nuclear to mechanical energy

D. thermal to electric energy
Physics
1 answer:
IceJOKER [234]3 years ago
7 0

Answer:

in a generator mechanical energy is a device that converts a form of energy into electricty

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Which graph shows the correct relationship between kinetic energy and speed?
Mamont248 [21]

Answer: D

Explanation:

Kinetic energy = 1/2mV^2

From the formula above, we can deduce that kinetic energy is proportional to the square of speed. That is,

K.E = V^2

Graphically, the relationship isn't linear but a positive exponential. Therefore, option D is the correct answer.

3 0
3 years ago
Please help on this one?
ruslelena [56]

Answer:

A, 30V

Explanation:

First combine all resistors to an equivalent resistor. Since they are in series, the equivalent resistance is the sum of all resistor

Req = 20 + 40 + 60 = 120Ω

Using Ohm's law, find the current in the circuit

V = I * R

I = V / R

I = 60V / 120Ω

I = 0.5 A

Now the potential drop across the resistor R3 is the current times R3 resistance, therefore:

Vdrop = 0.5A * 60Ω = 30V

So the potential drop across resistor R3 is 30 V

3 0
3 years ago
Read 2 more answers
If an object starting from rest falls 5.7 seconds how far does it fall
White raven [17]
Kinematic question!
Start with your knowns!

t = 5.7s \\ v0 = 0 \frac{m}{s}  \\ a =  - 9.8 \frac{m}{ {s}^{2} }
we want to find x!

the only kineamtic that works with this info is the third!
x = v0 \times t + \frac{1}{2}  \times a \times  {t}^{2}
so we plug in our values and get
x = 0 +  \frac{1}{2}  \times ( - 9.8 \frac{m}{ {s}^{2} } ) \times ( {(5.7s)}^{2} )
this'll equal out to -159.2 meters.

our units equal out, so we know our answer is correct!
5 0
3 years ago
What is projectile motion
Flura [38]
By definition <span>Projectile motion is a form of motion in which an object or particle i.e. called a projectile is thrown near the Earth's surface, and it moves along a curved path under the action of gravity only</span>
3 0
3 years ago
A 1200-kg car, initially moving at 20 m/s, comes to a stop at a red light over a time of 3 s from the moment the driver hit the
ch4aika [34]

Answer:

Explanation:

Mass of car (M)=1200kg

Initial velocity (u)=20m/s

Stop after time (t)=3sec.

Come to stop implies that the final velocity is zero, v=0m/s

Using newton second law of motion

F=m(v-u)/t

Ft=m(v-u)

Since impulse is Ft

I=Ft

Then, I=Ft=m(v-u)

I=m(v-u)

I=1200(0-20)

I=1200×-20

I=-24,000Ns

The impulse delivered to the car by static friction is -24,000Ns

7 0
2 years ago
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