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chubhunter [2.5K]
3 years ago
8

You can see this paper, your desk, and the person in front of you because light is being

Physics
1 answer:
Kazeer [188]3 years ago
7 0
... reflected by each one of the objects.
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There is a skier at the top of a ski slope. The skier has potential energy. What gives the skier his potential energy?
masha68 [24]
A is the answer hope it helps yiu
3 0
2 years ago
During a race, a runner runs at a speed of 6 m/s. 2 seconds later, she is running at a speed of 10 m/s. What is the runner’s acc
igor_vitrenko [27]
Remember what acceleration is? It's how fast the speed is changing over a period of time.

a =  \frac{dv}{dt}

So in dt = 2 secs, she sped up from 6 to 10 m/s and so dv = (10-6) m/s.

Now that you know dv and dt, you can calculate the acceleration a!
5 0
3 years ago
You measure the power delivered by a battery to be 5.83 W when it is connected in series with two equal resistors. How much powe
BabaBlast [244]

Answer:

P = 23.32 W

Explanation:

In series  

equivalent Resistance

R(eq)=R+R=2R

In parallel equivalent resistance

R(eq) = R*R/(R+R) =R/2

since.

power

P=V² / R

in series

⇒V = √(P*R)

=√(5.83*2R )

=√(11.66R)

in parallel

P = V² / R(eq)

=(√(11.66R)²) / (R/2)

P=11.66 * R * 2/R

P = 23.32 W

6 0
3 years ago
As the pulses interfere destructively there is a point in time when the string is perfectly straight. Which of the following sta
uysha [10]

According to the statement we can deduce that the resulting amplitude of the wave pulse is zero when there is a destructive interference of two pulses and the chain is straight. At this point the potential energy will be zero, therefore when applying the energy conservation theorem, the potential energy must be equal to the kinetic energy and be conserved. The potential energy will be totally transferred as kinetic energy and therefore that will be the only energy present in the string.

Thus, the option C is correct.

3 0
2 years ago
Why does an iceberg have more HEAT than a cup of coffee?
Drupady [299]

Answer:

The hot coffee has a higher temperature, but not a greater internal energy. Although the iceberg has less internal energy per mass, its enormously greater mass gives it a greater total energy than that in the small cup of coffee.

Explanation:

3 0
3 years ago
Read 2 more answers
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