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2 years ago

The visible spectrum refers to the tiny portion of the electromagnetic spectrum that we ________.

Physics

1 answer:

marusya05 [52]2 years ago

3 0

Answer:

are able to see/observe

Explanation:

Humans are not able to see most wavelengths in the universe--but there is a select range that is visible to our eyes. This (which is usually shown on an electromagnetic spectrum diagram/chart/depiction by a small portion of rainbow) is the visible light spectrum

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A car is raised on a lift at a service station (so it has some amount of gravitational potential energy relative to the ground).

kenny6666 [7]

Answer:Twice

Explanation:

It is given that car is raised on a lift with respect to ground.

Suppose car is raised by a height of h m from ground having mass m so gain in Potential Energy by car is

Gain in $P.E._1=m\times g\times h$

Now if it were raised twice as high,i.e. 2 h height from ground then gain in Gravitational Potential Energy

$=m\times g\times 2h$

$P.E._2=2m\cdot g\cdot h$

It is clear that $P.E._2=2\cdot P.E._1$

Thus in second case gain in Potential Energy is twice as compared to first case

8 0

3 years ago

Which of the following is a major reason for increased female participation in collegiate athletics?1. Title IX legislation2. mo

choli [55]

Answer:

1. Title IX legislation

8 0

3 years ago

PLEASE ANSWER QUESTION FOR 10 POINTS

elena-14-01-66 [18.8K]

C. It is a chemical change due to the change in temperature and gas production

3 0

3 years ago

Read 2 more answers

During each cycle of operation a refrigerator absorbs 56 cal from the freezer compartment and expels 81 cal tothe room. If one c

Alexandra [31]

Answer:

138.18 minutes

Explanation:

$L_v$ = Latent heat of water at 0°C = 80 cal/g

m = Mass of water = 570 g

Heat removed for freezing

$Q=mL_v\\\Rightarrow Q=570\times 80\\\Rightarrow Q=45600\ cal$

Let N be the number of cycles and each cycle removes 56 cal from the freezer.

So,

$55\times N=45600\\\Rightarrow N=\frac{45600}{55}$

Each cycle takes 10 seconds so the total time would be

$\frac{45600}{55}\times \frac{10}{60}=138.18\ minutes$

The total time taken to freeze 138.18 minutes

6 0

3 years ago

What is the gravitational potential energy of a 150 kg object suspended 5m above the Earth's surface

ella [17]

The gravitational potential energy referred to the ground level is given by
$U=mgh$
where m is the mass of the object, $g=9.81 m/s^2$ is the gravitational acceleration and h is the height of the object with respect to the ground.

Therefore in our problem the potential energy is
$U=(150 kg)(9.81 m/s^2)(5 m)=7357.5 J$

6 0

3 years ago