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Hoochie [10]
3 years ago
13

Why is it a better to wear a white shirt on a hot summer day instead of a black shirt?

Physics
2 answers:
nlexa [21]3 years ago
8 0
Yes, it is better to wear a white shirt because black is a color that attracts sunlight, therefore, making you sweat more if you wore the black shirt. 
Ugo [173]3 years ago
8 0
Different colors on the visible light spectrum absorb different amounts of heat. Black shirts would absorb the most heat while white shirts would absorb the least making you cooler.
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One speed skater starts across a frozen lake at an average speed of 8 m/s. Ten seconds later, a second speed skater starts from
Luba_88 [7]

Answer:

40 s

Explanation:

After 10 seconds, the first skater would have a 8m/s * 10s = 80 m head start

Let t be the number of seconds after the second skater starts will the second skater overtake the first skater

The distance traveled by the first skater after t seconds is

s_1 = v_1t = 8t

Similarly the distance traveled by the 2nd skater after t seconds is

s_2 = v_2t = 10t

Since the 2nd skater catches up to the 1st one after 80 m behind, the distance traveled by the 2nd one must be 80m greater than the distance of the 1st skater

s_2 = s_1 + 80

We can substitute s_1 = 8t, s_2 = 10t

10t = 8t + 80

2t = 80

t = 80 / 2 = 40 s

7 0
3 years ago
What creates the changes in step 1,2,3 of the nitrogen cycle
Naya [18.7K]
1-fixation ( Bacteria Converts nitrogen to ammonium so plants can use it )
2-nitrification ( bacteria changes ammonium to nitrates and plants )
3 - Assimilation (plants absorb nitrates it is then used for Chlorophyll..)
6 0
3 years ago
Select all that apply.
GenaCL600 [577]

The correct answer to the question is: A) miles/hour and B) metre/ second.

EXPLANATION:

Before answering this question, first we have to understand speed.

The speed of a body is defined as the rate of distance travelled or the distance travelled by a body per unit time.

Hence, it is a derived quantity which is obtained from distance and time.

The unit of distance can be metre, miles, and the unit of time can be second, minutes or hour.

As speed is the distance covered per unit time, the perfect units will be miles/hour and metre/second.

Hence, the correct options are first and second.

5 0
3 years ago
Read 2 more answers
a _______ wave is a mechanical wave in which particles of the medium vibrate in a direction that is parallel to the direction in
Helga [31]
The answer is Longitudinal
6 0
2 years ago
Read 2 more answers
N discussing engines, the ratio of output work to input work expressed as a percentage is called
djyliett [7]

The ration of output work to input work expressed as a percentage is called <u>Efficiency</u>.

5 0
2 years ago
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