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Citrus2011 [14]
1 year ago
11

2.

Physics
2 answers:
saul85 [17]1 year ago
4 0

Answer:

<u>B</u>

Explanation:

Planets have different year lengths because it depends how far they revolve from a celestial body. Each planet has its own orbital period. Planets closer to the star will have a lower orbital period compared to the ones that lie far away from it.

Vera_Pavlovna [14]1 year ago
4 0

2.A year on Jupiter is 4,333 days long. A year on Mercury is 88 days long. Why do

planets have different length years?

The correct answer is B.

-Each Planet has its own orbital period.

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Problem 3) Bob stands at the edge of the swimming pool holding a laser 1.5m above the ground. He shines the red laser beam onto
Vadim26 [7]

Answer:

d = 5.75m

Explanation:

Using snell's law, we have,

n₁ × sin(i) = n₂ × 2 × sin(r)

n1= refractive index of 1st medium= 1

n2=  refractive index of 2nd medium = 1.33

r= angle of reflection

therefore,

r = \sin^{-1}\frac{n_1\sin i}{n_2}

Here,

i = 90 - θ

\theta = \tan^-^1(\frac{1.5}{3} )\\\\=26.56^\circ

r = \sin^{-1}\frac{n_1\sin i}{n_2}

r = \sin^{-1}\frac{(1)\sin (90-26.56)}{1.33}\\\\r = 42.26m

\tan r = \frac{2.5}{d_1}

d_1 = \frac{2.5}{\tan (42.26)} \\\\d_1 = 2.75m

Therefore, the distance is

d = 3 + d₁

d = 3 + 2.75

d = 5.75m

6 0
3 years ago
Human sense impressions are subjective and qualitative
Fittoniya [83]

Answer:trueee

Explanation:

7 0
3 years ago
Just about everyone at one time or another has been burned by hot water or steam. This problem compares the heat input to your s
tatyana61 [14]

Answer:

Q_T=63313.5\ J

Explanation:

Given:

  • temperature of skin, T_s=34^{\circ}C
  • initial temperature of steam vapour, T_v=100^{\circ}C
  • latent heat of steam, L=2256\ J.g^{-1}
  • mass of steam, m=25\ g
  • specific heat of water, c=4190\ J.kg^{-1}.K^{-1}=4.19\ J.g^{-1}.K^{-1}
  • final temperature, T_f=34^{\circ}C

<em>Assuming that no heat is lost in the surrounding.</em>

<u>We know:</u>

Q=m.c.\Delta T

<u>Now the total heat given by the steam to form water at the given conditions:</u>

Q_T=Q_{Lv}+Q_w ..............................(1)

where:

Q_{Lv}= latent heat given out by vapour to form water of 100°C

Q_w= heat given by water of 100°C to come at 34°C.

putting respective values in eq. (1)

Q_T=m(L+c.\Delta T)

Q_T=25(2256+4.19\times 66)

Q_T=63313.5\ J

is the heat transferred to the skin.

4 0
3 years ago
9. What do people playing pool use to determine their shots?
jek_recluse [69]
Angles, they line up their pool que with the pocket and make the shot
7 0
3 years ago
The sun rose at 6:54 this morning.<br>is this an observation or inference?
jeka57 [31]


Observation: You saw/ observed something and you are stating that.

Inference: You are predicting something to be true. If so and so, then this will occur.

4 0
3 years ago
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