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Archy [21]
3 years ago
12

A student places a transparent semicircular block on a sheet of paper and draws

Physics
1 answer:
zhuklara [117]3 years ago
5 0

Answer:

As the ray internal to the block strikes the surface with an incidence angle of zero (perpendicular to the tangent at the point of exit) , no refraction can occur.

Explanation:

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At 5.0 minutes, the temperature of the water reaches 100 °C. The volume of the water in the urn
serious [3.7K]

Answer:

fdvevddvevkejokef0jeovdlvkjeuiyv

Explanation:

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4 0
3 years ago
Older railroad tracks in the U.S. are made of 12-m-long pieces of steel. When the tracks are laid, gaps are left between section
____ [38]

Answer: ∆L = 0.49cm ≈ 0.50cm

Therefore there should be 0.5 cm gap between each piece of steel.

Explanation:

Thermal expansion of steel is the increase in size of steel as a result of increased temperature. It can be represented by the mathematical expression:

∆L = L(k)∆T .....1

Where;

∆L is the change in length

L is the initial length

∆T is the change in temperature

k is the specific Linear expansion coefficient.

Given;

L = 12m

∆T = 50°C - 16°C = 34°C

k (for steel) = 1.2 × 10^-6 /C

Substituting the values into the equation 1

∆L = 12 × 34 × 12×10^-6

∆L = 4896 × 10^-6 m

∆L = 0.49cm ≈ 0.50cm

Therefore there should be 0.5 cm gap between each piece of steel.

6 0
3 years ago
Read 2 more answers
14
Ksivusya [100]

Answer:

ok so youll tell me when you have problems

4 0
2 years ago
What’s the answer to this question
alexgriva [62]

Answer:

space = 66.24 [m]

Explanation:

To solve this problem we must remember that the average speed is defined as the relationship between a space traveled over a certain time.

Av = \frac{space}{time}

where:

space [m]

Av = average velocity = 3.6 [m/s]

time = 18.4 [s]

space = 3.6*18.4\\space = 66.24 [m]

7 0
3 years ago
Four vehicles approach an intersection with a 4 way stop at the same time. Car B is ahead of Car A and both are in the same lane
garik1379 [7]

Answer: car D

Explanation:

4 0
3 years ago
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