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madam [21]
3 years ago
5

Please answer me my question​

Physics
1 answer:
Angelina_Jolie [31]3 years ago
5 0
3 - b) weight decreases
4 -a) 50 kg as mass is same everywhere
5 - b) 200 dynes
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You have a source of energy containing 21 gj of energy at 600k how much this energy can be converted to work when rejecting heat
sweet [91]

Answer:

Available energy = 35 x 10⁶ J

Explanation:

Given:

Amount of energy (Q) = 21 gj = 21 x 10⁹ J

Temperature T1 = 600 k

Temperature T0 = 27 + 273 = 300k

Find:

Available energy

Computation:

Available energy = Q[1/T0 - 1/T1]

Available energy = 21 x 10⁹ J[1/300 - 1/600]

Available energy = 35 x 10⁶ J

4 0
2 years ago
Why aren’t descriptive investigations repeatable
Kobotan [32]

Answer;

It does not have an hypothesis

Explanation;

The goal of descriptive investigation is to describe. It should provide factual, accurate and systematic descriptions of phenomena without attempting to infer causal relationships. It does not answer questions about the how, when, or why a particular phenomenon occurred.

A descriptive investigation includes a question but no hypothesis. Observations are recorded, but no comparisons are made and no variables are manipulated.

6 0
3 years ago
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What occurs as a ray of light passes from<br> al inilo water?
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Answer:

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3 0
3 years ago
A boat is headed with a velocity of 18 meters/second toward the west with respect to the water in a river. If the river is flowi
artcher [175]

Answer:

20.5

Explanation:

in this case, the two vectors are in the same direction, so they simply add:

total motion = 18m/s + 2.5m/s = 20.5m/s to the west

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To increase friction you could
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You could make the two rubbing thingers come closer together.
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