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3 years ago

Can you help me with a science test

Physics

2 answers:

Semenov [28]3 years ago

8 0

Answer:

yes just give me questions and put me brainliest

Explanation:

CaHeK987 [17]3 years ago

8 0

Answer:ok

Explanation:

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It has been suggested that a heat engine could be developed that made use of the fact that the temperature several hundred meter

lesantik [10]

Answer:

efficiency = 5.4%

Explanation:

Efficiency of heat engine is given as

$\eta = \frac{W}{Q_{in}}$

now we will have

$W = Q_1 - Q_2$

so we will have

$\eta = 1 - \frac{Q_2}{Q_1}$

now we know that

$\frac{Q_2}{Q_1} = \frac{T_2}{T_1}$

so we have

$\eta = 1 - \frac{T_2}{T_1}$

$\eta = 1 - \frac{273+6}{273+22}$

$\eta = 0.054$

so efficiency is 5.4%

8 0

3 years ago

T/-15=-3. what is t?

sweet-ann [11.9K]

Answer:

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4 0

2 years ago

If all else stays the same, which would cause an increase in the gravitational force on a space shuttle?

maks197457 [2]

"decreasing the distance of the space shuttle from Earth"

F = Gm(1)m(2)/R²
where R is the distance between the 2 objects, as it decreases, the force increases.

5 0

4 years ago

Read 2 more answers

A person should power walk for minutes a day in order to benefit from this activity

larisa86 [58]

A person should power walk 30-45 min a day

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3 years ago

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A lunar eclipse occurs only when the Moon is new. A lunar eclipse occurs only when the Moon is new. True False

Fittoniya [83]

False. False.