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4 years ago

which of the following examples illustrates an energy transfer between the atmosphere and hydrosphere

Physics

2 answers:

seropon [69]4 years ago

7 0

Answer:

C. polar ice reflecting the Sun's light back toward space

Elan Coil [88]4 years ago

6 0

Answer: polar ice reflecting the Sun's light back toward space

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Which force can affect an object without direct physical contact?

denis-greek [22]

Gravity affet everything and it touches nothing.
Hope this helps!

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4 years ago

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Conclusion for ohm law

kari74 [83]

Ohm’s Law states that electrical current is proportional to voltage and therefore inversely proportional to resistance - V = I x R

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3 years ago

A 75-hp (shaft output) motor that has an efficiency of 91% is worn out and is replaced by a high efficiency 75-hp motor that has

ZanzabumX [31]

Answer:

The heat gain of the room due to higher efficiency is 2.84 kW.

Explanation:

Given that,

Output power of shaft = 75 hp

Efficiency = 91%

High efficiency = 95.4%

We need to calculate the electric input given to motor

Using formula of efficiency

$\eta=\dfrac{Work\ Output}{Work\ input}$

$Work\ Input =\dfrac{Work\ output}{\eta}$

$Work\ Input =\dfrac{75\times746}{0.91}$

$Work\ Input =61483.51\ W$

$Work\ Input = 61.48 kW$

We need to calculate the electric input

For, heigh efficiency

$Work\ Input_{inc} =\dfrac{75\times746}{0.954}$

$Work\ Input_{int} =58647.7\ W$

$Work\ Input_{int} = 58.64\ kW$

The reduction of the heat gain of the room due to higher efficiency is

$Q=Work\ Input-Work\ Input_{int}$

Put the value into the formula

$Q=61.48 -58.64$

$Q=2.84\ kW$

Hence, The heat gain of the room due to higher efficiency is 2.84 kW.

3 0

3 years ago

If a swimmer pushes off a pool wall with a force of 250n, what is her acceleration.

grigory [225]

Her acceleration is

(250) divided by (the swimmer's mass, in kilograms).

The unit is " meters per second² " .

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3 years ago

This figure shows an all-sky map of the cosmic microwave background recorded by the wmap telescope. how long did this light trav

hichkok12 [17]

The speed of light in a vac uum is 186,282 miles per second<span> (</span>299,792 kilometers per second<span>), and in theory nothing can travel faster than light. In miles per hour, light speed is, well, a lot: about 670,616,629 mph. If you could travel at the speed of light, you could go around the Earth 7.5 times in one second.

I hope my answer has come to your help. God bless you and have a nice day ahead!
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4 0

3 years ago