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3 years ago

Which one of the following accurately describes the force of gravity?

Physics

1 answer:

Aloiza [94]3 years ago

4 0

B. The gravity acceleration is in the same direction as the force of gravity, and thus towards the centre of the earth

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A driverless car collides head on with a stationary sign. The collision brings the car to a stop, but does not move the sign.

neonofarm [45]

Answer:

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3 years ago

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Which of the following is not a part of the appendicular skeleton

Bingel [31]

Answer:

Hyoid

Explanation:

The hyoid is located in the neck area, not the limbs.

7 0

3 years ago

A TV set is pushed a distance of 2 m with a force of 20 N how much work is done on the set

vladimir2022 [97]

Answer:

40 J

Explanation:

8 0

3 years ago

!!!HELP ASAP!!!<br>in witch situation is work being done?<br>theres a photo added.

Arturiano [62]

C..............................

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3 years ago

In one cycle, a heat engine takes in 1000 J of heat from a high-temperature reservoir, releases 600 J of heat to a lower-tempera

Talja [164]

Answer:

η = 40 %

Explanation:

Given that

Qa ,Heat addition= 1000 J

Qr,Heat rejection= 600 J

Work done ,W= 400 J

We know that ,efficiency of a engine given as

$\eta=\dfrac{W(net)}{Q(heat\ addition)}$

Now by putting the values in the above equation ,then we get

$\eta=\dfrac{400}{1000}$

η = 0.4

The efficiency in percentage is given as

η = 0.4 x 100 %

η = 40 %

Therefore the answer will be 40%.

4 0

3 years ago