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Mazyrski [523]
2 years ago
14

A set of related measures or activities with a particular long term aim​

Physics
1 answer:
qaws [65]2 years ago
5 0

Answer:

program explanation

Explanation:

program explanation

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In the context of energy transfers with hot and cold reservoirs, the sign convention is that _______________.
Likurg_2 [28]

Answer:

B. QC > 0; QH < 0

Explanation:

Given that there are two reservoir of energy.

Sign convention for heat and work :

1.If the heat is adding to the system then it is taken as positive and if heat is going out from the system then it is taken as negative.

2. If the work is done on the system then it is taken as negative and if the work is done by the system then it is taken as positive.

From hot reservoir heat is going out that is why it is taken as negative

Q_H

From cold reservoir heat is coming inside the reservoir that is why it is taken as positive

Q_C>0

That is why the answer will be

Q_H ,Q_C>0

8 0
2 years ago
When a student stands on a rotating table,the frictional force exerted on the student by the table is?
lakkis [162]

Answer:

Less

Explanation:

because static friction is more than rolling friction

7 0
2 years ago
We can block light by placing obstacles in its path, but it’s much more difficult to block sound. Why?
Flauer [41]
<h3><u>Answer;</u></h3>

<em>B. Sound waves can move through various mediums.</em>

<h3><u>Explanation;</u></h3>
  • <em><u>A wave is a transmission of a disturbance from one point to another</u></em>. It involves transmission of energy from the source to another point.
  • <u><em>A wave may or may not require a medium for transmission.</em></u> Waves that require medium for transmission are called <em><u>mechanical waves </u></em>and those that do not require medium for transmission are known as <em><u>electromagnetic waves</u></em>.
  • <em><u>Light is an example of electromagnetic wave therefore it can be blocked when obstacles are placed on its path.</u></em> However, for the case of sound waves, they can not be blocked by an obstacle as sound would travel through the medium used to block.
8 0
2 years ago
Read 2 more answers
Janice's mother often lets her 6-month-old baby sit in front of the television, watching episodes of Sesame Street. What is Jani
brilliants [131]
B.

The child is too old to be gaining something from the screen time.
6 0
2 years ago
Some vehicles, like _____, have different rules for registration and renewal. A. trailers B. coupes C. sedans D. pickup trucks
ycow [4]

Answer:

trailers

Explanation:

7 0
2 years ago
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