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svlad2 [7]
2 years ago
5

C is correct just an FYI

Physics
1 answer:
belka [17]2 years ago
3 0

Answer:

Huh?

Explanation:

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An object is placed on a surface. A student tries to apply various combinations of forces on the object. Which pair of forces wi
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Answer:

See Explanation

Explanation:

The question is incomplete, as there are no diagrams or options to provide more information to the question.

The general explanation is as follows:

For the object not to move

(1): The forces acting on the object must opposite each other. i.e. if force A acts at the right (or positive direction), force B will act at the left (or negative direction).

(2) The two forces must be equal.

So, for instance:

If the pair of forces are 5N and 5N in opposite directions, the object wil not move.

However, if one of the forces is greater, the object will move towards the direction of the greater force.

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2 years ago
How much heat is needed to melt 13.74 kg of silver that is initially at 20°C?
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Answer:

Q = 4.63 \times 10^6 J

Explanation:

As we know that melting point of silver is

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\Delta T = 961.8 - 20

\Delta T = 941.8 degree C

now from above equation

Q = (13.74)(240)(941.8) + (13.74)(111 \times 10^3)

Q = 3.1 \times 10^6 + 1.53 \times 10^6

Q = 4.63 \times 10^6 J

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2 years ago
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Answer:

The focus of Lesson 1 is Newton's first law of motion - sometimes referred to as the law of inertia. An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

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