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3 years ago

______is the amount of matter in an object. It does not change regardless

Physics

1 answer:

kicyunya [14]3 years ago

6 0

Answer:

Mass

Explanation:

The weight of an object is dependent upon the mass and the value of acceleration due to gravity:

W = mg

Since the value of acceleration due to gravity (g) changes from planet to planet. Hence, the weight of an object also changes with location.

Friction depends upon the material of surfaces and the weight.

F = (coefficient of friction)W

Since weight changes with location. Therefore, the friction also changes with location.

The mass of an object is the quantity of matter contained in the body. It remains constant anywhere in the universe.

Hence, the correct option is:

Mass

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Who proposed the theory that mental processes originated in the brain?

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Plato was the one that suggested that the brain is the mechanism of mental process.

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ow long must a simple pendulum be if it is to make exactly ten swings per second? (That is, one complete vibration takes exactly

Igoryamba

The period T of a pendulum is given by:
$T=2 \pi \sqrt{ \frac{L}{g} }$
where L is the length of the pendulum while $g=9.81 m/s^2$ is the gravitational acceleration.

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3 years ago

A scientist is conducting research to determine how much pressure a dam can withstand. Why are good observations important to hi

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3 years ago

Why are black holes considered the "destroyers and creators" of life? A. Black holes play a role in the formation of galaxies th

bezimeni [28]

Answer:

Explanation:

A is just the most logical. Sagittarius doesn't mean anything here.

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3 years ago

When a gas is heated, it absorbs 196 joules of heat from the surroundings. At the same time, the gas expands, doing pressure-vol

timurjin [86]

Answer:

(a) q positive; w negative.

(b) ΔE = -126 J

Explanation:

(a) Determine whether the amounts of heat (q) and work (w) exchanged should have positive or negative signs. heat (q) positive negative work (w) positive negative

By convention, when the system absorbs heat from the surroundings, its sign is positive, that is, q = 196 J.

By convention, when the system exerts work on the surroundings, its sign is negative, that is, w = -322 J.

(b) Calculate the change in internal energy (ΔE) of the gas. J

The change in internal energy (ΔE) can be calculated using the following expression.

ΔE = q + w

ΔE = 196 J + (-322 J) = -126 J

(c) Determine whether one or more of the following is a state function:

internal energy (E) of a system,

change in internal energy (ΔE) of a system,

heat (q) absorbed or released by a system,

work (w) done on or by a system.

E and ΔE are state functions (they only depend on the states of the gas), whereas q and w depend on the trajectory.

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3 years ago