The strength of gravitational force is dependent on the masses of and distance between two objects. a. True
b. False

Answers

Answer 1

Answer:
Truer words are seldom written.

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What increases as the temperature of a solid object rises?A. thermal energy

B. potential energy

C. volume

D. mass

Answers

answer is thermal energy

A. Thermal energy
Thermal energy is heat energy, therefore the hotter a solid is the more thermal energy it has.

C. Volume
When an object gets hotter, it expands. This is becuase the particles vibrate more and so are less compact.

Two forces, of magnitude 4n and 10n, are applied to an object. the relative direction of the forces is unknown. the net force acting on the object __________.

Answers

The net force acting on the object can be either 14 N (if they're in the same direction) or 6 N (if they're in opposite directions).

The net force acting on the object can be determined by considering the vector addition of the two forces. Since the relative direction of the forces is unknown, we need to consider two extreme cases: one where the forces are in the same direction, and the other where they are in opposite directions.

1. Forces in the same direction:

If both forces are acting in the same direction, their magnitudes simply add up:

Net Force = 4 N + 10 N = 14 N

2. Forces in opposite directions:

If both forces are acting in opposite directions, the net force is the difference between their magnitudes:

Net Force = 10 N - 4 N = 6 N

So, depending on the relative direction of the forces, the net force acting on the object can be either 14 N (if they're in the same direction) or 6 N (if they're in opposite directions).

To learn more about force follow the link:

brainly.com/question/13191643

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Final answer:

The net force acting on an object with forces of 4N and 10N, if the direction is unknown, can range from 6N (if forces are opposite) to 14N (if forces are in the same direction).

Explanation:

In physics, the net force acting on an object is the vector sum of all forces acting on it. If the direction of forces is unknown, the net force can be anywhere between the difference (10N - 4N = 6N) and the sum (10N + 4N = 14N) of the magnitudes of the two forces. This is because if the two forces act in the same direction, they add up (resulting in 14N). But if they act in opposite directions, one force will subtract from another (resulting in 6N). If the directions are at an angle, the resultant would be calculated using Pythagoras theorem or trigonometric functions, but we don't have that information from the question.

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If my final exam is worth 30% and my class average is 80, what do I need to get to pass the exam?

Answers

You haven't told us what the passing percentage is on the exam,
or what the passing percentage is for the semester, or any of that.

The charge on an electron is:
positive
negative
neutral
unknown

Answers

negative

Firstly it is best to describe the shape and structure of an atom, an atom's system and structure is like of the solar planet, the heliocentric view where the sun is the neutrons and protons and the planets are the electrons. Moreover, the electrons are outside these neutrons and protons surrounding the entire system of its atomic structure. Its movement is like of a planet.

An energy level also known as electron shell, or just shell is a location around an atom where electrons with a specific energy value, or quantum number may be found.

Four power transistors, each dissipating 12 W, are mounted on a thin vertical aluminum plate 22 cm 3 22 cm in size. The heat generated by the transistors is to be dissipated by both surfaces of the plate to the surrounding air at 25°C, which is blown over the plate by a fan. The entire plate can be assumed to be nearly isothermal, and the exposed surface area of the transistor can be taken to be equal to its base area. If the average convection heat transfer coefficient is 25 W/m2·K, determine the temperature of the aluminum plate. Disregard any radiation effects.

Answers

Answer:

The temperature of the Aluminium plate 44.84⁰C

Explanation:

Number of transistors = 4

Since the heat dissipated by each transistor is 12W

Total heat dissipated, Q = 4 * 12 = 48 W

Q = 48 W

Cross sectional Area of the Aluminium plate, A = 2(l * b)

l = Length of the aluminium plate = 22 cm = 0.22 m

b = width of the aluminium plate = 22 cm = 0.22 m

A =2( 0.22 * 0.22 )

A = 0.0968 m²

From the heat balance equation, Q = hAΔT

h = 25 W/m²·K

A = 0.0968 m²

ΔT = T - T(air)

T(air) = 25°C

ΔT = T - 25°C

Q = 25 * 0.0968 * ( T - 25)

Q = 2.42 (T - 25)

Substitute Q = 48 into the equation above

48 = 2.42 (T - 25)

T - 25 = 19.84

T = 25 + 19.84

T = 44.84 ⁰C

In which type of wave do the particles in a medium move perpendicular to the direction that the wave moves? A.transverse waves

B.ocean waves

C.surface waves

D.longitudinal waves