Which of the following best describes a direct current

Answers

Answer 1

Answer: Direct current-is the unidirectional flow or movement of electric charge carries(which are usually electrons.

Answer 2

Answer: its an unidirectional flow of electric charge

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Related Questions

Which of the following objects has the greatest inertia?a. baseball b. bowling ball c. pencild. toothpick
Which body is in equilibrium?(1) a satellite orbiting Earth in a circular orbit(2) a ball falling freely toward the surface ofEarth(3) a car moving with a constant speed along astraight, level road(4) a projectile at the highest point in its trajectory
Explain how DNA codes for traits
The potential energy is calculated as ____ (use g=10m/s^2 for your calculating)
Which particles are not affected by the strong force?

What substances were found in the innermost regions (within about the inner 0.3 AUAU) of the solar system before planets began to form?

Answers

Answer:

Hydrogen and helium compounds.

Explanation:

We know that the solar System was formed around 4.6 billion years ago, due to the gravitational collapse of a giant interstellar molecular cloud.

This cloud is a type of interstellar cloud and its density and size permit the formation of molecules, most commonly molecular hydrogen.

Therefore the principal substances were found before planets began to form are hydrogen and helium compounds, besides Rocks, metals, most of them in gaseous form.

I hope it helps you!

While standing on a balcony a child drops a penny. The penny lands on the ground floor 1.5 s later. How fast was the penny traveling vertically when it struck the ground floor? *The height of the balcony is 11.025 meters

Answers

Answer:

14.7 m/s.

Explanation:

From the question given above, the following data were obtained:

Time (t) = 1.5 s

Acceleration due to gravity (g) = 9.8 m/s².

Height = 11.025 m

Final velocity (v) = 0 m/s

Initial velocity (u) =?

We, can obtain the initial velocity of the penny as follow:

H = ½(v + u) t

11.025 = ½ (0 + u) × 1.5

11.025 = ½ × u × 1.5

11.025 = u × 0.75

Divide both side by 0.75

u = 11.025/0.75

u = 14.7 m/s

Therefore, the penny was travelling at 14.7 m/s before hitting the ground.

A machine does 1,500 joules of work in 30 seconds. What is the power of this machine?

Answers

the power of the machine is 50

If you had thrown the pennies down from the observation deck 321m above street level at an initial velocity of 1.99m/s, determine their speed as they reach the ground.

Answers

Answer: 79.3 m/s

Explanation: Use the equation V^2-Vo^2=2a(ΔY)

We know that the initial velocity is 1.99 m/s, so that is our Vo. We also are given that the height of the deck is 321, so therefore, our delta y is 321. Finally, our acceleration is 9.81 m/s^2 since that is the acceleration of gravity during free fall. We are solving for the final velocity (V)

So, our equation is V^2-(1.99^2)=2(9.8)(321)

Next, V^2-(3.96)=6291.6

V^2=6295.56

Take the square root of both sides, and V=79.3 m/s

Answer:79.3 m/s

Explanation:

The rate of doing work is called _____.
power
force
energy
inertia

Answers

The rate of doing work is called power.

Hence, the correct option is A.

Power is a measure of how quickly or how much work is done per unit of time.

It is the amount of energy transferred or converted per unit time. The unit of power is the watt (W), where 1 watt is equal to 1 joule of work done per second.

Therefore, The rate of doing work is called power.

Hence, the correct option is A.

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Final answer:

Power is the correct term in physics for the rate of doing work. It signifies the amount of work done or energy converted per unit of time. Other options provided like force, energy, and inertia have different meanings in physics.

Explanation:

The rate of doing work is called power. In physics, power is defined as the amount of work done or energy converted per unit of time. For example, when you lift a heavy box, you're doing work, and the faster you lift that box (maintaining the same force), the more power you're exerting.

Whereas force is a push or pull upon an object resulting from the object's interaction with another object, energy is the capacity for doing work, and inertia refers to an object's resistance to change in motion.

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An automobile having a mass of 941 kg is driven into a brick wall in a safety test. The bumper behaves like a spring of constant 2.37 × 106 N/m and compresses 1.61 cm as the car is brought to rest What was the speed of the car before impact, assuming no energy is lost during impact with the wall? Answer in units of