PHYSICS HIGH SCHOOL

Which of the following are voltage sources?a. ohm's law
b. resistance
c. electric charge
d. batteries and wall sockets

Answers

Answer 1
Answer: Batteries and wall sockets
Answer 2
Answer: Electric charge, batteries, and wall outlets are voltage sources. So is a lemon with a copper penny and a galvanized nail stuck in it.

Related Questions

The function of a capacitor in an electric circuit is to what
The _______ is the time required for one complete wave oscillation to occur.
Dark spots on the photosphere are known asA. the corona.B. the chromosphere.C. sunspots.D. solar wind.
. A nonnative species of animal is introduced into a healthy ecosystem. In it's new environment, this species has no predators, although it preys on several native animals in the ecosystem. Make a prediction about the biodiversity and health of this ecosystem in the future.a.) Biodiversity and ecosystem health will both increase in the future. b.) Biodiversity and ecosystem will both decrease in the future. c.) Biodiversity will decrease and ecosystem health will increase in the future. d.) Biodiversity will increase and ecosystem health will decrease in the future.
The AC voltage source is connected to an inductor and a resistor in series. If the frequency of the source is increased the current in the circuit will _________.

What is the value of w in the equation
1/2w + 7 = 2w - 2

Answers

(1)/(2) w + 7 = 2w - 2

First, replace the numerator with 'w'.
(w)/(2) +7=2w-2
Second, multiply both sides by 2.
w + 14 = 4w - 2
Third, subtract 'w' from both sides.
14 = 4w - 4 - w
Fourth, simplify to 3w - 4.
14 = 3w - 4
Fifth, add '4' to both sides.
14+4=3w
Sixth, add 14 + 4.
18 = 3w
Seventh, divide both sides by '3'.
(18)/(3) =w
Eighth, since 6 goes into 3 to get 18, simplify the fraction to 6.
6 = w
Ninth, switch the sides.
w = 6

Answer: w = 6

Choose the answer that explains the photoelectric effect.

Answers

Photoelectric effects occurs in metals. When light or electromagnetic radiation shines upon these metals, electrons jump or are emitted freely. These emitted electrons are therefore called photoelectrons. This phenomenon can be measured in electric currents. Photoelectric effect also denotes the wave-like property of light.

Answer:

Metallic plates emit electrons only when light of a certain minimum frequency shines on them.

Explanation:

If the overall magnification of a series of two lenses is 30x, and one lens magnifies 5x, what is the magnification of the other lens? Calculate the total magnification if the 5x lens is replaced by a 7x lens

Answers

Answer:

Explanation:

Given

Overall magnification M=30 x

One lens magnification is 5 x

suppose the magnification of other lens is y

A compound lens is made up of series of lenses either  of same or of different magnification so

y is given by

y=(30 x)/(5 x)=6 x

If 5 x lens is replaced by 7 x lens then total magnification is

7 x* 6 x=42 x

Final answer:

The second lens has a magnification of 6x. If the 5x lens is replaced by a 7x lens, the new total magnification would be 42x.

Explanation:

To find the magnification of the second lens, we need to know that the overall magnification of a system is the product of the individual magnifications of its elements. If the overall magnification is 30x and one lens magnifies 5x, the magnification of the other lens can be calculated by dividing 30x by 5x, giving us a magnification of 6x for the other lens.

If the 5x lens is replaced by a 7x lens, we can calculate the new overall magnification by multiplying the magnification of the two lenses together. So, 6x (from the other unchanged lens) multiplied by 7x gives us an overall magnification of 42x.

Learn more about Lens Magnification here:

brainly.com/question/33907203

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L 10. A car with a mass of 2,000 kilograms is moving around a circular curve at a uniform velocity of 25 meters per second. The curve has a radius of 80 meters. What is the centripetal force on the car?

Answers

Centripetal Force, F = mv²/r

Where m = mass in kg, v = velocity in m/s and r = radius of curvature in m.

Centripetal Force, F = 2000 * 25² / 80.    Use your calculator.

                           F = 15 625 N.

Are cells live or dead? a. True b. False

Answers

Scientists consider them the smallest form of life. Yes, they are alive

Draw in force and velocity vectors at the four marked positions the object below is moving counterclockwise in uniform circular motion

Answers

This is what it would look like—
Angular velocity = w
Linear velocity = v
Centripetal acceleration = ac
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