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4 years ago

11

Power is equal to voltage multiplied by current. Add the missing information in each of the following power equations. P = V P =

R P = V2

1 answer:

butalik [34]4 years ago

6 0

P = V × I
P = R × I^2
P = V^2/R

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The diagram shows the electric field due to point charge Q. Which statements are correct? Check all that apply.

Bess [88]

Answer:

The <em>correct</em> statements are:

<em>A. The electric field is nonuniform.</em>

<em>D. Charge Q is positive.</em>

<em>E. If charge A moves toward charge Q, it must be a negative charge</em>

Explanation:

The answer choices are:

A. The electric field is nonuniform.

B. The electric field is uniform.

C. Charge Q is negative.

D. Charge Q is positive.

E. If charge A moves toward charge Q, it must be a negative charge.

F. If charge A moves toward charge Q, it must be a positive charge.

<h2>Solution</h2>

The <em>electric field</em> is the electrostatic force per unit of charge,

$\vec E=\dfrac{\vec F}{Q}$

around around a charge, where another charge would experience the electrostatic force.

The electric field lines are shown in a diagram with arrows ditributed radially away from a positive charge and radially toward a negative charge.

Since the arrows are away from Q, Q is a positive charge: <em>statement D.</em>

Since the size of the arrows decreases as you move away from Q the stregth of the field is not uniform: <em>statement A.</em>

Since the charge Q is positive, a negative charge would be attracted toward it: <em>statement E.</em>

4 0

3 years ago

What is the frequency of a 5 m wave traveling at the speed of 200 m/s

morpeh [17]

Explanation:

f=v/wavelength

=200/5

=40Hz

7 0

3 years ago

An astronaut is in space with a baseball and a bowling ball. The astronaut pushes both objects in the same direction. If both ba

Crazy boy [7]

Answer:

As a mass greater than that of baseball, at the moment of the bowling wave the moment of the baseball ball is also greater

Explanation:

This problem is an application of momentum and momentum. When the astronaut pushed balls, he needed more force to move the ball of greater mass (bowling). The expression for soul is

p = m v

Besibol Blade

p1 = m1 v

Bowling ball

p2 = m2 v

As a mass greater than that of baseball, at the moment of the bowling wave the moment of the baseball ball is also greater

p2 >> p1

3 0

4 years ago

What carries an electric current through a solution?

sashaice [31]

Free ions. Negative ions have one extra electron, positive ions are missing an electron. Negative ions give up their extra electron easily. I hope my answer has come to your help. God bless and have a nice day ahead! Feel free to ask more questions.

8 0

3 years ago

a baby carriage is sitting at the top of a hill that is 21m high. the carriage with the baby weighs 25kg. calculate the speed th

Ulleksa [173]

Answer:

Velocity = 20.3 [m/s]

Explanation:

This is a typical problem of energy conservation, where potential energy is converted to kinetic energy. We must first find the potential energy. In this way, we will choose as a reference point or point where the potential energy is zero when the carrriage rolls down 21 [m] from the top of the hill.

$E_{p} =m*g*h\\ where:\\m = mass = 25[kg]\\g = gravity = 9.81 [m/s^2]\\h = elevation = 21 [m]\\E_{p} =potential energy [J]\\E_{p} =25*9.81*21=5150[J]$

Now this will be the same energy transformed into kinetic energy, therefore:

$E_{p}=E_{k} = 5150[J]\\E_{k} =0.5*m*v^{2} \\where:\\v=velocity [m/s]\\v=\sqrt{\frac{E_{k}}{0.5*25} } \\v=20.3[m/s]$

3 0

3 years ago