A student is using a 68 ohm resistor to build a circuit with a voltage source. If the student
needs 0.72 amperes of current to flow through the resistor, what voltage should be used?

Answers

Answer 1

Answer:

48.96V

Explanation:

Given parameters:

Resistance  = 68Ω

Current  = 0.72A

Unknown:

Voltage  = ?

Solution:

According to ohm's law;

           V = IR

V is the voltage

I is the current

R is the resistance

  Now insert the parameters and solve;

      V  = 68 x 0.72 = 48.96V


Related Questions

( WILL GIVE BRAINLIEST TO WHOEVER ANSWERS FIRST AND SHOWS WORK) A car weighs 15300 N. What is its mass?

Answers

Answer:

Mass, m = 1561.23kg

Explanation:

Given the following data;

Weight = 15300N

We know that acceleration due to gravity is equal to 9.8m/s²

To find mass;

Weight can be defined as the force acting on a body or an object as a result of gravity.

Mathematically, the weight of an object is given by the formula;

[tex] Weight, W = mg[/tex]

Where;

m represents the mass of an object measured in kilograms. g is the acceleration due to gravity measured in meters per seconds square.

Substituting into the equation, we have;

[tex] 15300 = m*9.8[/tex]

[tex] m = \frac {15300}{9.8}[/tex]

Mass, m = 1561.23 Kg

Therefore, the mass of the car is 1561.23 kilograms.

Name two offensive strategies that can be utilized in the game of baseball

Answers

Ans: In team offensive strategy, the baseball coach or manager may make certain calls based on the game situation. One play is called ht hit-and-run. This is case where a base runner starts running as soon as the pitcher throws the pitch. The batter is then supposed to try and make contact with the ball.

7. If 8 million kg of water flows over Niagara Falls each second, calculate the power available at the bottom of the falls.

Answers

Answer:

The power will be "3.92×10⁹ Watts". A further explanation is given below.

Explanation:

The given values as per the question,

Rate,

= 8 million kg

Distance,

= 50 m

Gravity,

= 9.8 m/s²

As we know,

The power will be:

⇒ [tex]Power = Rate\times Distance\times Gravity[/tex]

On putting the values, we get

⇒             [tex]= 8\times 10^6\times 50\times 9.8[/tex]

⇒             [tex]=3.92\times 10^9 \ Watts[/tex]

How can we reduce friction

Answers

Answer:

Smoother surfaces, and less contact between objects.

Explanation:

Smoother surfaces create less friction and drag among the object pulled, so we definitely need those kinds of surfaces to reduce friction.

Plz help i need answers to all these questions
1) On a flat surface: What is the net force of a 2kg box if team A is pulling with 20 N and team F is pulling back with 15 N?

Is the box accelerating? How much?

2) On a ramp: What is the net force of a 2kg box if it is on a ramp at a 30 degree angle and there is a force of friction 10 N?

Is the box accelerating?

What is the normal force

3) A 10 – kg box slides down a frictionless 18o ramp.

What is the acceleration of the box?

Answers

Answer:

1) The net force is 5 N. The box is accelerating 10 m/s

2)  The net force is 6.986 N. It is accelerating. Normal Force is 16.986

Explanation:

1) 20 N forward - 15 N backwards = a net force of 5 N

  Acceleration: Acceleration = Net Force * Mass ( derived from Force = mass * acceleration).

a = 5 N / 2 kg

a= 2.5 m/s^2

2)

Un equipo de dos corredores ganó una carrera de automóviles a campo traviesa. Casa conductor de estuvo al volante la mitad del recorrido. Si uno corrió a 60 km/h en promedio y el otro a 20 km/h, también en promedio, ¿Cuál fue la rapidez media general si la distancia total recorrida fue de 600km?

Answers

Answer:

La rapidez media general fue 30 km/h.

Explanation:

Para encontar la rapidez media debemos hallar el tiempo que tarda cada uno en recorrer 300 km (cad uno recorre la mitad del recorrido total que es 600m):

[tex] t_{1} = \frac{1 h}{60 km}*300 km = 5 h [/tex]

[tex] t_{2} = \frac{1 h}{20 km}*300 km = 15 h [/tex]                              

[tex]t_{T} = t_{1} + t_{2} = 5 h + 15 h = 20 h[/tex]

Entonces, la rapidez media es:                    

[tex]v = \frac{\Delta x}{\Delta t} = \frac{600 km}{20 h} = 30 km/h[/tex]

Por lo tanto, la rapidez media general fue 30 km/h.

Espero que te sea de utilidad!                  

Why are body senses in psychology?

Answers

Answer: Body senses provide you with information about the position of your body in respect to your environment. The four main ones are touch, pain, vestibular, and kinesthesis.

More in details:

Our senses allow us to experience the world we live in, and are one of the key components of consciousness. ... This is why the study of our senses, or sensation, is considered to be such an important area of psychology, because it is one of the key components that makes consciousness possible.

Has a definite shape and definite volume. Question 4 options: liquid gas solid

Answers

Answer:

solid

Explanation:

solid

How does the potential and kinetic energy change as the sled moves down the slope?

Answers

Answer:

KE increases and PE decreases.

Explanation:

First, note that the formula for kinetic energy is KE = (1/2)mv^2 where m is the mass and v is the velocity and the formula for potential energy is PE = mgh where h is the height it is at. Since mass and the acceleration provided by gravity doesn’t change, we can disclude that our conclusion. We know that the height (h) and velocity (v) does change, so let’s look at that. As you continue down the slope, you accelerate due to gravity. Thus, velocity increases and KE increases. As you continue down the slope, you get closer to the ground, hence h decreases and PE decreases.

I hope this helped! :)

Which part of an organism is preserved in cast and mild fossils

Answers

Answer:

Isn't it technically your brain? Because it's always in your skull and when you're younger you have cracks in your skull but as you grow, your skull fossilizes to mend those cracks. IT FOSSILIZES!

Explanation:

How do the echoes of the sounds of animals help them?

Answers

animals like bats and whales use something called echolocation (sounds or echoes that travel to the other animal) these echoes can let one animal let another one know that danger is near or that food is nearby etc it's like a telephone line

Answer:

Echolocating animals emit calls out to the environment and listen to the echoes of those calls that return from various objects near them. They use these echoes to locate and identify the objects. Echolocation is used for navigation, foraging, and hunting in various environments.

How would the future of the universe differ from the past?

Answers

Everything would be more advanced and logical while the past people really just tried to survive.

a 5 kg rock is lifted 3m find amount of work done

a= 98 J

Answers

Answer:

How long would it take a machine to do 13,000 joules of work if the power rating ... An object gains 15 joules of potential energy as it is lifted vertically 5.0 meters. ... As the time required to do a given quantity of work decreases, the power ... How much work is being done to the system by the person of the sled moves 10 m?

Which statement BEST describes the process of playing sports?

A. No pain, no gain.
B. Rules are meant to be broken as long as nobody gets hurt.
C. You should understand the risks of each sport and listen to your body.
D. none of the above

Please select the best answer from the choices provided.

Answers

Answer:

option A because in sport pain makes a player strongest.......

Answer: Choice C: You should understand the risks of each sport and listen to your body.

Explanation: The statement that BEST describes the process of playing sports is C. You should understand the risks of each sport and listen to your body. It’s important to be aware of the potential risks associated with each sport and to pay attention to your body’s signals to avoid injury.

A book is sitting on a table. Jackie is pushing the book with a force of 9 N to the right. If the force of friction is 4 N to the left, what is the net force?
5 N right
4 N right
4 N left
5 N left

Answers

Answer:

5 N right

Explanation:

Fx = 9N-4N

Fx = 5N

Since we can define the x and y axis. We have x to the right as positive.

A car is accelerating to the right. In which direction is the applied force?
right
left
up
down

Answers

Answer:

Left

Explanation:

The force is applied opposite of the acceleration.

1. A 12 kg dog is running 5 m/s. How much kinetic energy does the dog have?
2. Another dog is also running at 5 m/s, but this one has 100 Joules of kinetic energy. What is this dog's mass?

Answers

Answer:

1.

2.

Explanation:

1. KE = 1/2mv^2

= 1/2 (12)×5^2

= 6× 25

KE = 150j

2. KE = 1/2 mv^2

100j = 1/2m(5)^2

2(100j) = m×25

m = 200÷ 25

m = 8 kg

hope it helps

The table shows the diameter of four different types of electric wire....

Answers

Answer:

it is the fourth one!

Explanation:

i just did it on ap3x :)

The resistance of a wire which is used to power clothes dryer rank third as the area and diameter of wire is inversely proportional to the resistance of the wire. Thus, the correct option is A.

What is Electrical resistance?

Electrical resistance is a measure of the opposition or friction to the current flow in an electrical circuit. Resistance is measured in the unit of ohms, that is symbolized by omega (Ω). Resistance of an electrical wire can be calculated by the formula:

R = (ρ×L)/A

where, R = Resistance of the wire,

ρ = Resistivity or specific resistance,

L = length of the electrical length,

A = Cross-sectional area of the electrical wire.

The resistance of a electrical conductor is dependent on the following factors including the cross-sectional area of the conductor, length of the conductor and the material of the electrical conductor.

Therefore, the correct option is A.

Learn more about Electric wire here:

https://brainly.com/question/14715608

#SPJ2

how much time will it take to perform 440 joule of work at a rare of 11 w?​

Answers

Answer:

40sec

Explanation:

Data

Work = 440 J

Power= 11watt

time = ?

Power = work done/time

===> time = work done/power

= 440/11

= 40sec

Which of the following most likely causes Earth's inner core to be a solid?
A The pressure in the core is very high
B) The metals in the core are very heavy
The temperature of the core is very low
D
The chemicals in the core are very reactive

I NEED HELP QUICKLY THIS IS DUE BY 12:00 PM tonight

Answers

b the metals in the core are very heavy

Find the weight of a 65 kg person​

Answers

Answer:

650N

Explanation:

we're using w=m×g

and gravity on earth is 10N

so it'll be

W=65 (being the mass) × 10

=650N

(explanation for a)

Read the passage. Then write a paragraph that explains why the two ecosystems have such different kinds of plants. Use the terms biotic factor, abiotic factor , and limiting factor in your explanation.

Answers

Answer:search this up but put quizzlet at the end it should be there

Explanation:

the magnification is less than 1 what does it mean​

Answers

If magnification is less than one it means the image is the same exact size as the object.

When the magnification is less than 1 it means that the height of the image formed is less than that of the object.

Magnification:

Magnification is defined as the ratio of the size of the image formed to the ratio of the object.

When an object is examined under a lens or a curved mirror, it produces images described by ray optics based on the position of the object from the lens or the mirror.

The image formed may be of the same size, maybe greater than the object or may be smaller based on the position and distance of the object from the lens.

If the image formed is smaller than the object then, the ratio of the height of the image to the ratio of the height of the object will be less than 1.

Learn more about magnification:

https://brainly.com/question/2548694?referrer=searchResults

a carver begins work on the block or granite that weighs 2700g which has a density of 2.7g/cm^3. What is the volume of the granite?

Answers

Answer:

V = 1000 [cm³]

Explanation:

To solve this type of problem we must apply the definition of density, which is equal to the relationship between mass and volume, in this way it can be easily found by means of the following equation.

[tex]Ro = m/V[/tex]

where:

Ro = density = 2.7 [g/cm³]

m = mass = 2700 [g]

V = volume [cm³]

Now replacing:

[tex]V = m/Ro\\V = 2700/2.7\\V = 1000 [cm^{3} ][/tex]

the acceleration of an object is due to the net force on the object and the objects?

Answers

Answer:

The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object.

what makes an molecule compound

Answers

Explanation:

A molecule is a group two or more atoms held together by chemical bonds.

At which point is cool air circulating beneath warm air?

A. 1

B. 2

C. 3

D. 4

Answers

Answer:

The answer is A

Explanation:

I took the quiz

The point where the cool air circulated beneath warm air is option A. 1

Cool air circulation:

Cold air should be entered from the left and movement should be down. It can't be clouded with the rain.  The entering of the warm air should not be from the right and moved up. Neither the warm air should be entered from the top left and then moved down with respect to the clouds. In this way, the point of the cool air circulation should be one.

Learn more about the air here: https://brainly.com/question/24545963

In calisthenics, the resistance is ultimately provided by __________. A. free weights B. springs and elastic bands C. gravity D. weight machines

Answers

When practicing calisthenics, the athlete's body is the only element that offers resistance. Thus, the resistance is ultimately provided by _gravity_. Option C is correct.

---------------------

Calisthenic is a physical discipline that is based only on the use of body weight.

It is a training system with physical activities that do not require any external element (weights, balls, cord). Gravity is the only force that exerts resistance.

This discipline develops strength, precision, and movement coordination, which are fundamental to increasing the difficulty of the exercises.

The athlete's body is the only element that offers resistance. Thus, the resistance is ultimately provided by _gravity_.

------------------------------

You can learn more about Calisthenic at

https://brainly.com/question/2041419

Answer:

C

Explanation:

Which statement describes how this diagram could be changed so that it shows an electromagnet? so Battery Ammeter


A. Add a magnetic metal core inside the coil of wire
B. Add magnetic field lines around the wire coil.
C. Place a second battery between the ammeter and the wire coll.
D. Move the ammeter to the other side of the wire coil.​

Answers

Answer:

It’s A

Explanation:

I just took the test

Answer:

Explanation:a

2 He Helium Which list gives the correct numbers of subatomic particles for a neutral atom of helium? O A. Two protons, two neutrons, four electrons B. Four protons, four neutrons, four electrons O c. Two protons, four neutrons, six electrons O D. Two protons, two neutrons, two electrons​

Answers

Answer:

D

Explanation:

Two protons, two Neutrons, two electrons

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