1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
BARSIC [14]
3 years ago
6

Jordan wants to know the difference between using a 60-W and 100-W lightbulb in her lamp. She calculates the energy it would tak

e to use each bulb for 30 s by using this equation:
Power = Energy transferred (J)/time (s)

What is the difference in the amount of energy transferred by the two bulbs during this time?

A. 40 J
B. 1200 J
C. 1800 J
D. 3000 J
Physics
1 answer:
Vladimir79 [104]3 years ago
8 0

Answer:

B. 1200 J

Explanation:

Hello.

In this case, given the powers, we compute the energy transferred as shown below:

E=P*t\\\\E_1=60J/s*30s=1800J\\\\E_2=100J/s*30s=3000J\\\\Difference=3000J-1800J\\\\Difference=1200J

Therefore, answer is B. 1200 J .

Best regards.

You might be interested in
What comes before Action-reaction?
Anarel [89]

These two forces are called action and reaction forces and are the subject of Newton's third law of motion. Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects.

4 0
3 years ago
What is the resistance of a 15 ampere current with 8 volts of potential difference?
Alex Ar [27]

Answer:

Resistance in circuit = 0.53 ohm (Approx.)

Explanation:

Given:

Flow of current in circuit = 15 amp

Potential difference = 8 Volts

Find:

Resistance in circuit

Computation:

In an electrical system, resistance is a stopper of a material to electric current.

Resistance in circuit = Potential difference / Flow of current in circuit

Resistance in circuit = 8 / 15

Resistance in circuit = 0.53 ohm (Approx.)

8 0
3 years ago
A watermelon is thrown down from a skyscraper with a speed of 7.0\,\dfrac{\text m}{\text s}7.0 s m ​ 7, point, 0, space, start f
Degger [83]

Answer:

y = 17,89 m

Explanation:

Let us fixate the reference point in top of the building, from where the watermelon is thrown down. We will assume also that the positive axis of our system points up. We describe the watermelon’s motion with the equation:

 v_y^2 =v_0^2 + 2ay

Clearing the equation so we isolate y we have that:

 y = (v_y^2 - v_0^2 )/2a

Making a substitution with the values from the statement we have:

y = ((20 m/s)^2 - (7 m/s)^2)/(2*9,81 m/s^2) = 17,89 m]

So, this skyscraper is about 17,89 m tall; which is not very tall for a skyscraper but who am I to judge.  17,89 m is also the displacement of the watermelon from the point it was thrown down.

I hope everything was clear with my explanation. If I can help with anything else, just let me know. Have an awesome day :D

7 0
3 years ago
Read 2 more answers
What is conserved when two objects collide in a closed system?
elena55 [62]
The answer is B. momentum
5 0
3 years ago
Read 2 more answers
Neutrons have a_____charge.
vlada-n [284]

Answer:

neutral charge ______________

3 0
3 years ago
Read 2 more answers
Other questions:
  • a. A lifted parcel of air will be colder (heavier) that the air surrounding it. Because of this fact, the lifted parcel will ten
    5·1 answer
  • What is the resultant velocity of a plane that is traveled at 245m/s, north and encounters a tailwind of 55m/s?
    8·1 answer
  • A train moves at constant velocity of 50km/h. how far will it move in 0.5h?
    11·1 answer
  • A proton (charge +e, mass mp), a deuteron (charge +e, mass 2mp), and an alpha particle (charge +2e, mass 4mp) are accelerated fr
    14·1 answer
  • Two boxers are fighting. Boxer 1 throws his 5 kg fist at boxer 2 with a speed of 9 m/s.
    10·1 answer
  • A 90.0kg person stands 1.25m from a 60.0kg person sitting on a bench nearby. What is the magnitude of the gravitational force be
    5·1 answer
  • A bicycle traveled 150 meters west from point A to point B. Then it took the same route and came back to point A. It took a tota
    8·1 answer
  • Which of the following is a conversion from light energy to chemical energy?
    15·2 answers
  • If matter cannot be created nor destroyed where did the matter in the univerce com from ???????
    13·1 answer
  • If an airplane were traveling eastward with a thrust force 450 N and there was a tailwind of 200 N, what would the resulting net
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!