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
11Alexandr11 [23.1K]
3 years ago
7

A battery of voltage V delivers power P to a resistor of resistance R connected to it. By what factor will the power delivered t

o the resistor change if the following changes are made? Give your answers as a factor of the original power P.(a) The resistance is changed to 2.90R.(b) The voltage of the battery is now 2.90V, but the resistance is R.(c) The resistance is 2.90R and voltage is 2.90V.(d) The resistance is 2.90R and the voltage is V/2.90.
Physics
1 answer:
Anettt [7]3 years ago
4 0

Answer:

Explanation:

Power P = V² / R

a ) The resistance is changed to 2.90R

Power will become 1 / 2.9 times .

b )The voltage of the battery is now 2.90V, but the resistance is R

P = (2.9V)² / R

= 8.41 x V² / R

So power becomes 8.41 times

c )The resistance is 2.90R and voltage is 2.90V

Power P = (2.9V)² / 2.9 R

= 2.9 V²/R

So power becomes 2.9 times

d ) The resistance is 2.90R and the voltage is V/2.90

Power P = ( V/2.90)² x 1 / 2.90R

1 / ( 2.9 )³ x V² / R

= 1 / 24.389 x V² / R

So power becomes  1 / 24.389 times .

You might be interested in
WILL GIVE BRAINLIEST! Briefly describe the three phases of self-regulation.<br> _PSYCHOLOGY_
Zinaida [17]

Phase 1. Forethought/preaction—This phase precedes the actual performance; sets the stage for action; maps out the tasks to minimize the unknown; and helps to develop a positive mindset. Realistic expectations can make the task more appealing. Goals must be set as specific outcomes, arranged in order from short-term to long-term. We have to ask students to consider the following:

<span>When will they start?Where will they do the work?How will they get started?<span>What conditions will help or hinder their learning activities are a part of this phase?
</span></span>

Phase 2. Performance control—This phase involves processes during learning and the active attempt to utilize specific strategies to help a student become more successful.

We have to ask students to consider the following:

<span>Are students accomplishing what they hoped to do?Are they being distracted?Is this taking more time than they thought?Under what conditions do they accomplish the most?What questions can they ask themselves while they are working?<span>How can they encourage themselves to keep working (including self-talk—come on, get your work done so you can watch that television show or read your magazine!)
</span></span>

Phase 3. Self-reflection—This phase involves reflection after the performance, a self-evaluation of outcomes compared to goals.

We have to ask students to consider the following:

<span>Did they accomplish what they planned to do?Were they distracted and how did they get back to work?Did they plan enough time or did they need more time than they thought?<span>Under what conditions did they accomplish the most work. 
Hope this helps!!!!!

</span></span>
6 0
3 years ago
Read 2 more answers
With what speed must you approach a source of sound to observe a 25% change in frequency?
insens350 [35]
Sound source is at rest, you are moving with velocity v, f = frequency, c = speed of sound:

f = f0(1 + v/c)

115 = 100(1 + v/343)
115 = 100 + 100v/343
15 = 100v/343
v = 15*343/100
<span> v = 51,45 m/s </span>
5 0
3 years ago
Standards for all managers ethical responsibilities are covered in a company's?
katen-ka-za [31]

Answer:

C. Code of ethics

Explanation:

The code of ethics of a company is the document where all the values that the members of the company should live and obbey, they are often guideliness on how to act and beheave and how to treat customers, providers and co-workers. IT also has all of the standards for all managers ethical responsabilities, and ethical responsabilities of the general of the employees of the company.

5 0
3 years ago
Read 2 more answers
Which most likely is a causal relationship?
const2013 [10]
Answer: C. Experimenters show a link between adult-onset diabetes and obesity
On the statement above, there is clearly a causal relationship between the adult-onset diabetes and obesity according to researches and experiments. Causal relationship shows that there is one event is the cause while the other is the result. 


3 0
4 years ago
All phase changes are .an example of a phase change is an ice cube melting
masha68 [24]

Answer:

a

Explanation:

a

8 0
3 years ago
Other questions:
  • 1. Why is the theory that all things are made up of atoms a theory and not a fact?
    12·1 answer
  • The tidal bulge on the side of the earth opposite the moon is due to _______ .
    13·2 answers
  • Does specific heat change with mass?
    7·1 answer
  • 7. Mrs. Everhart developed the theory that all bulldogs are great pets. After all her bulldog Meatball is a
    13·1 answer
  • A simple pendulum is used to determine the acceleration due to gravity at the surface of a planet. The pendulum has a length of
    9·1 answer
  • Which of the following soil types is richest in organic material?
    8·2 answers
  • What is the difference in forces and displacement when comparing positive and negative work?
    12·1 answer
  • Which of the following graphs shows the relationship between two variables that obey the inverse square law?​
    12·1 answer
  • A cheetah has an acceleration rate of 5.80 m/s2 . What is the cheetah’s final velocity after 7.80 seconds, if initially, his vel
    11·1 answer
  • The Sloan Digital Sky Survey includes many thousands of galaxies in its spectroscopic catalogs. How are the distances to most of
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!