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
Aleksandr [31]
2 years ago
11

What is the amount of work done in a certain amount of time known as?

Physics
1 answer:
lyudmila [28]2 years ago
4 0
Power is a rate at which work is done, or energy is used. It is equal to the amount ofwork done divided by the time it takes to dothe work. The unit of power is the Watt (W), which is equal to a Joule per second (J/s)
You might be interested in
How many outer-orbital electrons are found in an atom of:a) Na?b) P?c) Br?d) I?e) Te?f) Sr?
lys-0071 [83]

Answer:

  1. Na=1
  2. P=5
  3. Br=7
  4. I=7
  5. Te=6
  6. Sr=2

6 0
1 year ago
What is the minimal mass of helium (density 0.18 kg/m3) needed to lift a balloon carrying two people in a basket, if the total m
Sergio039 [100]

Answer:   
 M[min] = M[basket+people+ balloon, not gas] * ΔR/R[b] 
 Î”R is the difference in density between the gas inside and surrounding the balloon. 
 R[b] is the density of gas inside the baloon.   
 ==================================== 
 Let V be the volume of helium required. 
 Upthrust on helium = Weight of the volume of air displaced = Density of air * g * Volume of helium = 1.225 * g * V   
 U = 1.225gV newtons 
 ---- 
 Weight of Helium = Volume of Helium * Density of Helium * g 
 W[h] = 0.18gV N   
 Net Upward force produced by helium, F = Upthrust - Weight = (1.225-0.18) gV = 1.045gV N  -----

 
 Weight of 260kg = 2549.7 N 
 Then to lift the whole thing, F > 2549.7 
 So minimal F would be 2549.7 
 ---- 
 1.045gV = 2549.7 
 V = 248.8 m^3   
 Mass of helium required = V * Density of Helium = 248.8 * 0.18 = 44.8kg (3sf)   
 =====   
 Let the density of the surroundings be R 
 Then U-W = (1-0.9)RgV = 0.1RgV   
 So 0.1RgV = 2549.7 N 
 V = 2549.7 / 0.1Rg   
 Assuming that R is again 1.255, V = 2071.7 m^3 
 Then mass of hot air required = 230.2 * 0.9R = 2340 kg   
 Notice from this that M = 2549.7/0.9Rg * 0.1R so   
 M[min] = Weight of basket * (difference in density between balloon's gas and surroundings / density of gas in balloon)   
 M[min] = M[basket] * ΔR/R[b]
3 0
3 years ago
In the first direct detection of gravitational waves by LIGO in 2015, the waves came from A. the collapse of a nearby star into
diamong [38]

In the first direct detection of gravitational waves by LIGO in 2015, the waves came from the merger of two black holes. Option B is correct. This is further explained below.

<h3>What are gravitational waves?</h3>

A gravitational wave is simply defined as a ripple in space that is unseen though extremely rapid. Gravitational waves move at light speed. As they pass past, these waves compress and stretch everything in their path.

In conclusion, the merger of two black holes is the first direct detection of gravitational waves.

Read more about Wave

brainly.com/question/23271222

#SPJ1

8 0
2 years ago
As objects grow farther apart, what happens to the force of gravity between them?
Papessa [141]
It decreses Decreases
8 0
3 years ago
Which benefit outweighs the risks in the technological design of headphones?
Dmitriy789 [7]

Answer:

The Answer is A They can damage hearing.

Explanation:

I took the Test

7 0
3 years ago
Other questions:
  • After a group of researchers conducts a new experiment that has never been conducted before, what is the best way for other scie
    6·2 answers
  • Calculate A, E, μ, cv and S for 1 mole of Kr at 298 K and 1 atm (assuming ideal behavior)
    13·1 answer
  • Explain why an aton is neutral
    11·1 answer
  • Biological factor related to antisocial personality disorder is
    7·2 answers
  • 1. How many grams are in a dekagram?
    7·2 answers
  • In a perfectly inelastic one-dimensional collision between two objects, what condition alone is necessary so that the final kine
    14·2 answers
  • suppose a scientific team is trying to recreate the energy producing reactions that occur in the sun. what would they need for t
    7·1 answer
  • When the Sun is directly overhead, the intensity of sunlight reaching the ground is about 1000 W/m^{2} 2 . The Earth has a radiu
    12·1 answer
  • What part of the Milky Way allows for determination of its rotational direction? A. Celestial body B. Galactic body C. Galactic
    13·2 answers
  • What is the relationship between mass and acceleration on an object when the force is held constant?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!