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
kodGreya [7K]
3 years ago
5

How much time does it take to use 300 W of power to do 1800 J of work? Round your answer to the nearest whole number. The time i

s s.
Physics
2 answers:
Ksenya-84 [330]3 years ago
6 0

Answer:

It takes 6 seconds

Explanation:

Power is the rate of doing work. Power used or dissipated can be calculated as the relationship between the work done and the time it took to do it. That's why its units are also J/s.

Mathematically:

Power=\frac{Work}{time}

In this case, we know about the Power and the work done, so we can calculate the time it took. Solving for time:

time=\frac{Work}{Power}

Plugging in the values:

time=\frac{1800J}{300J/s}\\time=6s

patriot [66]3 years ago
4 0
Energy = power × time
1800 = 300 × time
time = 1800 ÷ 300 = 6 s

Hope it helped!
You might be interested in
According to cell theory which of the following is not true?
Anettt [7]

Answer:

first one

Explanation:

4 0
3 years ago
Read 2 more answers
143°C = _____<br><br> 416 K<br> -130 K<br> 0 K<br> 143 K
dezoksy [38]
The answer is 0k because 143c equals nothing
5 0
2 years ago
Read 2 more answers
BRAINLEST FOR CORRECT ANSWER PLEASE
Nata [24]

Answer:

Sledgehammer A has more momentum

Explanation:

Given:

Mass of Sledgehammer A = 3 Kg

Swing speed = 1.5 m/s

Mass of Sledgehammer B = 4 Kg

Swing speed = 0.9 m/s

Find:

More momentum

Computation:

Momentum = mv

Momentum sledgehammer A = 3 x 1.5

Momentum sledgehammer A = 4.5 kg⋅m/s

Momentum sledgehammer B = 4 x 0.9

Momentum sledgehammer B = 3.6 kg⋅m/s

Sledgehammer A has more momentum

5 0
3 years ago
Fighter jet starting from airbase A flies 300 km east , then 350 km at 30° west of north and then 150km north to arrive finally
Tems11 [23]
A jet fighter flies from the airbase A 300 km East to the point M. Then 350 km at 30° West of North.
It means : at 60° North of West. So the distance from the final point to the line AM is :
350 · cos 60° = 350 · 0.866 = 303.1 km
Let`s assume that there is a line N on AM.
AN = 125 km and NM = 175 km.
And finally jet fighter flies 150 km North to arrive at airbase B.
NB = 303.1 + 150 = 453.1 km
Then we can use the Pythagorean theorem.
d ( AB ) = √(453.1² + 125²) = √(205,299.61 + 15,625) = 470 km
Also foe a direction: cos α = 125 / 470 = 0.266
α = cos^(-1) 0.266 = 74.6°
90° - 74.6° = 15.4°
Answer: The distance between the airbase A and B is 470 km.
Direction is : 15.4° East from the North. 
4 0
3 years ago
A bike rider pedals with constant acceleration to reach a velocity of 7.8 m/s over a time of 4.2 s. during the period of acceler
Artyom0805 [142]

To calculate the initial velocity of the bike, we use the following equation

d=\frac{1}{2} (u+v)t.

or

u=\frac{2d}{t} -v

Here, u is initial velocity, v is final velocity, t is the time and d is the distance covered by bike.

Given, u =7.8 m/s,d= 19 m and t=4.2 s.

Substituting these values in above equation, we get

u = \frac{2 \times 19}{4.2 \ s} -7.8 m/s = 9.05 \ m/s - 7.8 \ m/s \\\\ u= 1.2 m/s.

Thus, the initial velocity of the bike is 1.2 m/s.

3 0
3 years ago
Other questions:
  • Kyle, a 80.0 kg football player, leaps straight up into the air (with no horizontal velocity) to catch a pass. He catches the 0.
    11·2 answers
  • If you were to drop an egg on concrete would it crack it
    6·2 answers
  • In fig. 30.11, suppose that and with switch open, switch is left closed until a constant current is established. then is closed
    14·1 answer
  • A mass of 9.2 kg is accelerated at 2.1 m/s2. What is the force?
    11·1 answer
  • Two sources of light of wavelength 686 nm are separated by a horizontal distance x. They are 3 m from a vertical slit of width 0
    8·1 answer
  • A runner taking part in the 200 m dash must run around the end of a track that has a circular arc with a radius of curvature of
    8·1 answer
  • Explain why a law is accepted as fact, but a theory is not
    9·2 answers
  • The safe load for a certain horizontal beam used to hold up part of a building varies inversely as the length between the suppor
    12·1 answer
  • What are the importance of gravitation
    14·2 answers
  • How is the levitation of the SCMagLev train achieved? Just write a sentence.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!