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
ira [324]
3 years ago
6

When one does twice the work in twice the time, the power expended is

Physics
1 answer:
devlian [24]3 years ago
8 0

Answer:

the same.

hope this helps!

You might be interested in
If cooling occurred at the bottom of a lake instead of its surface, the lake
AlladinOne [14]
No because the top has more oxygen to it which will break the particles up and have them freeze easier.

so if something froze at the bottom of the lake it would float to the top and that's why water always freezes from the top down :))
5 0
3 years ago
Read 2 more answers
Plssss help Do you guys have any other more interesting, funny or creative ideas of incline problems than something sliding down
VashaNatasha [74]
U can always just do the classic roller coaster going up an incline and create some sort of story from that.
8 0
3 years ago
A 10 kg ball strikes a wall with a velocity of 3 m/s to the left. The ball bounces off with a velocity of 3 m/s to the right. If
lord [1]

Answer:

The force is 272.73 newtons

Explanation:

We're going to use impulse-momentum theorem that states impulse is the change on the linear momentum this is:

\overrightarrow{J}=\overrightarrow{p}_{f}-\overrightarrow{p}_{i} (1)

Impulse is also defined as average force times the time the force is applied:

\overrightarrow{J}=\overrightarrow{F}_{avg}(\varDelta t) (2)

By (2) on (1):

\overrightarrow{F}_{avg}(\varDelta t)= \overrightarrow{p}_{f}-\overrightarrow{p}_{i}

solving for \overrightarrow{F}_{avg}:

\overrightarrow{F}_{avg}=\frac{\overrightarrow{p}_{f}-\overrightarrow{p}_{i}}{\varDelta t} (3)

We already know Δt is equal to 0.22 s, all we should do now is to find \overrightarrow{p}_{f}-\overrightarrow{p}_{i} and put on (3) (\overrightarrow{p_{i}} the initial momentum and \overrightarrow{p_{f}} the final momentum). Linear momentum is defined as \overrightarrow{p}=m\overrightarrow{v} , using that on (3):

\varDelta\overrightarrow{p}=m \overrightarrow{v_{f}}-m \overrightarrow{v_{i}} (4)

Velocity (v) are vectors so direction matters, if positive direction is the right direction and negative direction left \overrightarrow{v_{i}}=+3\, \frac{m}{s} and \overrightarrow{v_{f}}=-3\, \frac{m}{s} so (4) becomes:

\varDelta\overrightarrow{p}=m(-3\frac{m}{s}- (+3\frac{m}{s}))=-(10kg)(6\frac{m}{s})

\varDelta\overrightarrow{p}=-60\, \frac{mkg}{s} (5)

Using (5) on (3):

\overrightarrow{F}_{avg}=\frac{-60\, \frac{mkg}{s}}{0.22s}

F_{avg}=272.73N

8 0
4 years ago
The measure of an angle is 4y°. Find the measure of its supplement. A) (180 + 4y)° B) (180 - 4y)° C) (90 + 4y)° D) (90 - 4y)°
Viefleur [7K]
Answer:  [B]:  " (180 <span>- 4y)° " .
_______________________________________________________</span>
3 0
3 years ago
Read 2 more answers
Which components are part of all scientific investigations?
mezya [45]

Answer:

Making an observation.

Stating a question.

Formulating a hypothesis.

Conducting an experiment.

Analyzing the data and drawing conclusions.

Explanation:

6 0
3 years ago
Other questions:
  • What is the final velocity of a car that starts at 22 m/s and accelerates at 3.78 m/s for distance of 45 m
    15·1 answer
  • Give examples of plants that can reproduce by vegetative reproduction.​
    9·1 answer
  • What are the factors affect the vapor pressure of a liquid?
    12·1 answer
  • What is ohms law for science
    11·2 answers
  • What are properties of what and there importance
    13·1 answer
  • What is sound reverberation?
    6·1 answer
  • An atom has a _____ charge.<br><br><br> positive<br><br> negative<br><br> neutral
    7·2 answers
  • If 100.0 g of a substance releases 45 kJ of energy as it cools from 13.0°C to –15.0°C, what is the specific heat capacity of the
    15·1 answer
  • Atmospheric pressure at the top of mount everest.
    9·1 answer
  • A simple pendulum has length of 820mm. Calculate the frequency (g = 9.8 ms -2)<br>​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!