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
nadya68 [22]
4 years ago
8

Please answer the question below

Physics
1 answer:
scoundrel [369]4 years ago
6 0
The correct answer is B.
In a velocity vs time graph, a line going up means an increase in velocity, or speed, which correlates to positive acceleration. Negative acceleration means slowing down.
You might be interested in
If it requires 7.0 J of work to stretch a particular spring by 1.8 cm from its equilibrium length, how much more work will be re
belka [17]

Answer:

56 J

Explanation:

The following data were obtained from the question:

Energy 1 (E₁) = 7 J

Extention 1 (e₁) = 1.8 cm

Extention 2 (e₂) = 1.8 + 3.6 = 5.4 cm

Energy 2 (E₂) =?

Energy stored in a spring is given by the following equation:

E = ke²

Where E is the energy.

K is the spring constant.

e is the extension.

E = ke²

Divide both side by e²

K = E/e²

Thus,

E₁/e₁² = E₂/e₂²

7/ 1.8² = E₂/ 5.4²

7 / 3.24 = E₂/ 29.16

Cross multiply

3.24 × E₂ = 7 × 29.16

3.24 × E₂ = 204.12

Divide both side by 3.24

E₂ = 204.12 / 3.24

E₂ = 63 J

Thus, the additional energy required can be obtained as follow:

Energy 1 (E₁) = 7 J

Energy 2 (E₂) = 63 J

Additional energy = 63 – 7

Additional energy = 56 J

8 0
3 years ago
When a guitar is tuned to adjust it pitch what is it that is changed?
suter [353]

Answer:

B) Its frequency

Explanation:

  • <u>The pitch of sound heard depends on its frequency of the sound wave. Frequency refers to how fast the sound wave is oscillating. </u>
  • A high frequency sound wave has a high pitch while a low frequency sound wave has a low pitch.
  • The faster the sound wave oscillates the higher the pitch. For instance, a guitar with a big heavy string will vibrate slowly and thus create a low pitch.

3 0
3 years ago
Electric power is to be generated by installing a hydraulic turbine-generator at a site 120 m below the free surface of a large
iogann1982 [59]

Answer:

P = 2234400 Watt

Explanation:

Power generation is given as rate of work done

Here the turbine generator is located at 120 m below the free surface

So here rate of work done is given as rate of potential energy

Power = \frac{dw}{dt}

Power = \frac{mgh}{t}

so we have

Power = (\frac{dm}{dt})gh

now we have

Power = 1900(9.8)(120) = 2234400 Watt

so the power generation potential will be 2234400 Watt

8 0
3 years ago
__________ is a force acting through distance. A. Acceleration B. Work C. Friction D. Power
Tatiana [17]

The answer is probably going the be C. Friction

It is like tranferring energy to another object

Brainliest if it is correct

3 0
3 years ago
Read 2 more answers
You toss a ball straight up with an initial speed of 30m/s. How high does it go, and how long is it in the air (neglecting air r
Brut [27]

Explanation:

Given that,

A ball is tossed straight up with an initial speed of 30 m/s

We need to find the height it will go and the time it takes in the air.

At its maximum height, its final speed, v = 0 and it will move under the action of gravity. Using equation of motion :

v = u +at

Here, a = -g

v = u -gt

i.e. u = gt

t=\dfrac{u}{g}\\\\t=\dfrac{30\ m/s}{9.8\ m/s^2}\\\\t=3.06\ s

So, the time for upward motion is 3.06 seconds. It means that it will in air for 3.06×2 = 6.12 seconds

Let d is the maximum distance covered by it.

d=ut-\dfrac{1}{2}gt^2

Putting all values

d=30(3.06)-\dfrac{1}{2}\times 9.8\times (3.06)^2\\\\d=45.91\ m

Hence, it will go to a height of 45.91 m and it will in the air for 6.12 seconds.

8 0
3 years ago
Other questions:
  • Give an order-of-magnitude estimate for the time in seconds of a year
    7·1 answer
  • Arrange the steps of energy production in the correct order.
    15·2 answers
  • Please help.
    14·2 answers
  • A car goes from 100 m/s to a full stop for in 9.5 seconds. What is the acceleration?
    9·1 answer
  • explain which properties of metals make sterling silver the best material for you to create hammered earrings.
    12·1 answer
  • An Olympic sprinter can go from a state of rest to 11 meters per second in 10 seconds. What is the average acceleration of the s
    8·1 answer
  • 100 J of gravitational potential energy is stored in an object, which is dropped. How much kinetic energy will the object have j
    14·1 answer
  • What substance, if added to the mixture of salt and sand, could be separated from the mixture using a sieve?
    7·1 answer
  • Difference between acceleration due to gravity and gravity​
    12·1 answer
  • 2. What is the pH of ammonia?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!