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
vlada-n [284]
3 years ago
12

4. A spring is stretched 0.5 m from equilibrium. The force constant (k) of the

Physics
2 answers:
makkiz [27]3 years ago
8 0

Answer:

31.25

Explanation:

The formula for the potential energy of a spring is \frac{1}{2}kx^2, where x is the distance in meters the spring is stretched. Plugging in the numbers that you are given, you get \frac{1}{2}\cdot 250\cdot 0.25=31.25. Hope this helps!

hodyreva [135]3 years ago
8 0
31.25 hope this helps:)
You might be interested in
Heat is extracted from a certain quantity of steam at
vodomira [7]

Answer:v=2452.91 m/s

Explanation:

Given

initially steam is at 100^{\circ}C and converted to 0^{\circ} C ice

Let m be the mass of steam

latent heat of fusion and vaporization for water is

L_f=3.33\times 10^5 J/kg

L_v=2.26\times 10^6 J/kg

Heat required to convert steam in to water at 100^{\circ}C

Q_1=m\times L_v=m\cdot 2.26\times 10^6 J

Heat required to lower water temperature to 0^{\circ}C

Q_2=m\times c\times \Delta T

Q_2=m\times 4.184\times (100)

Q_2=4.184m\times 10^5 J

Heat required to convert 0^{\circ}C water to ice at 0^{\circ}C is

Q_3=m\times L_f

Q_3=m\times 3.33\times 10^5=3.33m\times 10^5 J

Q=Q_1+Q_2+Q_3

Q=(2.26+0.4184+0.33)m\times 10^6 J

Q=3.0084m\times 10^6 J

So this energy is equal to kinetic energy of  bullet of mass m moving with velocity v

Q=\frac{1}{2}mv^2

3.0084m\times 10^6=\frac{1}{2}mv^2

v^2=3.0084\times 2\times 10^6

v=2.452\times 10^3 m/s

v=2452.91 m/s  

5 0
4 years ago
What is velocity?<br>Please don't answer and let joinbrainly answer. Thank you. ​
Leokris [45]

Answer:

the speed of something in a given direction

Explanation:

mark me brainliest plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

7 0
3 years ago
Read 2 more answers
A light-year is the distance that light travels in one year. The speed of light is 3.00 × 108 m/s. How many miles are there in o
Alinara [238K]

Answer:

(a) 5.88\times 10^{12}mi

Explanation:

We have given speed of light c=3\times 10^8m/sec

Given time = 1 year =365 days

We know that in 1 minute = 60 sec

1 hour = 60×60 = 3600 sec

In one day = 24 hour = 24×60×60=86400 sec

So in 365 days = 365×86400=3.1536\times 10^7sec

We know that distance = speed ×time=3.1536\times 10^7\times 3\times 10^8=9.46\times 10^{15}m

We have given that 1 mi = 1609 m

So 9.46\times 10^{15}m=\frac{9.46\times 10^{15}}{1609}=5.88\times 10^{12}miSo option (a) is correct

8 0
3 years ago
Which of these would best define sound intensity? A) how fast the wave is traveling B) the frequency of the sound wave the power
faust18 [17]

Which of these would best define sound intensity?

A) how fast the wave is travelling

<u>B) the frequency of the sound wave the power of the sound wave per unit area the mass of the wave divided by its volume</u>

5 0
4 years ago
Read 2 more answers
Which of the following uses a heat sink?
julia-pushkina [17]

Answer:

Heat sink is a heat exchanger used to transfer heat generated by a mechanical or an electronic device to the surroundings. Heat sinks are either made up of aluminium or copper or any other material which is good conductor of heat. Because conductor helps in conduction of heat from heated surface to the outside air.

3 0
3 years ago
Other questions:
  • A student who weighs 500N climbed the stairs from the first floor to the third floor, 15m above, in 20s. What was her power? *
    15·1 answer
  • The greater the mass of an object, the more __________ needed to move it.
    12·2 answers
  • A published hypothesis:
    13·1 answer
  • When I stand halfway between two speakers, with one on my left and one on my right, a musical note from the speakers gives me co
    12·1 answer
  • Explain the meaning of the name "black hole". This should be 2-3 sentences. Hint- relate this to density and how it effects thin
    5·1 answer
  • More than half of Turkey’s population lives along the country’s coastal plains because
    13·2 answers
  • Do sound waves must have a medium to travel but elctromagnetic waves cannot
    10·1 answer
  • On December 26, 2004, a massive Tsunami originated in the Indian Ocean and caused destruction in different parts of the world. W
    12·1 answer
  • __________ theory argues that city growth is generated by the pressure from the city center to expand outward. Expansion threate
    11·2 answers
  • What is a nebula made from?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!