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
madreJ [45]
3 years ago
9

An athlete stretches a spring an extra 40.0 cm beyond its initial length. How much energy has he transferred to the spring, if t

he spring constant is 52.9 N/cm?
a) 4230 kJ
b) 4230 J
c) 423 kJ
d) 423 J
Physics
1 answer:
notsponge [240]3 years ago
4 0

Answer:

<h2>b) 4230 J </h2>

Explanation:

Step one:

given data

extension= 40cm

Spring constant K= 52.9N/cm

Step two:

Required

the Kinetic Energy KE

the expression to find the kinetic energy is

KE= 1/2ke^2

substituting our data we have

KE= 1/2*52.9*40^2

KE=0.5*52.9*1600

KE= 42320Joules

<u>The answer is b) 4230 J </u>

You might be interested in
A need the answers pleaseeeee
IRISSAK [1]

It's just asking you to sit down and COUNT the little squares in each sector.

It'll help you keep everything straight if you take a very sharp pencil and make a tiny dot in each square as you count it.  That way, you'll be able to see which ones you haven't counted yet, and also you won't count a square twice when you see that it already has a dot in it.

(If, by some chance, this is a picture of the orbit of a planet revolving around the sun ... as I think it might be ... then you should find that both sectors jhave the same number of squares.)  

7 0
3 years ago
I left a location by 6:38am and arrived a new location by 6: 58am. How do I calculate the time spent?
jolli1 [7]

Answer:20 minutes

Explanation:

06:58am - 06:38am =20 minutes

6 0
3 years ago
Read 2 more answers
A camera is equipped with a lens with a focal length of 34 cm. When an object 2.4 m (240 cm) away is being photographed, what is
puteri [66]

Answer:

The magnification is -6.05.

Explanation:

Given that,

Focal length = 34 cm

Distance of the image =2.4 m = 240 cm

We need to calculate the distance of the object

\dfrac{1}{u}+\dfrac{1}{v}=\dfrac{1}{f}

Where, u = distance of the object

v = distance of the image

f = focal length

Put the value into the formula

\dfrac{1}{u}=\dfrac{1}{34}-\dfrac{1}{240}

\dfrac{1}{u}=\dfrac{103}{4080}

u =\dfrac{4080}{103}

The magnification is

m = \dfrac{-v}{u}

m=\dfrac{-240\times103}{4080}

m = -6.05

Hence, The magnification is -6.05.

6 0
3 years ago
A boat having stones floats in water. If stones are unloaded in water, what will happen to the level of water?​
Pani-rosa [81]

Explanation:

If the stones are unloaded from the boat, the weight of the boat will decrease. Therefore, the volume of the water displaced by the boat will also decrease. Due to this, the volume of the boat immersed in the water decreases. Hence, the level of the water around the boat will decrease.

5 0
3 years ago
How many amps of current are there in a system with 12 volts and 6 ohms?
Gemiola [76]
V = IR
I = V/R
I = 12/6
I = 2 amps
7 0
3 years ago
Read 2 more answers
Other questions:
  • Which mixtures could be separated using evaporation? Check all that apply. fat in milk salt in ocean water mud in pond water but
    9·2 answers
  • I need help!!! 60 POINTS!!!!
    13·2 answers
  • What equation would you use to find the time taken for an object to travel a set distance?
    13·1 answer
  • According to the octet rule, an atom with two electron shells is most stable when it contains eight
    8·1 answer
  • What is cos(6)?<br><br> A. 0.99<br> B. 0.60<br> C. 0.10<br> D. 0.06
    5·2 answers
  • HELP PLEASE!!!!!!!!!!!!!!!
    7·1 answer
  • Shrill sound is of -------------- *
    11·1 answer
  • Two asteroids collide while traveling at constant velocities. Ignoring their gravitational attraction to each other, the forces
    5·1 answer
  • A rubber ball and a steel ball are dropped from the same height onto a concrete floor. They have the same mass, and lets assume
    8·1 answer
  • A body starts moving from rest and attends the acceleration of 0.5m/s². calculate the velocity at the end of 3 minutes also find
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!