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
Yakvenalex [24]
2 years ago
12

7. What is the kinetic energy of a 3-kilogram ball that is rolling at 2 meters per second?

Physics
1 answer:
Anestetic [448]2 years ago
4 0

Answer:

6j

Explanation:

3×2=6

j=6

if you multiply 3 by 2 then you get six so then its 6j

You might be interested in
If the humidity in a room of volume 410 m3 at 25 ∘C is 70%, what mass of water can still evaporate from an open pan? Express you
Keith_Richards [23]

Answer:

m=1864.68\ g

Explanation:

Given:

volume of air in the room, V=410\ m^3

temperature of the room, T=25+273=298\ K

<u>Saturation water vapor pressure at any temperature T K is given as:</u>

<u />p_{sw}=\frac{e^{(77.3450 + 0.0057\times T - \frac{ 7235}{T}  )}}{T^{8.2}}<u />

putting T=298 K we have

p_{sw}=3130\ Pa

<u>The no. of moles of water molecules that this volume of air can hold is:</u>

Using Ideal gas law,

P.V=n.R.T

n=\frac{P_{sw}.V}{R.T}

n=\frac{3130\times 410}{8.314\times 298}

n=518\ moles is the maximum capacity of the given volume of air to hold the moisture.

Currently we have 80% of n, so the mass of 20% of n:

m=(20\%\ of\ n)\times M}

where;

M= molecular mass of water

m=0.2\times 518\times 18

m=1864.68\ g is the mass of water that can vaporize further.

3 0
2 years ago
What is the change in electric potential energy when the dipole moment of a molecule changes its orientation with respect to e⃗
AleksandrR [38]

Electric potential energy of a dipole is given as

U = - P.E

U = - PE cos\theta

so change in the potential energy is given by

U_f - U_i = (-PEcos\theta_2)- (-PEcos\theta_1)

\Delta U = PE (cos\theta_1 - cos\theta_2)

here initially it was parallel to electric field while finally it is perpendicular to the electric field

so we have

\Delta U = PE(cos 0 - cos 90)

\Delta U = PE

so above is the change in potential energy of dipole

8 0
3 years ago
2. Keith took a cube and measured the mass and volume of a
galben [10]

Answer:

<h2>6 g/cm³</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question

mass = 36 g

volume = 6 cm³

We have

density =  \frac{36}{6}  = 6 \\

We have the final answer as

<h3>6 g/cm³</h3>

Hope this helps you

7 0
2 years ago
A vertical spring launcher is attached to the top of a block and a ball is placed in the launcher, as shown in the figure. While
kvasek [131]

For a vertical spring launcher is attached to the top of a block and a ball is placed in the launcher, the position of the ball will be  behind the box

<h3>What will be the position of the ball relative to the spring launcher?</h3>

Generally, the equation for the  conservation of momentum principle  is mathematically given as

(M+m) V1 = M*V2

Therefore, with the ball moving forward we have that; the ball at top it wii be behind the box,

Read more about Motion

brainly.com/question/605631

7 0
2 years ago
The diagram shows the molecular structure of propane. What is the chemical
ad-work [718]

Answer:

B

Explanation:

Took the test

6 0
2 years ago
Read 2 more answers
Other questions:
  • Speed is a component of skill related fitness what does speed enable you to do.
    13·1 answer
  • A string is attached to the rear-view mirror of a car. A ball is hanging at the other end of the string. The car is driving arou
    6·1 answer
  • During a baseball game, a baseball is struck at ground level by a batter. The ball leaves the baseball bat with an initial veloc
    6·1 answer
  • A hockey puck on a frozen pond with an initial speed of 13.7 m/s stops after sliding a distance of 216.9 m. Calculate the averag
    6·1 answer
  • What type of thermodynamic system is best to use to describe an operating automobile engine? A) Open O B) Dilated O C) Isolated
    8·1 answer
  • I love u whoosever seeing my question​
    13·1 answer
  • What wavelength would a ripple in water have if the frequency is 1.8 Hz and a
    12·2 answers
  • With an initial velocity of 20km per hour a car accelerated at 8m/s2 for 10s,what is the position of the car at the end of 10s
    7·1 answer
  • The mass of the Sun is 1. 99 × 1030 kg. Jupiter is 7. 79 × 108 km away from the Sun and has a mass of 1. 90 × 1027 kg. The gravi
    13·1 answer
  • A transverse mechanical wave is traveling along a string lying along the x-axis. The displacement of the string as a function of
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!