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
3241004551 [841]
2 years ago
8

A 0.5kg ball falls from a building that Is 50m high. how much kinetic energy will it have when it has fallen half way to the gro

und?
Physics
1 answer:
castortr0y [4]2 years ago
4 0
Calculate velocity at halfway to the ground.

vfinal = root 2ad

v = root (2*9.81m/s^2*25)

v = 69.367175234 m/s

Kinetic energy = 1/2mv^2

Kinetic energy = 1/2 * (69.367175234 m/s^s^2

Ek = 2405.9025 Joules
You might be interested in
Which of the following involve an increase in the entropy of the system under consideration? a. melting of a solid b. evaporatio
Mama L [17]

Explanation:

Since, entropy is the measure of degree of randomness. So, more randomly the molecules of a substance are moving more will be its entropy.

  • For example, when a solid melts then it means heat is absorbed by it due to which its molecules have gained energy. As a result, they collide with each other and hence, entropy will increase.
  • Evaporation of a liquid will also cause the liquid to change its state from liquid to gas. This means molecules will go far away from each other leading to an increase in the entropy.
  • Sublimation is a process of conversion of a solid into gaseous phase without going through liquid phase. So, in this case also entropy will increase due to gain in energy by the molecules of a solid.
  • In freezing, molecules of a substance come closer to each other and acquire less energy. Hence, entropy decreases.
  • Mixing is a process of combining two or more substances physically with each other. This leads to increase in entropy of a substance.
  • In separation molecules are separated from each other leading to a decrease in energy. Hence, entropy will also decrease.
  • Diffusion is a process in which molecules are able to rapidly move from one place to another. Hence, entropy increases when diffusion takes place.

Thus, we can conclude that melting of a solid, evaporation of a liquid, sublimation, mixing and diffusion involve an increase in the entropy of the system under consideration.

8 0
3 years ago
25 PTs
Nuetrik [128]
Answer:
They are both wrong!

Liquid oxygen really is a pale blue color.
I’ve seen it.

And they cant say that liquid and solid oxygen is blue which makes the sky blue because they’re not and it doesn’t make up for the color of the sky.

The sky is actually blue because It reflects more light than It can absorb
aka Rayleigh Scattering.

-HOPE THAT HELPED
8 0
3 years ago
The current that flows from and back to the power supply in a parallel circuit is called __________ current.
blagie [28]

Answer:

mainline current

Explanation:

Current that flows from and back to the power supply in a parallel circuit. Fuse. A type of circuit protection device.

6 0
2 years ago
Help
Mama L [17]
<h3><u>Answer;</u></h3>

producing a path for current to flow

<h3><u>Explanation;</u></h3>
  • An AC generator is a device that converts mechanical energy into electrical energy using the principle of electromagnetic induction.
  • <em><u>Slip rings are two hollow rings to which two ends of the armature coil are connected. These rings rotate with the rotation of the coil. They function to  to allow for electrical contact with the brushes.</u></em>
  • Slip rings therefore, provide a means for connecting the rotating armature to an external circuit.
3 0
3 years ago
Read 2 more answers
After asking a question, a scientist can form a(n) , which is an idea that may be proved or disproved by an experiment.
DochEvi [55]

Answer:

When scientists have a question, they form a hypothesis, <em>which</em><em> </em><em>is</em><em> </em><em>an</em><em> </em><em>idea</em><em> </em><em>that</em><em> </em><em>may</em><em> </em><em>be</em><em> </em><em>proved</em><em> </em><em>or</em><em> </em><em>disproved</em><em> </em><em>by</em><em> </em><em>an</em><em> </em><em>experiment</em><em>.</em>

6 0
3 years ago
Read 2 more answers
Other questions:
  • Two tiny particles having charges of +5.00 μC and +7.00 μC are placed along the x-axis. The +5.00-µC particle is at x = 0.00 cm,
    7·1 answer
  • VITI<br> How many electrons are in the third energy level?
    8·1 answer
  • Suppose you are asked to find the amount of time t, in seconds, it takes for the turntable to reach its final rotational speed.
    12·1 answer
  • What is heat of combustion?
    15·1 answer
  • Imagine that Kevin can instantly transport himself between Planet X and Planet Y. Which statement could be said about Kevin in t
    9·2 answers
  • A 1200-kg car is travelling east at a rate of 9 m/s. A 1600-kg truck is travelling south at a rate of 13 m/s. The truck accident
    11·1 answer
  • Which of the following has the highest viscosity? A. corn syrup B. milk C. water D. orange juice
    15·1 answer
  • 15 POINTS PLZ HELP IM ON A TIMER! IM ON EDGE EXAM
    14·2 answers
  • where would the spaceprobe experience the strongest net (or total) gravitional force exerted on it by Earth and Mars
    8·1 answer
  • Hi im in class and i need help!
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!