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
Georgia [21]
3 years ago
12

The girl in the picture is at the highest point in swinging and starts to come down. Which statement could describe the changes

in energy for her?
(1 point)

A) Potential energy is increasing, and kinetic energy is decreasing.

B) Kinetic energy is increasing, and potential energy is decreasing.

C) Kinetic and potential energy are increasing.

D) Kinetic and potential energy are decreasing.

2. Earth is closest to the sun around January 3 each year, and it is farthest from the sun near July 4. Around which date would Earth be moving the slowest as it orbits the sun? (1 point)

A) October 3

B) April 4

C) July 4

D) January 3

3.At which of the three points, if any, is the bicyclist’s potential energy increasing?

(1 point)

A)The potential energy is increasing at point C because the bicyclist is increasing in elevation at that point.

B)The potential energy is increasing at point A because the bicyclist is moving fastest at that point.

C)The potential energy is always decreasing because the bicyclist continues to move forward.
D)The potential energy is increasing at point B because the bicyclist is highest there

4.How would potential energy and kinetic energy change going down stairs one at a time or two at a time?(1 point)

A) Going down stairs two at a time means you will get down in fewer steps, which saves you some kinetic and potential energy.

B) If you go down stairs two at a time, then you are going a greater distance, which will decrease your potential energy. Your kinetic energy will be less when you land on the stair.

C) Going down stairs two at a time will give you twice as much kinetic energy by the time you reach the bottom stair.

D)If you go down stairs two at a time, then your potential energy relative to the stair is greater. Your kinetic energy will be greater when you land.
Chemistry
2 answers:
vredina [299]3 years ago
5 0

Answer:

1.(A)  2.(A)    3.(C)   4.(D)

Explanation:

strojnjashka [21]3 years ago
4 0

Answer:

1) Kinetic energy is increasing, and potential energy is decreasing.

2) July 4th

3) The potential energy is increasing at point C because the bicyclist is increasing in elevation at that point.

4) If you go down stairs two at a time, then your potential energy relative tot he stair is greater. Your kinetic energy will be greater when you land.

Explanation:

Hope this helps!

You might be interested in
A radioactive material, with half-life of six months, has 100 thousand unstable nuclei.
goldfiish [28.3K]

Answer:

See Explanation

Explanation:

Given that;

N/No = (1/2)^t/t1/2

Where;

No = amount of radioactive isotope originally present

N = A mount of radioactive isotope present at time t

t = time taken

t1/2 = half life

N/1000=(1/2)^3/6

N/1000=(1/2)^0.5

N = (1/2)^0.5 * 1000

N= 707 unstable nuclei

Since the value of the initial activity of the radioactive material was not given, the activity of the radioactive material after three months is given by;

Decay constant = 0.693/t1/2 = 0.693/6 months = 0.1155 month^-1

Hence;

A=Aoe^-kt

Where;

A = Activity after a time t

Ao = initial activity

k = decay constant

t = time taken

A = Aoe^-3 *0.1155

A=Aoe^-0.3465

3 0
3 years ago
Balancing chemical equations
mojhsa [17]

<span>2H2 + O2 → 2H2O</span>

<span>
</span>

<span>okay???</span>

<span>
</span>

4 0
3 years ago
PLEASE ANSWER I GIVE BRAINLIEST AND MAX POINTS
d1i1m1o1n [39]

Answer:

I believe the answer is A (changes in air temperature  result in differences in air pressure which causes wind). Hope this helps

Explanation:

7 0
3 years ago
5 points<br> What is the name of the atom pictured here? Use a periodic table if<br> needed. *
photoshop1234 [79]

Answer:

There is nothing attached to this question so I unfortunately cannot help you

Explanation:

3 0
3 years ago
Which change does an increase in heat energy cause?
Bumek [7]

Answer:

C more collision between molecules

Explanation:

increase in heat causes increase in kinetic energy of the particles

5 0
2 years ago
Other questions:
  • In a spontaneous reaction -
    7·1 answer
  • The molar solubility for baco3 is 9.0 x 10-5 m at 25 degrees
    10·1 answer
  • Darwin developed the theory of evolution to explain why there are so many different kinds of living things. He could easily obse
    14·2 answers
  • what is the daughter nucleus (nuclide) produces when 64^Cu undergoes beta decay by emitting an electron? replace ? ? ?
    5·1 answer
  • Which phrase describes the charge and mass of a neutron? 1. a charge of +1 and no mass 2. a charge of +1 and an approximate mass
    8·2 answers
  • Never mind i got it hahahaha
    10·2 answers
  • Which of the following is a reduction half-reaction?
    11·1 answer
  • if an unknown gas has one third the root mean squarevspeed of H2 at 300 K, what is the molar mass of the gas?​
    10·1 answer
  • Calculate h30+ for a 8.86*10^3 hbr solution
    13·1 answer
  • 5. A 5.00 g sample of an unknown substance was heated from 25.2 C to 55.1 degrees * C , and it required 133 to do so. Identify t
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!