Activity that uses 150 calories of energy per day, or 1,000 calories per week, describes __________

River water held behind a dam is a form of ________. group of answer choices

WINSTONCH [101]

Potential energy is present in the river water behind a dam.

<h3>How is potential energy defined?</h3>

Potential energy is a form of stored energy that is dependent on the relationship between different system components.
When a spring is compressed or stretched, its potential energy increases.
If a steel ball is raised above the ground as opposed to falling to the ground, it has more potential energy.
The object's mass, its mass in relation to some reference points, and the gravitational field it is in all affect the potential energy of the object.
Joule is the SI unit of potential energy as a result (J)
As weight and height increase, gravitational potential energy rises.

learn more about Potential energy here

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8 0

2 years ago

An electron is accelerated from rest by a potential difference of 412 V. It then enters a uniform magnetic field of magnitude 18

Salsk061 [2.6K]

Explanation:

Given that,

Potential difference, V = 412 V

Magnitude of magnetic field, B = 188 mT

(a) The potential energy of electron is balanced by its kinetic energy as :

$eV=\dfrac{1}{2}mv^2$

v is speed of the electron

$v=\sqrt{\dfrac{2eV}{m}} \\\\v=\sqrt{\dfrac{2\times 1.6\times 10^{-19}\times 412}{9.1\times 10^{-31}}} \\\\v=1.2\times 10^7\ m/s$

(b) When the charged particle moves in magnetic field, it will move in circular path. The radius of the circular path is given by :

$r=\dfrac{mv}{eB}\\\\r=\dfrac{9.1\times 10^{-31}\times 1.2\times 10^7}{1.6\times 10^{-19}\times 188\times 10^{-3}}\\\\r=3.63\times 10^{-4}\ m$

Hence, this is the required solution.

7 0

3 years ago

How many protons, electrons and nurturing does krypton have NEED HELP ASAP THANK YOU

Assoli18 [71]

Answer:

Krypton – Mass Number – Neutron Number – Kr 2020-11-21 by Nick Connor Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. The chemical symbol for Krypton is Kr.

Atomic Number: 36

Element: Krypton

Element Category: Noble Gas

Symbol: Kr

Explanation:

8 0

2 years ago

Read 2 more answers

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

Sedaia [141]

Blu ! The formula is right THERE, IN the question. All you have to do is plug numbers into it.

The formula: Kinetic Energy = 1/2 m v²

' m ' is 2,000 kg

' v ' is 22 m/s

Now pluggum in:

KE = (1/2) (2,000 kg) (22 m/s)²

KE = (1/2) (2,000 kg) (22 m/s x 22 m/s)

KE = (1/2) (2,000 kg) (484 m²/s²)

I'm <u><em>sure</em></u> you can finish it off from this point, and pick the correct choice.

6 0

3 years ago

11. In a transverse wave that travels through a medium, the molecules of the medium vibrate

Nady [450]

"Transverse" means that <span>the molecules of the medium vibrate
at right angles to the direction in which the wave travels.

</span>

5 0

4 years ago

Activity that uses 150 calories of energy per day, or 1,000 calories per week, describes ___________.