Physics College
Answers
Answer 1
Answer:
A) 2.1 × 1010 Hz
Explanation:
I think this is the answer you're looking for but it may change depending on mass and charge of electron. Hope this helps :)
Related Questions
One mole (6.02×10^23 atoms) of helium atoms in the gas phase has 3700 J of microscopic kinetic energy at room temperature. Assume that all atoms move with the same speed. The mass of a helium atom is 6.68×10^−27 kg. What is the speed of a helium atom?
Answers
This question involves the concepts of kinetic energy, and rms speed.
The rms speed of helium atom at 5800 K is "1.05 x 10¹⁵ m/s".
We will use the formula of the average kinetic energy of gas molecules to find out the rms speed of the hydrogen atom. rms speed is the root mean square speed of an atom:
[tex]K.E =\frac{1}{2}mv^2\\\\v=\sqrt{\frac{2K.E}{m}}[/tex]
where,
v =rms speed = ?
K.E = Kinetic Energy of Helium atoms = 3700 J
m = mass of hydrogen atom = 6.68 x 10⁻²⁷ kg
Therefore,
[tex]v=\sqrt{\frac{2(3700 J)}{6.68\ x\ 10^{-27}\ kg}}\\[/tex]
v = 1.05 x 10¹⁵ m/s
Learn more about rms speed here:
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Question 5 of 5
What do the arrows in the photograph represent?
Answers
BALANCED FORCES
When two forces acting on an object are equal in size but act in opposite directions, we say that they are balanced forces . a stationary object stays still. ... a moving object continues to move at the same speed and in the same direction.
- BRAINLIEST answerer
What are three kinds of forces that affect an object’s motion? What effects do these forces have?
one-celled organism
Many-celled organism
the food making process
Answers
Answer:
Different forces (including magnetism, gravity, and friction) can affect motion
Electrical energy is the energy of e_____________________________ charges.
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Answer:
Electrical energy is the energy derived from ELECTRIC POTENTIAL ENERGY or KINETIC ENERGY of the charged particles. In general, it is referred to as the energy that has been converted from electric potential energy.
A plane travels a distance of 3,650 kilometers in 5.50 hours. What is the average speed of the plane
Answers
Answer: 625.71km/h
Explanation: Divide the numbers.
Question 1 (2.5 points)
Which of the following safety guidelines is NOT important to this lab experiment?
Use wet paper towels or a fire extinguisher to put out small fires.
Ensure that you have a clean working space to minimize errors.
Wear goggles when there are flying objects near your face.
Read instructions before beginning the lab so you know what you are doing.
Question 2 (2.5 points)
As the number of washers goes up, what happens to the mass and the centripetal force on the apparatus?
mass goes up, centripetal force goes down
mass goes up, centripetal force goes up
mass goes down, centripetal force goes down
mass goes down, centripetal force goes up
Question 3 (2.5 points)
What is the independent variable in this experiment?
number of washers
radius (length of string)
time for 20 revolutions
velocity
Question 4 (2.5 points)
What is the dependent variable in this experiment?
number of washers
radius (length of string)
time for 20 revolutions
velocity
Question 5 (2.5 points)
Why is it important to keep the length of the string the same?
Because it can affect the velocity by affecting the circumference.
To make the experiment easier.
Because that is the only length it will work properly at.
Because that is the only length it will work properly at.
Question 6 (2.5 points)
As the number of washers goes up, what happens to the circumference?
The circumference increases.
The circumference decreases.
The circumference stays the same.
What's a circumference?
Question 7 (2.5 points)
As the number of washers goes up, what happens to the time for 20 rotations?
The time increases.
The time decreases.
The time stays the same.
Question 8 (2.5 points)
As the number of washers goes up, what happens to the velocity?
The velocity increases.
The velocity decreases.
The velocity stays the same.
Question 9 (2.5 points)
Which of these is the best defintion for PERIOD in this experiment?
The time for one wave.
The time for one class.
The time for one revolution.
The dot at the end of a sentence.
Question 10 (2.5 points)
Why do we measure the time for 20 revolutions instead of the time for one revolution?
To get more accurate results.
Because human reaction time is too slow to reliably measure one revolution.
To reduce human errors in the results.
All the other answers are correct.
Answers
Answer:
I took the test on K12 and got an A
1. A
2. B
3. A
4. C
5. A
6. C
7. B
8. A
9. C
10.C
A pulley system has an efficiency of 87.5 percent.
How much of the rope must be pulled in if a force of
648 N is needed to lift a 150 kg desk 2.46 m?
(Disregard friction.)
Answers
Answer:
work done on desk = m g h = 105 * 9.81 * 2.46 = 2534 Joules
Explanation:
so work in = 2534 / 0.875 = 2896 Joules
that is your 648 times distance your hand moved holding the rope
2896 = 648 * x
4.47 meters
I think maybe a typo, 648 N is too big, maybe 64.8 ? Any block and tackle system does better than that.
If the acceleration vector of an object is directed parallel to the velocity vector, then Select one:
O a. the object is moving with a constant velocity.
O b. the object is turning.
O c. the object is at rest.
O d. the object is slowing down
O e. the object is speeding up.
Answers
Answer:
a. The object is moving with a constant velocity.
if a 50.0 kg mass weighs 554 n on the planet saturn, calculate saturn's radius
Answers
Answer:
this is impossible unless im doing my math wrong sorry
Explanation:
The pressure of a constant volume gas thermometer is 2100N/M squared at 38c. What will be the temperature of the gas when the pressure is increased by 1/3?
Answers
Answer:
Explanation:
In
Your own car has a mass of 1200 kg. If your car produces a force of 6000 N, how fast will it accelerate?
Answers
Using Newtons Second Law, we see that F = ma. Subbing in, we get 6000=(1200)a, which reduces to a=5 m/s^2
4. If an object had a mass of 216 g on Earth what would its mass be on the Moon?
Answers
Answer: Weight changes with surface gravity.So in Moon mass will be same as 26 gram mes.
Explanation:
a 225 kg crate is pushed horizontally with a force of 710n
Answers
Answer:
acceleration is 3.155
Explanation:
F = ma
710 = 225 a
a = 710/225
a = 3.155
can anyone heelp me plzz plzz
Answers
C would be the most accurate answer
Two spheres each have a mass of 2.0 x 10 kg. How far apart must they be to exert a
gravitational force of 50 N between them?
a).016 m b) 231 m c) 53,000 m
d) 110,000 m
e) 6.7 x 10" m
Answers
Hi there!
We can use the Gravitational Force equation:
[tex]F_g = \frac{Gm_1m_2}{r^2}[/tex]
Fg = Gravitational force (N)
m₁, m₂ = mass of spheres (kg)
r² = distance between the spheres
G = Gravitational Constant
We are given the force of gravity, so we can rearrange the equation to solve for r:
[tex]r^2F_g = Gm_1m_2\\\\r = \sqrt{\frac{Gm_1m_2}{F_g}}[/tex]
Plug in the given values:
[tex]r = \sqrt{\frac{(6.67*10^{-11})(2.0*10^9)(2.0*10^9)}{50}} = \boxed{231 m}[/tex]
Therefore, the correct answer is B) 231 m.
true or false Air pressure is highest at the bottom of a tornado's funnel?
Answers
Answer:
False. It is typically very low at that point.
Explanation:
imagine that the Earth's rotation slowed down to one half of its original speed. What would life be like? Write a response that describes how your life would change. As always, write in complete sentences!
Answers
Explanation:
if you meant ¾ of it's original speed then a day would have 42 hours thus making days & nights longer. Our weight would be more, because as the Earth would rotate slower, it would exert less centrifugal force on us. There would also be a temperature change as each hemisphere (Eastern and Western) would get more time to warm up from the Sun's rays. the year would obviously have half the amount of days and week which would mess up our schedules as well as our holidays and lastly there'll be younger deaths.
Heyyy! Okay riddle of the day
no looking up the answers. If you don’t know move on.
Here’s the riddle: what time is it when an elephant sits on a fence?
Answers
Answer:
Time to get a new fence...?
C'mon that's pretty cringe lol
Please give brainliest
have a nice day :D
A certain cubed object has a side of 76cm3 and a density of .76g/cm3, what is its mass? *
5776g
57.76g/cm3
100g
0.01
Answers
Mass = density x volume
Mass = 76 x 0.76 = 57.76
Answer: 57.76g/cm3
Answer:
5776
Explanation:
What are electromagnetic waves?
A:Waves that have different colors and can travel through
the emptiness of space.
B:Waves that can travel through the emptiness of space
very slowly
C:Waves that can travel through the emptiness of space
and stops when it gets close to the earth's
atmosphere.
D:Waves that can travel through the emptiness of space,
at the speed of light.
Answers
D: Sóng có thể truyền qua khoảng không của không gian,
với tốc độ ánh sáng.
how is power defined 1. the rate at which work is completed 2.the quantity of work completed 3.the direction of work 4. the total distance an objetc is moved
Answers
Answer:
1. The rate at which work is completed
Explanation:
Hello, I wanted an answer from a mathematician. The number 1.04 is closer to the number 1, 2, 1.25 or 1.5.
Answers
Answer:
1
Explanation:
line them up in order.
1, 1.04, 1.25, 1.5, 2
1.04 is in the middle of 1 and 1.25
1.04-1=0.04
1.25-1.04= 0.21
Answer:
1
Explanation:
1.04 lies between 1 and 1.25.
1.04 is 0.21 away from 1.25
1.04 is 0.04 away from 1.
0.04<0.21
Which of the following atoms contain a nucleus with no neutrons.
helium
hydrogen
deuterium
tritium
Answers
Answer:
Hydrogen
Explanation:
(H) atom does not have any neutrons in it's tiny nucleus.
Answer: C. Hydrogen
Explanation: Now I can answer the question lol, that bot didn't let me.
name a suitable thermometer for steady temperature of 1000 degree Celsius?
Answers
Answer: A platinum resistance thermometer
Explanation:
It is a versatile instrument for temperature measurement in the range from — 200° to 1000°C. It is used both for precision measurements of the highest accuracy and for routine industrial work.
Answer:
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Describe at least two ways to determine whether a relationship is proportional.
Answers
If two different quantities are given, how to check whether the relationship between them is proportional ? We have to get ratio of the two quantities for all the given values. If all the ratios are equal, then the relationship is proportional. If all the ratios are not equal, then the relationship is not proportional.
What characteristics do black holes have?
Answers
For astronomers the only three measurable physical properties that completely specify the characteristics of a black hole are its mass, its charge and its angular momentum.
Facts:
You Can't Directly See a Black Hole. ...
Our Milky Way Probably Has a Black Hole. ...
Dying Stars Lead to Stellar Black Holes. ...
There are Three Categories of Black Holes. ...
Black Holes Are Funky. ...
The First Black Hole Wasn't Discovered Until X-Ray Astronomy was Used.
How do I start this question?
Answers
Answer:
Typing in the keyboard the question that you have
Explanation:
The total momentum of a system of two moving identical bodies is zero. What should be true about the velocities of the bodies?
A) The velocities should be equal in direction and opposite in magnitude.
B) Both velocities should be zero
C) Both velocities should be equal in magnitude and opposite in direction
D) the velocities should be equal in magnitude and opposite in direction
Answers
For a zero total momentum of two bodies, the two velocities of the two bodies should be equal in magnitude and opposite in direction
According to the principle of conservation of linear momentum, the total momentum of an isolated system is constant.
[tex]Pi = P_f \\\\m_1u_1 + m_2u_2 = m_1v_1 + m_2 v_2[/tex]
where;
u is the initial velocity of the two bodiesv is the final velocity of the two bodiesm is the mass of the two bodies
When the total momentum is zero, the velocities of the two bodies will have equal values but opposite signs.
Thus, we can conclude that for a zero total momentum of the two bodies, the two velocities should be equal in magnitude and opposite in direction
Learn more here:https://brainly.com/question/22698801
who discovered earth was like a big magnet
Answers
ANSWER: William Gilbert
Identify if the verbs signal past, future, or present tense, and drag them to the appropriate box. I walked home. She will walk home. It will open next week. She studied. He made a list. She walks home. They leave the door open. Past Present Future. NO LINKS
Answers
Answer:PAST she studied
Present: she walks home, they leave the door open, I walked home, he made a list.
Future: It will open next week, she will walk home.
Explation:Its obvious
