why do some science classes teach that electrons, comparatively, have no mass?
helpppp ASAPPP
Answer:
An electron's mass is only 1/1,836 the mass of a proton. An electron is therefore considered nearly massless in comparison with a proton or a neutron.
Why is an element considered a pure substance?
Answer:
An element is a pure substance and is made of only one type of atom.
Explanation:
It cannot be broken down into a simpler substance.
The gravitational potential energy of an object moving on the ground is
Answer: ΔPEg = mgh
Explanation: Increases in height and the acceleration due to gravity. The gravitational potential energy of an object near Earth's surface is due to its position in the mass-Earth system.
Please write and solve this question in five sentences or more
Answer:
m
Explanation:
hjvb,nbvhgjhghjmn,
what is net netforce?
Which of the following is most likely to require direct current (DC) for proper operation?
a. A blender
b. A flashlight
c. An electric heater
d. A microwave oven
Answer:
the answer is b
Explanation:
help yall this is serious-
Answer:
convection: heat transfer by movement of currents inside a liquid, currents in the mantle, temp inside the house, red dye rises blue dye sinks,
radiation: heat from a bonfire, transfer of energy through space,
conduction: frying pan to cooking egg, candle heating up foil to chocolate chips
Explanation:
What Lags harder than my Nokia
my brain.
Explanation:
...................
Answer:The Nokia XR20. ... HMD Global said the Nokia XR20 is the most durable phone it's created to date. The XR20 sports a tough 6.67-inch Gorilla Glass Victus display from American tech firm Corning and can resist damage from scratches and drops from about 6 feet, the company says.Jul 26, 2021
Explanation:
HELP ASAP ILL GIVE BRAINLIST
How are translational, rotational, and oscillatory motion used in the design of various robotic assemblies?
Answer:
Each of the joints represents a degree of freedom in the manipulator system and allows translation and rotary motion :) Hope this helps
what 3 things are produced as a result of the fusion of two atoms
Answer:
Electron, proton and neutron
Explanation:
In each and every atom they are consist of electron, proton and neutron.
A quarter is flipped from a height of 1.45 m above the ground. How much time will it take to reach the ground if the person flipping the coin gave it a velocity of 10.32 m/s? Please answer in seconds and to the third decimal place.
It will take the quarter 0.151 seconds to reach the ground.
Given the following data:
Height = 1.45 metersInitial velocity = 10.32 m/sWe know that acceleration due to gravity (a) for an object is equal to 9.8 meter per seconds square.
To find how much time it will take the quarter to reach the ground, we would use the second equation of motion.
Mathematically, the second equation of motion is given by the formula;
[tex]S = ut + \frac{1}{2} at^2[/tex]
Where:
S is the height or distance covered. u is the initial velocity. a is the acceleration. t is the time measured in seconds.Substituting the values into the formula, we have;
[tex]1.45 = 10.32(t) + \frac{1}{2} (9.8)t^2\\\\1.45 = 10.32t + 4.9t^2\\\\4.9t^2 + 10.32t - 1.45 = 0[/tex]
The standard form of a quadratic equation is:
[tex]ax^2 + bx + c = 0[/tex]
a = 4.9, b = 10.32 and c = 1.45
We would solve the above quadratic equation by using the quadratic equation formula;
[tex]x = \frac{-b\; \pm \;\sqrt{b^2 - 4ac}}{2a}[/tex]
Substituting the values, we have;
[tex]t = \frac{-10.32\; \pm \;\sqrt{10.32^2\; - \;4(4.9)(1.45)}}{2(4.9)}\\\\t = \frac{-10.32\; \pm \;\sqrt{106.5024\; - \;28.42}}{9.8}\\\\t = \frac{-10.32\; \pm \;\sqrt{78.0824}}{9.8}\\\\t = \frac{-10.32\; \pm \;8.84}{9.8}\\\\t = \frac{-10.32\; + \;8.84}{9.8}\\\\t = \frac{1.48}{9.8}[/tex]
Time, t = 0.151 seconds.
Therefore, it will take the quarter 0.151 seconds to reach the ground.
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Why is water not used as a liquid in glass thermometers?
Explanation:
Because water has no uniform rate of expansion and it vaporizes easy when temperature increases that makes it difficult to read.
the attractive or repulsive force between objects is called
A skateboarder flies horizontally off a cement planter. After 3 seconds the skateboarder lands on the ground with a final velocity of −4.5 m/s. Which kinematic equation would be most useful for finding the skateboarder’s initial velocity? (Assume a=−9.8 ms^2)
B
C or E
A
D
Given the time, the final velocity and the acceleration, we can calculate the initial velocity using the kinematic equation A:
[tex]v = v_o + a \Delta t[/tex]
A skateboarder flies horizontally off a cement planter. After a time of 3 seconds (Δt), he lands with a final velocity (v) of −4.5 m/s. Assuming the acceleration is -9.8 m/s² (a), we can calculate the initial velocity of the skateboarder (v₀) using the kinematic equation A.
[tex]v = v_o + a \Delta t\\\\v_o = v - a \Delta t = (-4.5 m/s) - (-9.8 m/s^{2} ) \times 3 s = 24.9 m/s[/tex]
Given the time, the final velocity and the acceleration, we can calculate the initial velocity using the kinematic equation A:
[tex]v = v_o + a \Delta t[/tex]
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Answer:
A
Explanation:
Did anyone have any clue about this question
which particle is transferred from one object to another to create a static charge?
Answer:
The answer is A: Electron
Because they are loosely bounded and can be easily transferred. The protons are bounded to the nucleus so they cant be transferred.
It cant be an atom or a molecule.
Explanation:
A 100 kg physics teacher pushes a 1.0 kg physics textbook across a 222 kg physics demo table. The teacher applies 5.0 N of force to start the book sliding and 4.0 N to keep it sliding at a constant 0.30 m/s across the table.
Sketch a free body diagram showing all the forces acting on the book as the teacher pushes it.
1 . What is the magnitude of the weight of the book?
2. What is the magnitude of the normal force of the table on the book?
4. What is the coefficient of static friction between the book and the table?
5. What is the coefficient of kinetic friction between the book and the table?
6. If the teacher stops pushing the book, what is the magnitude of the net force on the book?
7. What acceleration does the book have after the teacher stopped pushing it?
8. How far does the book slide before coming to rest?
Answer:
1) 1kg
2) 9.81kg
4) 5N
5) 4N
6) 0N
7) 0N
8) 13
Explanation:
Which phrase describes speed? A. A quantity with direction only B.A vector quantity C.A scalar quantity D.A quantity with no units
Answer:
C. A scalar quantity
Explanation:
Speed does not have a direction. Speed with a direction is known as velocity.Vector quantities are quantities with magnitude and direction. As stated before, speed does not have a direction.Speed has a SI unit of m/s (meters per second).Therefore, the answer is C.
Question 3
How many miles was the Trail of Tears?
O 1,000
1,200
O 1,500
3,000
Answer:
I think it is 1,200.
Explanation:
In the research I found, It says in a paragraph it is 1,200. I don't know if this is wrong or correct. I hope this helps!!!
How much work is required to lift a 21 N rock 7 m above the ground?
Answer:
Explanation:
w=-ΔU=-HF=-21×7=-147J
Sara walks, 3m North, from Point A to Point B. Which is True?
A. Distance and displacement are EQUAL
B. Distance is less than displacement
plz help me guys thank you
What is the relationship between the variables on this graph?
The temperature does not have an effect on flow rate.
As the temperature increases, the flow rate increases.
As the temperature increases, the flow rate decreases.
Answer:
The answer is A) "As the temperature increases, the flow rate decreases."
Para estudiantes de Español:
La respuesta es A) "A medida que aumenta la temperatura, el cuadal disminuye."
Explanation:
This is correct. I took the test!
Este es correcta! Tomé la prueba!
Answer: As the temperature increases, the flow rate decreases.
Explanation:
An___ is a pure substance that cannot be separated into any other substance
Atoms of the same element but with different numbers of neutrons
are
Answer:
atoms
Explanation:
i dont know
im pretty sure it atoms
which situation is an example of transferring heat by means of convection?
A situation that involves the transfer of heat by means of convection must involve the exchange of fluid currents such as land and sea breezes.
Heat transfer by convection is a method of heat transfer by which heat is transferred between two bodies through through currents of moving fluids or gases.
The following are examples of heat transfer by convection;
land breezes cooling the sea at nightsea breezes cooling the land during the dayboiling of watercirculation of blood, etcThus, a situation that involves the transfer of heat by means of convection must involve the exchange of fluid currents such as land and sea breezes.
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which kind of energy transformation occurs in a gasoline-powered car?
F. Chemical energy is converted into mechanical energy.
G. Mechanical energy is converted into light energy.
H. Light energy is converted into sound energy.
J. sound energy is converted into chemical energy.
Answer:
Chemical energy is converted into mechanical energy
Explanation:
Chemical energy stored in the bonds of hydrocarbons is released as heat which drives the piston in a car to produce circular motion that propels the car.
A FORCE OF 3,200 N WEST is applied to a 160 kg mass. What is the acceleration of the mass
I NEED A SCIENCE EXPERT TO GIVE ME THE RIGHT ANSWER TO THESE ASAP
Answer:
Control variable
Random variable
If two objects are dropped, they both hit the ground at the same time.
NEED HELP!!! 11 POINTS!!!
Based on Newton’s third law of motion, will a tennis ball go farther if it hits a tennis racquet that is still or one that is in motion?
OPTIONS:
A.
One that is still because it will absorb all of the force of the ball.
B.
One that is still because that will have a greater impact on the trajectory.
C.
One that is in motion because both the ball and the racquet will contribute momentum.
D.
One that is in motion because the racquet’s force will cancel the ball’s force out.
Answer:
c
Explanation:
because if a tennis ball hit a tennis racket still it would not go anywhere. with the tennis ball hitting the moving racket it will go further
One that is in motion because both the ball and the racquet will contribute momentum.
Thus, option (c) is correct.
Newton's third law of motion states that for every action, there is an equal and opposite reaction.
When the tennis ball hits a tennis racquet in motion, both the ball and the racquet will exert forces on each other in opposite directions.
This interaction will result in a transfer of momentum from the racquet to the ball and vice versa, potentially giving the ball a greater momentum and therefore potentially causing it to go farther.
Thus, option (c) is correct.
Learn more about Newton's third law here:
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