Question 1 Multiple Choice Worth 2 points)
Which statement best describes the difference between strong nuclear forces and weak nuclear forces?
O Weak nuclear forces are involved when certain types of atoms break down. Strong nuclear forces are responsible for holding atoms' nucleus together
Weak nuclear forces hold bonds between atoms together. Strong nuclear forces hold together the nucleus of an atom.
O Strong nuclear bonds prevent atoms from falling apart. Weak nuclear bonds prevent compounds from falling apart.
Strong nuclear forces are involved in breaking electrons from their shells. Weak nuclear forces hold protons in the nucleus.
Answer:
Explanation:
The correct answer is: Weak nuclear forces are involved when certain types of atoms break down. Strong nuclear forces are responsible for holding atoms together.
How much neutrons are in the nucleus of an atom with an atomic number of 25
Answer: 13 neutrons
Explanation: They differ only because a 24Mg atom has 12 neutrons in its nucleus and a 25Mg atom has 13 neutrons.
How much work is required to lift a 21 N rock 7 m above the ground?
Answer:
Explanation:
w=-ΔU=-HF=-21×7=-147J
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.
Did anyone have any clue about this question
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
Please write and solve this question in five sentences or more
Answer:
m
Explanation:
hjvb,nbvhgjhghjmn,
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.
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:
how long would it take to walk around the world
It would take about 8,300 hours to walk around the entire earth without stopping, which in days is 345.83, almost a full year.
Explanation:
I think that full 5 or 6 years
Guys please help me on the rest of the numbers
Answer:
C. 100
D.3
E. 33.3
Explanation:
C. Mechanical Advantage=Load / Effort
= 200N
--------
100N
Therefore,. = 100
D. I. Velocity Ratio= distance moved by the effort / distance moved by load
= 30cm/10cm
= 3
II. Efficiency= M.A / V.R
= 100/3
= 33.33
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 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
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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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:
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!!!
Which of the following statements accurately describe a scientific law?
there is no contradictory evidence in the current body of knowledge
it is an educated guess about how a process occurs
can be updated or rejected if any contradictory evidence is found
it is an statement that is true in many, but not all, cases
it is an observation that has been made many times
Answer:
The first statement appears most accurate.
The last statement also appears accurate, but it does not preclude any contradictory evidence.
The following statements accurately describe a scientific law: There is no contradictory evidence in the current body of knowledge. It is a statement that is true in many, but not all, cases. It is an observation that has been made many times.
The other statements do not accurately describe a scientific law:
"It is an educated guess about how a process occurs" describes a scientific hypothesis or theory, not a law.
"Can be updated or rejected if any contradictory evidence is found" describes the nature of scientific theories, which can be revised or discarded based on new evidence, but laws tend to remain consistent.
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A projectile is launched with an initial speed of 12 m/s. At its highest point its speed is 6 m/s. What was the launch angle of the projectile?
We want to find at what angle a projectile is launched given that at the highest point, the speed is 6m/s.
The launch angle of the projectile is 60°.
Remember that the only acceleration will appear on the vertical axis, and this is the gravitational acceleration, this means that on the horizontal axis we will have a constant speed.
Also remember that when an object is on its highest point, the vertical velocity is equal to zero, then it only has horizontal velocity (which we know it is a constant).
Then we can conclude that the horizontal velocity is equal to 6m/s.
If the angle is measured from the horizontal axis, we will have that the horizontal velocity is a projection on the x-axis of the initial speed, this is:
12m/s*cos(θ) = 6m/s
Now we can solve this for theta.
cos(θ) = (6m/s)/(12 m/s) = 1/2
θ = Acos(1/2) = 60°
The launch angle of the projectile is 60°.
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How is water cleaned in chongqing?
Answer:
I know
Explanation:
it gets filterd out
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:
4. Make new charts for each of the following scenarios. Predict what you think the graphs will
look like, and explain your reasoning.
a. The man starts three meters from the house and accelerates towards the tree.
b. The man stands still while he talks on his cell phone at the middle of the sidewalk, then
walks toward the house at a constant rate trying to get better cell reception. He comes to
a sudden stop when the coverage is good (about a meter before the house) and stands
still to finish his conversation.
c.The man starts close to the house, stands still for a little while, then walks toward the
tree at a constant rate for a while, then the slows to a stop.
Draw a position/time, velocity/time, and a acceleration/time graph for each scenario
10. A child drops a ball from a window. The ball strikes the ground in 3.0 seconds. What is the velocity of the ball the instant before it hits the ground?
plz help me guys thank you
Atoms of the same element but with different numbers of neutrons
are
Answer:
atoms
Explanation:
i dont know
im pretty sure it atoms
An___ is a pure substance that cannot be separated into any other substance
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:
( In 1.5s the speed of the jumper increases from zero to 10.5 m/s. Calculate her average acceleration during this time.
Answer:
answer 7m/s^2
Explanation:
›»› The Acceleration of jumper = 7 m/s²
Given :
Initial velocity of jumper (u) = 0 m/s
Final velocity of jumper (v) = 10.5 m/s
Time taken by jumper (t) = 1.5 sec
To Find :
Acceleration of jumper (a) = ?
Required Solution :
→ Initial velocity (u) = 0 m/s (because jumper increase from zero)
† From first equation of motion
⇒ v = u + at
⇒ 10.5 = 0 + a × 1.5
⇒ 10.5 = 0 + 1.5a
⇒ 10.5 = 1.5a
⇒ a = 10.5/1.5
⇒ a = 7 m/s²
║Hence, the Acceleration of jumper is 7 m/s².║
\:
Additional Information :
★ First equation of motion :
⪼ v = u + at
Where,
v is the Final velocity in m/s.
u is the Initial velocity in m/s.
a is the Acceleration in m/s².
t is the Time taken in second.
★ Second equation of motion :
⪼ s = ut + ½ at²
Where,
s is the Distance travelled in m.
u is the Initial velocity in m/s.
a is the Acceleration in m/s².
★ Third equation of motion :
⪼ v² = u² + 2as
Where,
v is the Final velocity in m/s.
u is the Initial velocity in m/s.
a is the Acceleration in m/s².
s is the Distance travelled in m.
What a Cell Wall can some tell me
Answer:
cell membrane
Explanation:
A cell wall is most commonly known as a cell membrane witch just controls what can go in and out of a cell .
( hope this helped )
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.
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