Answer:
it is a the answer is a btw
Explanation:
Physics help, please? :)
3. Consider a locomotive and the rest of a freight train to be a single object. Suppose the locomotive is pulling the train up a hill. Describe the action and reaction forces that cause the locomotive to move up the hill, such as the reaction force and gravity.
4. Is the force of the earth’s gravity on the sun stronger, weaker, or the same as the force of the sun’s gravity on the earth? Explain why the sun’s attraction affects the motion of the earth more than the earth’s attraction affects the sun’s motion. Employ Newton’s second and third laws in your answer.
If anyone could help me at all, with either question it would be greatly appreciated, Physics is my hardest subject, and I struggle with it.
Answer:
Explanation:
3. Newton’s third law explains how every action has an equal but opposite reaction, meaning that forces comes in pairs. While the locomotive’s wheels are pushing back against the ground as the action force, the ground is producing a reaction force towards the locomotive, propelling it forward. Another pair of forces that act on the locomotive is gravity and normal force. While gravity is pulling the locomotive towards the ground, the normal force the ground exerts on the locomotive is why the locomotive doesn’t fall through the ground.
4. The force of Earth’s gravity on the Sun is weaker than the force of the Sun’s gravity on Earth. The Sun’s attraction affects the motion of Earth more than the Earth’s attraction affects the Sun’s motion because according to Newton’s second law, force has mass as one of its factors. The Sun has a significantly higher mass than Earth, meaning that its force of gravity would also be significantly higher. Newton’s third law is why the Earth doesn’t get marginally closer to the Sun, stating that every action has an equal and opposite reaction. As the Sun is pulling Earth towards itself, Earth is pulling away from the Sun.
Which of the following non-metals is used as a lubricant in powdered form?
a) Sulphur
b) lodine
c) Graphite
d) Silicon
Answer:
Graphite.
Explanation:
Graphite: "a gray crystalline allotropic form of carbon which occurs as a mineral in some rocks and can be made from coke. It is used as a solid lubricant, in pencils, and as a moderator in nuclear reactors."
What is the acceleration of a 3 kg mass being pushed by 13N of force?
Answer:
The answer is 0.23 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
f is the force
m is the mass
From the question we have
[tex]a = \frac{3}{13} \\ = 0.230769...[/tex]
We have the final answer as
0.23 m/s²Hope this helps you
Mohammad has been saving 8 each week. Today he spent 142 of the savings, and he now has 50 left. For how many weeks has he been saving?
Answer:
24 weeks
Explanation:
142+50=192
192/8=24
Calculate the amount of horizontal force needed to make a 0.4 kg soccer ball accelerate at 250 m/s2when kicked.
Answer:
100N
Explanation:
Force = Mass x Acceleration
Force = 0.4 kg x 250 m/s2
Force = 100N
how much power is needed to produce 500 joules of work if 20 watts are used?
An object of mass(0.8kg) is attached to massless string of length (2.0),and swung with a tangential velocity of (3.0m/s) what is the tension in the string?
Answer:
3.6 N
Explanation:
The magnitude of centripetal force in this case is equal to the magnitude of tension in the spring.
The formula is :
T= mv²/r ------where T is tension
m= mass of object =0.8 kg
v= velocity of object {tangential velocity} = 3.0 m/s
r= length of string = 2m
Applying the formula with real values;
T= mv²/r
T= {0.8 * 3²} / 2
T= { 7.2}/2 = 3.6 N
Ana exerts a force of 20 N on a volleyball that has a mass of 0.15 kg. What is the force that the volleyball exerts on Ana?
0.15 N
20 N
19.85 N
20.15 N
Answer:
20 N
Explanation:
The question above is related to "Newton's Third Law of Motion." It states that every action is being opposed by a reaction of equal size but different direction.
The action force in the situation above is 20 N while the reaction force here is the one coming from the volleyball. So if the action force is 20 N then it's a common sense that the reaction force is also 20 N.
Thus, 20 N is the amount of force that the volleyball is exerting on Ana.
Answer:
the answer is 20 N
Explanation:
yw!!
When two soft, deformable objects such as two balls of putty collide,
A)the internal energy is conserved
B) the kinetic energy is conserved
C) chemical energy is conserved as the objects get warmer
D) the sum of the kinetic energy and the internal energy is conserved
Answer:
D) the sum of the kinetic energy and the internal energy is conserved
Explanation:
When soft deformable objects such as two balls of putty collide, their total energy will be conserved , according to law of conservation of energy .
Their energy involves kinetic energy and potential energy . Their kinetic energy is due to their motion . Their potential energy is due to their shape . If there is change in their shape , there will be change in their potential energy .
Their internal energy consists of potential energy and thermal energy . Due to collision , heat will be produced so their thermal energy will also change . In this way there will be change in their internal energy .
But in spite of all these changes , total energy will be conserved . That means if one form of energy is reduced , the other kind will be increased and so on.
Hence the sum of the kinetic energy and the internal energy is conserved
What is potential mechanical energy
true or false communication is important in healthy relationship
Answer:
True
Explanation:
If two partners don't communicate they'll grow apart and it may lead to one or the other cheating.
Answer:true
Explanation:
if you weigh 100 pounds and pull 4 g's how much do you now weigh
Answer:
sill 100?
Explanation:
Question 10 (1 point)
When the student releases the water balloon, it swings forward. When the water balloon swings back, you can tell that the student expects the
water balloon to hit her face. Why does the water balloon not continue on and hit the student's face?
Answer:
It does not hit the students face because the speed of the balloon slows down as energy is lost through thermal.
Explanation:
I WILL GIVE BRIANLIEST!!!!!
Choose all the answers that apply.
Which of these statements are true?
A hypothesis is the conclusion of an experiment.
Observation is usually the first step in scientific method.
Dependent and independent variables are the same in an experiment.
Scientists try to understand the phenomena that occur in the environment.
Bias is a judgment that is not based on fact.
Answer:
Observation is usually the first step in scientific method
Scientists try to understand the phenomena that occur in the environment.
Velocity refers to an object’s _____ and direction.
Inside a car that was at 273 K, a bottle with a pressure at 100,000 pascals warms up to
350 K. If the volume of the bottle remains constant, what is the pressure, in pascals,
inside the hot water bottle?
Answer:
P2 = 128,205 pascal.
Explanation:
Given the following data;
Original Pressure, P1 = 100,000 pascals
Original Temperature, T1 = 273K
New Temperature, T2 = 350K
To find new pressure P2, we would use Gay Lussac' law.
Gay Lussac's law states that when the volume of an ideal gas is kept constant, the pressure of the gas is directly proportional to the absolute temperature of the gas.
Mathematically, Gay Lussac's law is given by;
[tex] PT = K[/tex]
Where;
P represents pressure. T represents temperature. K is the constant of proportionality.[tex] \frac{P1}{T1} = \frac{P2}{T2}[/tex]
Making P2 as the subject formula, we have;
[tex] P_{2}= \frac{P1}{T1} * T_{2}[/tex]
Substituting into the equation, we have;
[tex] P_{2}= \frac{100000}{273} * 350[/tex]
[tex] P_{2}= 366.3004* 350[/tex]
P2 = 128205.13 ≈ 128205 pascal.
Therefore, the pressure inside the hot water bottle is 128,205 pascal.
Please help!
Which of the following will increase the force needed to pull an object up a ramp?
A, Oiling the ramp
B. Reducing the angle of the ramp
C. Putting wheels underneath the object
D. Increasing the mass of the object
Answer:
I believe the answer is B. Reducing the angle of the ramp. ( sorry if wrong:)
example of third class Lever first class Lever and second class Lever
pregunta: como palancas ??
Answer:
wrench wheel barrow tweezers
Explanation:
In this chemical reaction, one or more atoms replaces a part of a
compound.
*
synthesis
decomposition
combustion
replacement
neutralization
Explanation:
If there are more reactants than products, it is a synthesis reaction. If oxygen is a part of the reactant, it is a combustion reaction. If one ion replaces another, it is a single replacement reaction. If there are two compounds in a reactant where cations switch, it is a double replacement reaction.
Help!!
Remember W = mg, 1 kg = 2.2 lbs. S
1) If you have a 12 lbs. bag of potatoes what is its mass? What is its weight?
Answer:
5.5 KG is the mass
53.9 is the Weight
The unit of work is a derived unit.
Answer:
energy, work, quantity of heat. joule J
name the factors on which kinetic energy and potential energy depends
Answer:
The kinetic energy of an object depends on both its mass and its speed. Kinetic energy increased as mass and speed are increased. An objects gravitational potential energy depends on its weight and on its height relative to a reference point.
Finding the area of a trapezoid on a velocity versus time graph will tell you
the ——————
of an object.
A. displacement
B. acceleration
C. velocity
D. distance
Its a bit confusing. Please answer.
Answer:
c is answer ...............
PLS HELP!!!
where does energy go if work is done by a non-conservative force ?
Answer:
The energy changes
Explanation:
When an non-conservative force (for example friction, air resistance, applied force) does work on an object, the total mechanical energy (Ek+Ep) of that object changes. If positive work is done, then the object will gain energy. If negative work is done, then the object will lose energy.
A locomotive starts from rest and accelerates at 0.12 m/s^2 to a speed of 2.4 m/s in 20 s. This motion could best be described as
A.) constant acceleration and constant velocity
B.) increasing acceleration and constant velocity
C.) constant acceleration and increasing velocity
D.) increasing acceleration and increasing velocity
Answer:
C
Explanation:
do you think you know this???
Answer:
electrical energy into mechanical energy
anybody got any answers???
Answer:
b? to a?
Explanation:
It converts mechanical energy to electrical.
Therefore, Option A is the correct answer
A 700-kg car, driving at 29 m/s, hits a brick wall and rebounds with a speed of 4.5 m/s. If the car was in contact with the wall for 0.30 s, what force did the wall exert on the car during the collision?
Answer:
57166.6NExplanation:
Step one:
given data
mass=700kg
initial velocity u=29m/s
final velocity=4.5m/s
time t= 0.3second.
Step two:
The expression for the momentum is given as
FΔt=mΔv
make F subject of the formula
F=mΔv/Δt
Substitute our given data we have
F=700(29-4.5)/0.3
F=700*24.5/0.3
F=17150/0.3
F=57166.6N
the force is 57166.6N
What is the difference between physical & chemical changes?
Slate whether each is an example of a Physleat (P) or Chemteal (C) property
1. Arock's density
2. boiling point of Gatorade
3. ability of an old car to rust
4. red color of a pe apple
S ability of wood to ignite
8. bitler taste of a lemon
7. melting point of wax
8. hardness of marble
9. Luster (shininess) of gold
boiling point Gatoride
