Answer:
B
Explanation:
Heat flows from hot to cold to lower the temperature of hot areas and increase temperature of cold areas. The end result is that the 2 areas have the same temperature, thus increasing entropy.
Heat flows spontaneously from hot to cold, and entropy increases.
The second law of thermodynamics relates to the entropy of a system. According to the second law of thermodynamics, the total entropy of a system may increase or remain constant in a spontaneous process.
The implication of this is that the entropy of a system never decreases. The entropy of a system increases when heat flows from a hot to a cold body and not vice versa.
Hence, the statement that; "Heat flows spontaneously from hot to cold, and entropy increases" describes the second law of thermodynamics.
Why can a liquid take the shape of the bottom of its container?
Answer:
Liquids take on the shape of their container because they contain particles that can slide past each other. Particles in a solid,
Explanation:
Answer: Liquids take on the shape of their container because they contain particles that can slide past each other.
A ___ force is not path-dependent and does not change the overall mechanical energy of an object.
Answer:
conservative
Explanation:
Nonconservative force is the force that depends on a path, however conservative does not depend on a path and it is not associated with the potential energy. When the work is done by an unconservative force, mechanical energy is added or removed. Friction is the best example for a non-conservative force. When these non-conservative forces are acting, the mechanical energy changes but these are not preserved.
hope this helped!
Answer: conservative
Explanation:
A conservative force is not path-dependent and does not change the overall mechanical energy of an object.
A conservative force is a force with the property that the total work done in moving a particle between two points is independent of the taken path, e.g. gravitational force or electric force.
A nonconservative force is one for which work depends on the path taken, e.g. frictional force.
Please help me answer this question! Will appreciate help very much. a) Draw a circuit to show 3 lights in series b) Draw a circuit to show 2 lights in parallel c) Draw a circuit that shows 2 lights in parallel which are both in series with a third light. d) What would happen to the 2 other lights if the third light in question c) fails
Answer:
C kind sir
Explanation:
A vector points 12.0 units along the x-axis, and 9.00 units along the y-axis. Find the direction of the vector
The resultant points somewhere between the positive x and y axes.
The angle it makes with the x-axis has a tangent of (9/12) = 0.75 .
That angle is 36.9°, rounded to the nearest tenth of a degree.
So the resultant vector points up and to the right, 36.9° above the x-axis.
Help.
Why do scientists believe that global warming is happening?
Which term best describes this step of the investigative process?
question
communication of results
peer review
experiment control
Answer:
peer review
Explanation:
The investigative process involves the development and inclusion of the steps involved to find an answer or solution to a specific question. Certain steps are followed in the process. The hypothesis is formulated, tested, and modified during the whole process. peer review involves the suggestions, comments, and interpretation of people in similar fields about the hypothesis. The given extract focuses on the investigative process of peer-reviewing. The review of the scientists from different countries has been asked to give their suggestions and advice on the journal before its publication.
As a charged object approaches a neutral object the objects.......
attract
spin
repel
no interaction
Answer:
attract is the answer.
Answer:
It attracts
Explanation:
It attracts the object
A planet has a period of revolution about the Sun equal to Tand a mean distance from the Sun equal to R. T varies directly as _____.
A. R
B. R²
C. R3
D. R4
E. R5
Answer:
C. R3
Explanation:
Answer:
C. R3
Explanation:
Plato
PLEASE HELP QUICKLY!
What are the names of the components (each shown with a leader and a line) of a circuit shown in the diagram.
Name all 4.
Answer : a power supply of a circuit that was horizontal of the ladder where they controlled the circuit
Buoyancy is a force that always acts in a _____ direction, exerted by a fluid on a body placed in the fluid.
Answer:
Upwards direction
Explanation:
The buoyancy force is caused by the pressure exerted by the fluid in which an object is immersed. The buoyancy force always points upwards because the pressure of a fluid increases with depth.
Answer:
Upwards direction
Explanation:
Resistance is a measure of.
a) the energy per unit charge in a circuit
b) how hard it is for electrons to move through the circuit
c) how hard it is for electrons to move through the battery
d) the number of charge carriers in a circuit
1 Point
What kind of reaction is most likely to stop when you cut off its supply of
oxygen?
O A. Decomposition
O B. Displacement
O C. Combustion
O D. Combination
SUBMIT
Answer: C
Combustion
Explanation:
Oxygen support combustion in a chemical reaction. Oxygen support burning.
In the absence of oxygen, combustion reaction can never take place. And when the supply of oxygen is being cut off, combustion reaction will automatically stop.
The correct option is C which is combustion
Does anyone know how to do this question???
Force = 7kN
Pressure = 1mPa
Area = ?
Answer:
7000 m^2
Explanation:
Pressure=Force/Area
1=7000/Area
1(Area)=7000
Area=7000 m^2
Which of the following is the best description of the term resultant
displacement?
A. The scalar that joins all the points along the path.
B. The average of all the displacement vectors.
C. The total distance traveled.
O D. The shortest distance from the beginning point to the end point.
Answer:
D
Explanation:
Displacement refers to the shortest, or straight-line path from one point to another. It is a vector, thus A is incorrect. It is not the average, but rather the sum of all displacement vectors, so B is incorrect. It is not the distance traveled, as some paths have longer distances than others, while leading to the same destination, hence same displacement. (i.e. running around in circles yields positive distance traveled but zero displacement.)
Answer:
Explanation: D
Displacement is a vector. It has direction and it has magnitude. But we are asked for the resultant displacement. You have to use pythagorean theorem. This makes our answer always positive. That essentially means distance, since you did just do the distance formula.
A is wrong because that tells you perimeter
B is wrong because that tells you the midpoint
C is wrong because displacement and distance are two different things. We dont want the distance of the two vectors
D is correct, this perfectly explains the distance formula
explain why the statement “Dropped objects fall toward the ground" is a law and not a theory
The statement is a law because it accurately describes EVERY observation. No contradiction has ever been observed that would disprove it, or even cast doubt on it.
(Wellll ... at least, no contradiction that wasn't immediately and easily explainable, like dropping a helium balloon, or a sheet of paper in a high wind.)
The statement is legal because it accurately describes all that is seen. No controversy has ever arisen to disprove it or cause it to doubt.
What is gravity?The force of gravity is the force that the planet or another body of gravity absorbs. Gravity holds all the planets in orbit around the sun.
What causes gravity?The greater the size of the two objects and the shorter the distance between them, the stronger the gravitational force. We also know that gravity can work in a complex system with several components.
Learn more about gravity here: brainly.com/question/4208016
#SPJ2
Two waves with amplitudes of 52 units and 98 units come together. Their amplitude, which is measured at a specific point and time, is 46 units. What wave behavior explains this value? A. destructive interference B. constructive interference C. refraction D. diffraction E. partial transmission
Answer: A
destructive interference
Explanation: Interference involves coming together of two waves of the same type. E.g sound waves, water waves e.t.c
Whenever two waves of different amplitude interferes with one another and there is increase in amplitude, this is known as constructive interference.
But whenever there is decrease in amplitude as a result of interference of the two waves, this is known as destructive interference.
If Two waves with amplitudes of 52 units and 98 units come together. Their amplitude, which is measured at a specific point and time, is 46 units. The wave behavior that explains this value is destructive interference because of decrease in the units of amplitude.
Answer:
destructive interference
Explanation: Plato user
On the moon, what would be the force of gravity acting on an object that has a mass of 7 kg?
Answer: 7 kg
Explanation:
Which of the following situations would produce and average velocity of zero
Question 10 of 10
2 Points
Which of the following best describes how the Federal Reserve Bank helps
banks during a bank run?
A. The Federal Reserve Bank acts as an insurance company that
pays customers if their bank fails.
B. The Federal Reserve Bank regulates exchanges to prevent the
demand for withdrawals from rising above the required reserve
ratio.
C. The Federal Reserve Bank has the power to take over a private
bank if customers demand too many withdrawals.
D. The Federal Reserve Bank can provide a short-term loan to banks
to prevent them from running out of money.
Answer:
D. The Federal Reserve Bank can provide a short-term loan to banks
to prevent them from running out of money.
Explanation:
A bank run occurs when a large number of depositors withdraw their deposits simultaneously from a bank.
As the number of withdraws increases, the available cash in the bank decreases until a point that the bank can't give depositors their money.
In these situations, The Federal Reserve Bank acts as a lender of last resort that helps to reinforce the effect of deposit insurance, and to reassure bank customers that they will not lose their money.
All engines operate at less than 100 percent efficiency because they
A. absorb heat
B. conduct heat
C. burn gasoline
D. emit heat
Answer:
It is B or D, but I may be leaning a little more towards D.
Explanation:
A lens with f= 10.0 cm is held
45.0 cm from an object. What is
the image distance?
(Unit = cm)
it is not 12 cm.
Answer:
8.2 cm
Explanation:
1/f = 1/so + 1/si
1/10 = 1/45 + 1/si
1/si = 1/10 - 1/45
1/si = 9/90 - 2/90
1/si = 7/90
si = 90/7 = 12.86 cm.
since you said that the answer was not 12 them the lens must be concave with negative (minus) focal length
1/f = 1/so + 1/si
- 1/10 = 1/45 + 1/si
1/si = - 1/10 - 1/45
1/si = -9/90 - 2/90
1/si = -11/90
si = -90/11 = - 8.2 cm
- (read: minus or negative sign) indicates the image is in the same side of the object
hope its true and can help you
Answer:
1/f = 1/u + 1/v
f=10cm
u=45cm
v=? (Image distance)
1/v = 1/f - 1/u
1/v = 1/10 - 1/45
1/v = (9-2)÷ 90
1/v = 7/90
:. v = 90/7
v=12.86cm(image distance)
please i need detaailed explanation
This is a continuation of the first question.
Answer:
1Farahd
The equivalent capacitance in parallel 6F is now in series with
3F - 2F = 1F
ANSWER QUICK 40 POINTSSSS
QUESTION 6
Why are the moon’s craters preserved?
A)The moon is windy.
B)There are tectonic plates shifting on the moon.
C)Water preserves them.
D)There are no longer live tectonics occurring on the moon.
QUESTION 7
Why do you see only one side of the moon from Earth?
A)The moon does not rotate.
B)The moon takes longer to rotate than to revolve around Earth.
C)The moon takes less time to rotate than to revolve around Earth.
D)The moon’s period of rotation and revolution are equal.
QUESTION 8
What is the best description of the side of the moon that faces Earth?
A)random
B)The same
C)goes through cycles
D)changes
QUESTION 9
In what position are the moon, the earth, and the sun during the first quarter moon?
A)The moon is between the sun and the earth.
B)Earth is between the sun and the moon.
C)The sun is between the earth and the moon.
D)The moon is to the side of the earth and the sun.
Answer:
For 6 its D
For 7 its A
For 8 its C
For 9 I think its B but Im not sure
HELP PLEASE!! A yellow ball with a mass of 2kg is rolling across the floor at 3m/s. A red ball with a mass of 3kg is rolling across the same floor at 3m/s. Which ball has greater kinetic energy, and why?
Answer: B. The red ball has greater kinetic energy, because it has a greater mass.
Explanation:
The factors influencing the kinetic energy of an object are its mass and its velocity. Both of the balls have the same velocity; however, the red ball has a greater mass. Therefore,
The red ball has greater kinetic energy, because it has a greater mass.
I hope this helps:)
A wave has a frequency of 1000 Hz and a wavelength of 0.33 m. What is the
speed of the wave? Use the equation v=fxa.
O
O
O
A. 330 m/s
B. 590 m/s
C. 0.017 m/s
O
D. 0.0030 m/s
SUBMIT
A
Explanation:
V= f×a
V= 1000Hz ×0.33m
V= 330m/s
What is the average velocity of atoms in 1.00 mol of neon (a monatomic gas) at 465 K? For m, use 0.0202 kg.
Answer: 757m/s
Explanation:
Given the following :
Mole of neon gas = 1.00 mol
Temperature = 465k
Mass = 0.0202kg
Using the ideal gas equation. For calculating the average kinetic energy molecule :
0.5(mv^2) = 3/2 nRt
Where ;
M = mass, V = volume. R = gas constant(8.31 jK-1 mol-1, t = temperature in Kelvin, n = number of moles
Plugging our values
0.5(0.0202 × v^2) = 3/2 (1 × 8.31 × 465)
0.0101 v^2 = 5796.225
v^2 = 5796.225 / 0.0101
v^2 = 573883.66
v = √573883.66
v = 757.55109m/s
v = 757m/s
When transferring electric charge, an object becomes negative when it
a) loses protons
b) gains electrons
OC) loses electrons
d) gains protons
e)
a and d are correct
Answer:
b) gains electrons
Explanation:
When transferring electric charge, an object becomes negative when it gains electrons
How does the value of the electrostatic force vary with the value (how many) of the charges?
Answer:
Electrostatic force is directly proportional to the amount of charge on each body under consideration.
Electrostatic force increases with increase in charge.
Electrostatic force decreases with decrease in charge.
Explanation:
Electrostatic force is the force between 2 charges which can be explained by the Coulomb's Law:
F= K (q₁)(q₂)/r²
Where
F= Electrostatic Force
K = Constant of Proportionality
(q₁) and (q₂) = Amount of charge on each body
r = Distance between two bodies carrying charge
If the value of (q₁) or (q₂) is increased considering the other factors remain constant, the value of F will also increase.
And vice versa.
Which of the following planets helped astronomers locate another planet?
Group of answer choices
Mercury
Uranus
Saturn
Pluto
Answer: Pluto,Mercury
Explanation:
PLEASE HELP THIS IS MY LAST QUESTION!!! HELP ASAP!!
Which of these does NOT have gravity?
A. heat
B. an apple
C. a small moon
D. Earth's atmosphere
Answer: its A
Explanation: it cant be earths atmosphere because is it was we would be flouting
Answer:
a
Explanation:
