MAINIdea Newton's laws of motion relate the change in an object's motion with the forces acting on it.
Answer:
Newton's laws of motion relate an object's motion to the forces acting on it. In the first law, an object will not change its motion unless a force acts on it. ... In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction
Can anyone explain how to solve these problems?
The refrigerator's coefficient of performance is 3.81.
The refrigerator's power input is 504 W.
Refrigerators coefficient of performanceThe refrigerators coefficient of performance is calculated as follows;
[tex]COP = \frac{T_{cold}}{T_{hot} - T_{cold}}[/tex]
The cold temperature = -71⁰C = 202 KThe hot temperature = -18⁰C = 255 K[tex]COP = \frac{202}{255 - 202} \\\\COP = 3.81[/tex]
Work done in the refrigerator[tex]W = P \Delta V = P (V_2 - V_1)\\\\W = 150 \times 10^3 (100 \times 10^{-6} \ - \ 40 \times 10^{-6})\\\\W = 9 \ J[/tex]
Refrigerators power input[tex]P = \frac{E}{t} \\\\P = 9 \ J \ \ \times \ \ 56 \ \frac{cycle}{s} \\\\P = 504 \ J/s \ = \ 504 \ W[/tex]
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according to einstein's theory of simple relativity (_E + mc(2)_). BLANK is converted into BLANK.
Answer:
energy is converted into mass
Explanation:
Which of the following happens when two positively charged objects are brought near each other?
the potential energy decreases
both a repulsive force and an attractive force is produced
the two objects have no influence on each other
the potential energy increases
scientific question about newton laws of motion
Answer:
Can Newton's laws of motion be broken?
Explanation:
A team of researchers has managed to (very technically) break Newton's third law of motion — that every action has an equal and opposite reaction — by accelerating laser pulses around a loop seemingly without any corresponding push-back.
Answer:
Newton’s laws of motion, three statements describing the relations between the forces acting on a body and the motion of the body, first formulated by English physicist and mathematician Isaac Newton, which are the foundation of classical mechanics.
Explanation:
Newton’s laws of motion, three statements describing the relations between the forces acting on a body and the motion of the body, first formulated by English physicist and mathematician Isaac Newton, which are the foundation of classical mechanics.
Please answer and show work
A car moving with a velocity of 30m/s has a constant acceleration of -4m/s? What will be the velocity 3 seconds later?
-12m/s
b. 18m/s
C. 42m/s
d. 90m/s
Show Calculation:
Answer:
v2 = v1 + at
a acceleration
t time
v2 final velocity v1 initial velocity
v2 = 30 + -4*3 =
30 -12 = 18m/s
in regions where the suns rays hit at an angle, solar energy is______ and climate is _____. A. Focused, cool. B. Focused, warm. C. Spread out, cool. D. Spread out, warm
Answer:
B.Focused,warm
Explanation:
when the rays are focused more energy an area recieves and it is warmer there.
Calculate the speed of a bowling ball that travels 6 meter(s) in 5 second(s). The speed is _______ m/s. (Answer to two decimal places.)
Answer:
Speed is 1.2 m/s
Explanation:
Formula for speed is
S = d/t
Put values
S = 6/5 = 1.2
Answer this question. URGENT!!
Answer:
D)80/10 × 5 × 10^-4 N m^-2
Explanation:
this is the answer that was on my assignment
The froghopper holds the title of the best jumper of the animal world. A 0.0198-gram (1.98 X 10-5 kg) froghopper can accelerate from 0m/s to 4m/s in only one one thousandth of a second (0.001 s) as it jumps. What is the force delivered to the froghopper as it makes this jump
Answer:
25.0 N
Explanation:
Just took the test
please help i’ll mark you
Answer:
What should I do. reply quickly for a quick answer
Answer: put a line across the paper
Explanation:
1. What are the things needed by plants to make their own food?
A. water, chemicals and oxygen
B. oxygen and carbon dioxide
C. oxygen and chemicals
D. carbon dioxide, soil and sunlight
of
2. What kind of interaction is shown when worms live in the guts and flesh
a fish?
A. mutualism
B. commensalism
C. predation
D. parasitism
3. What kind of interaction is shown when monkeys in tropical rainforest
compete for food with other animals?
A. mutualism
B. commensalism
C. competition
D. predation
answer quickly.
Answer:
1.d 2.d 3.c
Explanation:
[tex]\bold{What \: is \: the \: speed? }[/tex]
Refer to the above attachment
Humans are pouring carbon dioxide into the atmosphere much faster than plant and ocean can absorb it ?
Answer:
Humans are pouring carbon dioxide into the atmosphere much faster than plants and oceans can absorb it. These gases persist in the atmosphere for years, meaning that even if such emissions were eliminated today, it would not immediately stop global warming.
Explanation:
By absorbing increased carbon dioxide from the atmosphere, the ocean reduces the warming impact of these emissions were they to remain in the atmosphere. However, carbon dioxide dissolved into the ocean causes seawater to acidify, threatening the ability of shellfish and corals to build their skeletons and affecting the health of other fish and marine species—many that are important to coastal economies and food security.“The increasing load of carbon dioxide in the ocean interior is already having an impact on the shellfish industry, particularly along the U.S. West Coast,” said Richard Feely of NOAA’s Pacific Marine Environmental Laboratory, leader of NOAA’s West Coast acidification-observing network and a co-author of the study. “We have been working with the industry to provide an early warning system against the most severe impacts of rising carbon dioxide levels.” Rik Wanninkhof, an oceanographer at NOAA’s Atlantic Oceanographic and Meteorological Laboratory and another co-author, added: “A critical question that warrants continued observations of the ocean is if this uptake can be sustained and what might happen to the Earth’s atmosphere if the ocean is unable to absorb continued increased carbon dioxide.”“A higher concentration of carbon dioxide in our atmosphere would aid photosynthesis, which in turn contributes to increased plant growth,”
Help asap!!!
Due right now!! fast!!!
Answer:
Not sure but I think its (A)
Explanation:
I think its (A)
Answer:
C
Explanation:
They divided some numbers and got 5
It said something about it accelerates at 10 seconds so all I did was multiply by 2 and I got C
find the equivalent resistance of 800 ohms, 4 kilo-ohms, and 1500 ohms in series and in parallel.
Answer:
Series 6300 ohmn and parallel 460.83 ohms
Explanation:
Data :
Resistance R1 = 800 ohms
Resistance R2 = 4 kilo ohms = 4000 ohms
Resistance R3 = 1500 omhs
So formula for equalivent series resistance
R = R1 + R2 + R3 = 800 + 4000 + 1500 = 6300ohms
For parallel equalivent resistance
1/R = 1/R1 + 1/R2 + 1/R3 = 1/800 + 1/4000 + 1/1500 =
1/R = 0.0021666666666
R = 460.82949308755 ohms
In a competition, weightlifter 1 lifts a 100 kg weight from the floor. Weightlifter 2
also lifts a 100 kg weight to the same height above the floor, but takes a longer time
to do so. Which of the following statements describes the work done and the power
used by the weightlifters?
Answer:
b
Explanatiobn:
Weightlifter 1 has more power as compared to weightlifter 2 because it takes longer time to lift the weight.
What is Work?
Work is a physics term used to describe the transfer of energy that takes place when an object changes above a distance because of an external force, at least some of which is given in the vector of the dislocation.
The element of the force acting all along the path multiplied by the length of the path can be used to calculate work if the force is constant.
Mathematically, this idea is expressed as W = fd, where W is the effort and f is the force multiplied by d, the distance. Work is completed whenever the force is applied at an angle of with regard to the displacement.
As per the given information in the question,
The power is work done per unit time or if the time will increase, the power will decrease. Power and time are inversely proportional to each other. So, the weightlifter 1 is taking less time than it has more power compared to weightlifter 2.
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Identify the processes that are necessary for continued growth and division in a normal body cell
Please hurry!
-Thank you
Answer:
In a normal body cell, the processes that are necessary for continued growth and division is referred to as cell cycle. Cell cycle is the procedure by which cells divide and grow, consisting of specific step by step phases. INTERPHASE is the phase in which the dividing cells spends most of the time resting as it grows to prepare for cell division.
HELP CHECK ANSWERS ONLY 3 QUESTIONS:
1. If you took your weight first at sea level and then on top of a very tall mountain, you would find that your weight:
a. decreases
b. stays the same **
c. increases
2. Smaller masses experience more gravitational force than bigger masses.
A. True
B. False **
3. An asteroid moves away from our planet. What happens to the gravitational attraction between it and the earth as it zooms away?
a. It decreases. **
b. It increases.
c. It does not change.
d. It becomes zero.
Answer:
answer 1 is A, Answer 2 is A, Answer 3 is c
When an asteroid moves away from our planet the gravitational attraction between it and the earth as it zooms away increases.
What is gravitational force?The term gravitational force is a force that is attractive and acts between any two masses on the earth surface.
If you took your weight first at sea level and then on top of a very tall mountain, you would find that your weight increases.
It is false that Smaller masses experience more gravitational force than bigger masses.
When an asteroid moves away from our planet the gravitational attraction between it and the earth as it zooms away increases.
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In the diagram, q1=+6.25 * 10^ -8 C. What is the potential difference when you go from point A to point B? Include the correct sign , + or - .
Help please!!!!
Answer:
Moving a unit "positive" test charge from A to B will result in a reduction in potential
V = K Q / R potential at a point
V2 - V1 = K Q (1 / .4 - 1 / .15) = = k Q (.15 - .4) / .06 = -4.17 K Q
V2 - V1 = -4.17 * 9 & 10E9 * 6.25 E-8
V2 - V1 = -4.17 * 562.5 J/C
V = - 2346 Volts
Answer: – 2340
Explanation:
on accelus
[tex]help \: me \: pls \: [/tex]
plz..
Draw a diagram of what you think might happen when you mix hot and cold water samples.
Answer:
According to Goog|e, "Because the hot water will heat the cold water up and the cold water will cool the hot water down, the water samples will eventually have the same temperature when mixed. There is more energy in the hot water than the cold water. When the hot & cold water mix, the energy evens out so the temperature will be averaged."
Explanation:
Diagrams attached.
I hope this helps!
who is the founder of oersted experiment ?
Answer:
In 1820, Hans Christian Oersted(the founder) developed the oersted experiment to display a relationship between magnetism and electricity.
Explanation:
1.) How do you determine which between the two object has a greater amount of potential energy?
2.) How was potential energy changed into kinetic energy?
3.) What was the position or condition of the materials that possess kinetic energy?
Answer:
1- hight and mass
2- The force of gravity will transfer the energy to kenetic energy
3- Energy that is a moving object has due to its motion is Kinetic Energy.
Explanation:
differenciate between scalar and vector quantities.
thankyou ~
Answer:
A quantity that has magnitude but no particular direction is described as scalar. A quantity that has magnitude and acts in a particular direction is described as vector.
The difference between scalar and vector quantities is simply the direction we always consider when dealing with vector quantities.
SCALAR AND VECTOR QUANTITIESScalar quantities are those quantities that have only magnitude but no direction. Examples are;
speedTemperaturemassCurrente.t.cVector quantities are those quantities that have both magnitude and direction. Examples are;
VelocityForceAccelerationMomentume.t.cThe difference between scalar and vector quantities is simply the direction we always consider when dealing with vector quantities.
Therefore, direction is the difference between them.
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how long does it take a microwave of power 0.2kW to sue 10000 J of energy
Answer:
50s .
Explanation:
[tex]\frak{\pink{Given}}\begin{cases}\textsf{ The power of microvave is 0.2kW .}\\\textsf{ Amount of energy is 10000 J .}\end{cases}[/tex]
Here the power of the microwave is 0.2kW . And as we know that ,
Rate of doing work is called power .So from the definition , we have ;
[tex]\sf\longrightarrow Power =\dfrac{Work}{time}[/tex]
Here the work done is equal to the energy consumed by the microwave i.e. 10000 J .So we can write it as ,[tex]\sf\longrightarrow Power =\dfrac{Energy}{time}[/tex]
[tex]\sf\longrightarrow 0.2kW = \dfrac{10^4 J }{t} \\[/tex]
[tex]\sf\longrightarrow 0.2 * 1000 W = \dfrac{10^4 J }{t} [/tex]
Cross multiply ,
[tex]\sf\longrightarrow t = \dfrac{ 10^4 }{ 0.2 * 10^3}s=\dfrac{10^4}{2*10^2} s [/tex]
Simplify ,
[tex]\sf\longrightarrow \boxed{\bf t = 50s} [/tex]
Hence the time taken is 50s .How many ethic ties, former colonial alliances, and shared languages may effect international trade? Why?
Answer: In the 17th century, as European nations scrambled to claim the already occupied land in the “New World,” some leaders formed alliances with Native American nations to fight foreign powers. Some famous alliances were formed during the French and Indian War of 1754–1763.
Explanation:
[tex]\bold{ Choose \: the \: correct \: Answer \: :) \:}[/tex]
Answer:
B and B
Explanation:
Question 1:
The distance is a unit of length, such as miles, meters, kilometers
The correct answer for this question would be 8m
Question 2:
Speed has a unit of length per unit of time.
The correct answer for this would be meters per second
-Chetan K
does the speed of a EM wave depend on its frequency
Answer:
The speed of a wave is independent of its frequency and wavelength. A change in the frequency value will not result in a change in the speed value. Rather, changing frequency will cause a change in the wavelength in such a manner that the speed value turns out the same.
Explanation:
Answer:
no
Explanation:
If and object undergoes a change in momentum of 12 kg*m/s over a 10
second interval, what was the force exerted?
The magnitude of the force exerted on this object is 1.2 Newton.
Given the following data:
Change in momentum = 12 Kgm/s.Time = 10 seconds.What is impulse?In Science, the impulse that is experienced by an object is always equal to the change in momentum of the object, due to the force acting on an object.
Mathematically, impulse is given by this formula:
[tex]Impulse = change\;in\;momentum\\\\Force \times time = m \Delta V[/tex]
Substituting the given parameters into the formula, we have:
[tex]Force \times 10=12\\\\Force =\frac{12}{10}[/tex]
Force = 1.2 Newton.
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