Answer:
it should be be 40 hope this helps
A train travels 4200 km in 90 hours. What is its speed?
Answer: I think its 120
Explanation: thx for the free points :)
1. How do we tell how much energy a ray of light has?
By it's temperature
By it's color
By it's brightness
2. Which of the following are common forms of energy released by electrons dropping from heightened energy levels?
Light, Heat
Motion, Sound
Light, Kinetic
Heat, Potential
4. Describe the shape of a field created by a bar magnet.
5. On a microscopic scale, the energy change in a system is described by a
A change in color or texture
Measuring the temperature
A chemical equation
An odor
6. The aurora borealis lights that appear in the northern hemisphere are caused by the interaction between what?
Ultraviolet radiation from the Sun and the pollution in the Earth's air
The reflected light off the moon and the scattering particles in the atmosphere
The charged particles from the Sun and natural magnetic field of the Earth
7. What happens to the atoms of a material when you run electricity through that material?
The bonds that hold the atoms together begin to stretch due to the electric current
The neutrons, having no charge, resist the flow the electric energy through the atom
The electricity only goes into atoms that have an overall electric charge of the same orientation of the electric flow
8. The amount of potential energy stored in a magnetic field depends on what?
The size of one magnetic pole
How close two magnet poles are to each other
The number of molecules magnetically aligned in a pole
Whether the pole is a North or South pole magnet
9. Compare and contrast microscopic and macroscopic energy transfer. Give at least three comparisons for each.
10. A plane is landing at an airport. The plane has a massive amount of kinetic energy due to it's motion. When the plane lands, it activates its brakes, causing it to slow down and eventually stop. The kinetic energy that the plane had is now gone. In keeping with the Law of Conservation of Energy, which of the following is the most likely explaination of what happened to that energy?
The brakes used a coil system to convert the kinetic energy into potential energy stored in the brakes
The kinetic energy of the plane gets pushed into the air in front of it due to drag forces, causing the air to move, thus transferring the kinetic energy from the plane to the air
The brakes create friction, which transformed the kinetic energy to heat energy that was dissipated to the surroundings
The kinetic energy is being converted into sound energy by the loud engines of the plane
Ce clasă ești sa văd daca te pot ajuta
Write a short paragraph that explains how a sport using a ball would be played differently on a planet of your choice. For example, how would gravity affect a basketball game on Saturn? Or how would gravity affect a baseball game on Mercury?
(Doesnt have to be a full paragraph answer I just need a gist of what it is)
on a different planet I would play a sport similar to soccer. The main difference is that there is zero gravity. To win the game u have to get the ball into the other person's net first.
Explanation:
I was just bored
Which organelle captures sunlight and helps in food synthesis?
Chloroplast
Mitochondrion
Nucleus
Ribosome
Answer: Chloroplast
Explanation: Chloroplasts work to convert the Sun's light energy into sugars that cells can use. It's like a solar panel that converts energy from sunlight into electric power.
In an experiment in which molten naphthalene is allowed to cool, the cooling curve shown below was obtained, the temperature 80∘C is known as
A. cooling temperature
B. boiling point
C. melting point
D. vaporization point
Answer:
pa heart follow back follow pa brainliest narin po if my answer is correct for you THANK
Explanation:
In an experiment in which molten naphthalene is allowed to cool, the cooling cur...
Question
In an experiment in which molten naphthalene is allowed to cool, the cooling curve in fig 5 was obtained, the temperature
80
∘
C.is known as
Options
A) cooling temperature
B) boiling point
C) melting point √√√√√√√√√√※※※ ↑↑ANSWER
D) vaporization point
A rubber band has a spring constant of 45 N/m. A classmate stretches it a length of 0.2 m before firing it at Mr. C. Ouch. Calculate the elastic
potential energy of the rubber band.
Answer:
0.9 JoulesExplanation:
Elastic potential energy of a spring= 1/2 × Spring constant × displacement²
following calculations you will get ur answer!!
PLS ANSWER FAST WILL GIVE BRAINLY!!!!! BUT ONLY IF YOU KNOW
what happens outside of the nucleus?
Answer:
electrons
Explanation:
i think this is right
How long does it take a 100 kg rocket to increase speed from 10
m/s to 200 m/s with a force of 250N?
Answer:
76 seconds
Explanation:
Using the formula t=vf-vo/a, where t=time, vf= final velocity, v0= initial velocity, and a= acceleration, we can solve for your problem.
Plug in known variables...
t=200-10/a
we can solve for a by using the formula F=ma where f=force, m= mass, and a=acceleration and rearranging it to solve for a.
a=F/m
Plug in known variables...
a=250N/100kg
a=2.5m/s^2
Plug in our newly found acceleration of 2.5 m/s^2 into our first equation and solve....
t=190/2.5
t=76 seconds
Which statement describes steps involved in the production of hydroelectric power?
A. Water falls down a pipe to generate electricity.
B. Potential energy of water is directly transformed into electrical energy.
C. Moving water turns a paddle wheel that helps generate electricity.
D. Falling water turns a turbine that helps generate electricity.
Please help would be greatly appreciated!!
Answer:
D. Falling water turns a turbine that helps generate electricity.
Explanation:
Here is the proof:
you walk 12 meters north, then 10 meters west. What is your displacement
Answer:
Your displacement is 15.62m NW
Explanation:
We can use the Phytagorean theorem to determine the displacement:
a^2+b^2=c^2
12^2+10^2=c^2
144+100=c^2
244=c^2
15.62=c
So your displacement is 15.62m NW
HELP WILL GIVE BRAINLIEST
Which of the following adaptations would most likely help an animal survive the stressful environmental conditions found in the
Arctic?
OA
Ducks have webbed feet and an elongated body
OB.
Rattlesnakes have modified scales on the tips of their tails that form a rattle.
OC.
Bats can emit high-pitched sounds and navigate by echolocation
OD.
Reindeer have dense, woolly fur and hooves with high traction
Answer:
Reindeer
Explanation:
High traction to walk on ice
Woolly fur to keep warm
Answer:
Reindeer have dense, woolly fur and hooves with high traction.
Explanation:
The cadmium in the control rods slows down a nuclear fission reaction by absorbing neutrons.
Please select the best answer from the choices provided
T
F
answer:
true
explanation:
cadmium is used during controlled reaction to produce energycredits: https://brainly.in/question/6969690Answer:
True!
Explanation:
cadmium is being used during controlled reaction which creates the energy!
I took this test! :3
Why is it important for body cell to have twice and many chromosomes as sex cells?
Answer:
Why sex cells only need half the number of chromosomes compared to other cells in the body? As gametes are produced, the number of chromosomes must be reduced by half. Why? The zygote must contain genetic information from the mother and from the father, so the gametes must contain half of the chromosomes found in normal body cells.
Explanation:
Brainliest Plzz
Answer:
During Mitosis, the chromosomes split at G2 Phase.
Changes in the Moon’s position as it revolves around the Earth results in more or less of the sunlight __________from the Moon being visible when observing the Moon from the Earth. This causes the Moon to appear to change shape from Earth. *
Answer:
reflection of the moon, or just reflection
Explanation:
when the sunlight hits the moon, it refects back to earth making the moon appear to glow
Answer:
reflecting
Explanation:
the sun's light reflects off the moon, making the moon visible
Can someone give me ideas to improve hearing aids in medical sector to help deaf people
Answer:
yeah sure they should have a guaranty and should be water proof
If Mars were 10 times closer to the Sun, then the Sun would attract Mars with
times
(less or more) force.
Answer:
more
Explanation:
The velocity does not change greatly between Mars and Venus —explained Dong— but Venus's closer proximity to the sun boosts the density by almost a factor of 4.5. This would mean that atmosphere on Mars would be lost even more rapidly than at its current position.
.............................................hi
Answer:
hiiiiiiiiiiiiiiiiiiiiiiiii
Answer:
hello
just answered for points
Year wise Percentage of Attendance in Senior Secondary Schools of India The given graph shows that the percentage of attendance is recorded with a gap of 5 years. The given table depicts, across time, from the year 2000 to 2015. During the 15 years, there is a steady and healthy increase in the percentage of attendance in ll the four types of schools. The increase in Convent-run schools is much higher compared to the other three types of schools. Initially, the village schools show a noticeably poor percentage of attendance and the General English Medium schools show less percentage of attendance compared to the Convent-run schools. All in all the continuous higher percentage indicates that the relevant authorities are learned about improving the education of the country. The poor attendance in the 2010 in the Government-run village schools shows a big leap in the year 2015, indicating that the Government must have taken an effective measure to improve literacy in the villages. Noteworthy increase in the attendance indicates solid infrastructure and focus towards the healthy growth of the corresponding authorities.
Explanation:
hope it helps you<3
7. Which best describes the energy change th pushes a large rock down a hill?
A: sound energy kinetic energy
B:, potential energy kinetic energy
C: kinetic energy mechanical energy
D: mechanical energy sound energy
Answer:
B
Explanation:
Gravitational Energy is the energy of position or place. A rock resting at the top of a hill contains gravitational Potential energy. Hydropower, such as water in a reservoir behind a dam, is an example of gravitational potential energy.
what is the rate of acceleration of a 2,000-kilogram truck if a force of 4,300 N is used to make it start moving forward
Why would a person who weights 100 lbs. on earth weight significantly More on Jupiter?
A. Jupiter has more gravitational force then earth
B.Jupiter is farther away from sun
C.Jupiter has no atmosphere
Im pretty sure the answer is A)
A 14-gauge copper wire of diameter 1.628 mm carries a current of 12.5 What is the potential difference across a 2.00 - m length of the wire? *p=1.47x10^-8
Answer:
[tex]V=1.76\times 10^{-4}\ V[/tex]
Explanation:
Given that,
The diameter of a wire, d = 1.628 mm
Radius, r = 0.814 mm = 0.000814m
Current, I = 12.5 mA
The length of the wire, l = 2m
The resistivity of the wire, [tex]\rho=1.47\times 10^{-8}\ \Omega-m[/tex]
We need to find the potential difference across the wire. We know that the resistance of the wire is given by :
[tex]R=\rho\dfrac{l}{A}[/tex]
Also, V = IR
[tex]\dfrac{V}{I}=\rho\dfrac{l}{A}\\\\V=\dfrac{\rho l I}{A}\\\\V=\dfrac{1.47\times 10^{-8}\times 2\times 12.5\times 10^{-3}}{\pi \times (0.000814)^2}\\\\V=1.76\times 10^{-4}\ V[/tex]
So, the potential difference of the wire is [tex]1.76\times 10^{-4}\ V[/tex].
A 2000 g of C 14 is left to decay radioactively the half-life of Corbin 14 is approximately 5700 years what fraction of that sample remain after 17,100 years
Answer:
1/8
Explanation:
17,100 years is 3 times the half-life of 5,700 years. After each half-life, half remains, so the amount remaining after 3 half-lives is ...
(1/2)(1/2)(1/2) = 1/8
1/8 of the sample remains after 17,100 years.
Answer:
1/8
Explanation:
A free body diagram represents all of the following except:
a)the object
b)forces as vectors
c)forces exerted by the object
d)forces exerted on the object
Answer:
c
Explanation:
A free body diagram doesn't show forces exerted by the object.
A free body diagram represents all the given choices except the one which is "forces exerted by the object"
Diagrams that represent the approximate magnitude as well as the direction of all pressures exerted on either an item throughout a particular condition.Drawing such a free-body schematic or the model seems to be a key step towards pattern recognition throughout mechanical because it allows you to see every one of the influences operating on a particular element.
Thus the above answer is right.
Learn more:
https://brainly.com/question/13191643
I know the answer but what type of energy is this.
Answer:
Elastic potential energy
Explanation:
Answer:
elastic energy
Explanation:
A car has a mass of 1,000 kg and accelerates at 2 m/s? What is the magnitude of the force acting on the car?
0500 N
O 500 kg
0 2,000 N
2.000 kg
A rectangular container of base 50 cm by 30 cm is filled with water to a
depth of 5 cm. How much is the pressure exerted at the base?
(Take pw= 1000 kg/m and g =10 m/s?)
Answer:
please find attached pdf
Explanation:
Given values are:
Height,
5 cm or, 0.05 mBase of container,
50 cmThe pressure exerted will be:
→ [tex]P = hdg[/tex]
By substituting the values, we get
[tex]= 0.05\times 1000\times 10[/tex]
[tex]= 500 \ Nm[/tex]
Thus the above answer is correct.
Learn more about pressure here:
https://brainly.com/question/26018692
!!!URGENT!!! Worth 100 points!!
A snail travels down the sidewalk at 25 mm/min for 4 minutes How far does the snail travel?
The snail would travel 100mm
Each minutes is 25mm and it took 4 minutes
4 x 25 = 100
or
25+25+25+25=100
3. What is the force acting on an object with a mass of 50kg and an acceleration of
10m/s2?
I
Answer:
500 Newtons
Explanation:
50 kg x 10 m/s squared
Which of the following best represents a chemical reaction?
A. Products + reactants
B. Products → reactants
C. Reactants
products
D. Reactants → products
Answer:
The answer to your question should be D.
Explanation:
reactants are on the laft side of arrow and products are on right side of arrow
The option that best represents a chemical reaction is Reactants → products. Thus, the correct option for this question is D.
What is a Chemical reaction?A chemical reaction may be defined as a methodology through which one or more substances that are also called reactants, are significantly transformed into one or more different substances which are known as products.
The involvement of these reactants and products are either chemical elements or compounds. The mass of the chemical reaction remains the same but the state of matter may be altered. Some chemical reactions also involved the utilization of catalysts in order to proceed with the reaction fast by lowering its activation energy.
Therefore, reactants → products is an option that best represents a chemical reaction. Thus, the correct option for this question is D.
To learn more about Chemical reactions, refer to the link:
https://brainly.com/question/11231920
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What is 1.2 x 10^5 in standard form?
The standard form of the given exponential function is 120000.
By putting the number as a base and the number of repetitions as a little number to its upper right, a representation of repeated multiplications of the same number is known as an exponential form.
It is simpler to write repeated multiplication using base and exponents in the exponential form.
The equation f(x) = aˣ, in which the input variable x appears as an exponent and a as the base, describes an exponential function.
So, the given exponential function is,
1.2 x 10⁵
Here, 10 is the base and 5 is the exponent.
10⁵ = 100000
Therefore, the standard form of the given equation is,
1.2 x 100000 = 120000
To learn more about exponential function, click:
https://brainly.com/question/29166310
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