Answer:
b
Explanation:
The position of galaxies in the universe was once hypothesized to be
constant, but evidence gathered by Edwin Hubble indicated that many
galaxies are actually racing away from Earth at high speeds. Which
statement is best supported by this discovery?
A. Science is a body of knowledge that is a subject to change based on data.
B. A hypothesis can become a law.
C. Science is a body of knowledge based on the work of well-known scientists.
D. A hypothesis is the correct answer to a problem.
The position of galaxies in the universe was once hypothesized to be
constant, but evidence gathered by Edwin Hubble indicated that many
galaxies are actually racing away from Earth at high speeds. the
statement that is best supported by this discovery is Science is a body of knowledge that is subject to change based on data, therefore the correct answer is option A
What is the scientific claim?Scientific claims are statements made in science based on an experiment.
These Scientific claims are backed by the experimental data and their true results obtained from scientific investigation and experimentation.
The position of galaxies in the universe was once thought to be fixed, but Edwin Hubble's observations revealed that many galaxies are actually moving away from Earth quickly. The conclusion that this discovery best supports is that science is a body of knowledge that is subject to change based on data, so option A is the appropriate answer.
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A man carries a 25 kg box 5 meters across the room. How much work is being done?
Answer:
Given :-Mass = 25 kg
Height = 5 m
Acceleration due to gravity = 10 m/s
To Find :-Work done
Solution :-We know that
W = mgh
W = 25 × 5 × 10
W = 250 × 5
W = 1250 J
[tex] \\ \\ \\ [/tex]
A car has an acceleration of 1.5 m/s2. A net force of 2100 N is acting on the car. What is the mass of the car?
Answer:
Given
acceleration (a) =1.5ms2
Force(F) =2100N
R. t. c mass (m) =?
Form
F=ma(divided by m both sides)
m=F/a
m=2100/105
m=1400kg
mass of car =1400kg
Answer:1400kg
Explanation:
A ball is dropped over the edge of a building. How fast is the ball moving 2.0 seconds
after being dropped?
Answer:-20.m/s,drum
Explanation:
Write the cautions which are taken to keep the magnetic properties of magnetsa) Don’t hammer it b) don’t drop it c) don’t heat it d) all of these
PLS HELP GUYS ITS URGENTTT!! I AM IN CLASS ...PLEASE!!
Answer:
D
Explanation:
These all can impact the magnetic properties
the law of conservation of momentum states that, if left alone what happens to the total momentum of two interacting objects that make up a system
Answer:
It remains the same
Explanation:
At any point in time the total momentum of two objects interacting remains the same
This follows the laws of space(space is uniform)
Answer:
(Question) Which of these quantities is a vector?
(Answer) momentum
(Question) What is the representation of the momentum vector?
(Answer) an arrow
(Question) What is the formula for the momentum p?
(Answer) p=m⋅v
(Question) What happens to the total momentum in a system of two interacting objects when a net force is exerted upon the system?
(Answer) The total momentum is conserved.
(Question) What is the magnitude momentum of a 2 kg body that moves with a speed of 3 m/s?
(Answer) 6.0
Explanation:
just did the quick check UwU
HELP PLEASE!!!
a= ?
v=
r=
Answer:
[tex]a=\frac{v^2}{r}[/tex]
[tex]v=\sqrt{a*r}[/tex]
[tex]r=\frac{v^2}{a}[/tex]
Explanation:
This is the formula for centripetal acceleration in terms of the tangential velocity (v) and the radius of the circular motion (r). The expression for the acceleration is already given, so simply type it as shown:
[tex]a=\frac{v^2}{r}[/tex]
For the velocity (v) multiply by "r" both sides and then use the square root to solve for v:
[tex]a*r=v^2\\v=\sqrt{a*r}[/tex]
For the radius multiply both sides by r and then divide both sides by the acceleration (a) in order to isolate r completely:
[tex]a*r=v^2\\r=\frac{v^2}{a}[/tex]
4
Select the correct answer.
What does the number, or density, of field lines on a source charge indicate?
OA
direction of charge on the source charge
B.
amount of charge on the test charge
Oc.
amount of charge on the source charge
OD
direction of charge on the test charge
Reset
Next
Answer:
C. amount of charge on the source charge.
Explanation:
Electric field lines can be defined as a graphical representation of the vector field or electric field.
Basically, it was first introduced by Michael Faraday and it is typically a curve drawn to the tangent of a point is in the direction of the net field acting on each point.
The number, or density, of field lines on a source charge indicate the amount of charge on the source charge. Therefore, the density of field lines on a source charge is directly proportional to quantity of charge on the source.
A compass can be used to determine the presence of charge flow in a circuit.
-true
-false. only the bulbs can tell you if there is charge flow.
Answer:
False
Explanation:
A compass can be used to determine relative direction but not absolute direction.
What are the layers of the Sun, starting from the center and moving outward?
Answer:
There are three main parts to the Sun's interior: the core, the radiative zone, and the convective zone. The core is at the center. It the hottest region, where the nuclear fusion reactions that power the Sun occur. Moving outward, next comes the radiative (or radiation) zone.
Answer:
B.core, radiative zone, convective zone, and photosphere
Explanation:
Edge 2021
Can you please help me figure out the work for the missing quantities?
Answer: set up proportions
Explanation:
which structure is larger cell, organ , multicellular or cell structure
Answer:
organ is larger cell..............
Answer:
organ
Explanation:
HELP IM REALLY STRUGGLING WITH THIS!!1
Different isotopes of an element can exist. For example, Carbon can have a mass number of 12 or a mass number of 14. Carbon always has an atomic number of 6.
Describe the difference between these two isotopes of Carbon.
In your answer, compare the number of protons, neutrons and electrons.
Answer:
Carbon 14 has 2 more neutrons than Carbon 12
same number of protons and electrons if they are both neutral atoms (that is the + or - aspect)
Explanation:
Answer:
The difference is the number of neutrons they have.
Explanation:
The atomic number is the number of protons. The number of protons is what differentiates elements. The isotope number is the total weight of the atom, that is the protons plus the neutrons. Therefore the number of neutrons is equal to the atomic mass minus the atomic number. Electrons are generally equal to the number of protons, to balance the charge of the atom.
In short: the difference between the two isotopes is that one has more neutrons.
A mouse ran 25.45 meters in 11 seconds, stopped for 5 seconds to eat a piece of cheese, ran 2.5 meters in 1.2 seconds to hide behind a shelf, and finally ran another 9 seconds a distance of 15 meters to its home. Calculate the average speed of the mouse in m/s.
Lightning flashes and you hear a thunder clap for seconds later. the velocity of sound is 340 m/s. how far away did lightning strike ?
Answer:
For metric-system conversions, follow this method: Sound travels at about 340 m/s, so multiply the number of seconds you counted by 340, and you'll know how many meters away lightning struck. A three-second count, then, would place the lightning strike about 1,020 m away, or roughly 1 km.
Explanation:
hope it hep and if it doesnt sorry
The distance struck by the lighting flashes is 680 m.
The given parameters;
time taken to hear the thunder clap, t = 4 svelocity of sound, v = 340 m/sThe distance struck by the lighting is calculated by applying the principle of echo as follows;
[tex]v = \frac{2d}{t} \\\\2d = vt\\\\d = \frac{vt}{2} \\\\d = \frac{340 \times 4}{2} \\\\d = 680 \ m[/tex]
Thus, the distance struck by the lighting flashes is 680 m.
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A car is traveling on the highway at 28 m/s The driver sees a tree in the middle of the road and slams on the brakes. The car comes to a complete stop over a distance of 35 meters. What was the acceleration of the car as it was coming to a stop?
Answer:what are the answer options?
Explanation
chris and molly wins $2400 in a competition they share the money in the ratio2:3 how much money do they each receive ?
Answer:
chris gets 960 and molly gets 1440
Explanation:
add the ratio up and divide
2+3=5
2400/5=480
480x2=960
480x3=1440
960+1440= 2400
How much energy is transferred when the potential difference is 12V and the charge is 7.5C?
The energy is transferred when the potential difference is 12 volts and the charge is 7.5 C is 90 Joules.
What is energy?
In physics, energy is the capacity to carry out work. It might be potential, kinetic, thermal, electrical, chemical, radioactive, etc., among other types. Heat and work are other examples of energy being transferred from one body to another. Once it has been transmitted, energy is always allotted according to its nature. As a result, heat transmission could result in thermal energy while effort could provide mechanical energy.
Given the information in the question:
The potential difference, V = 12 Volts,
The charge, q = 7.5 C,
Calculate the energy, E by the formula given below,
E = [tex]VQ[/tex]
Substitute the values of charge and potential difference,
E = [tex]12*7.5[/tex]
E = [tex]90 Joules[/tex]
Therefore, the energy is transferred when the potential difference is 12 volts and the charge is 7.5 C is 90 Joules.
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A 350kg motorcycle is moving at 20m/s. It then speeds up to 30m/s. How much work did the engine do to accelerate?
Answer:
momentum= mass× velocity
=350kg (30-20) m/s
=3500kgm/s
Alex rides on a bike that starts from rest and accelerates to a speed of 20 m/s in 8 seconds. What is Alex’s acceleration?
Answer:
20m/s
Explanation:
Alex's acceleration is also Alex speed
The SI unit for energy is Newton true or false
Explanation:
false....it is joules
..........
The answer is false
The SI unit for energy is joules and not Newton. Energy can be described as the capability of an individual to perform work. Every day all living things carry out one form of work or the other. These might include walking, running, cooking, singing, driving etc. All these activities require energy, some require a whole lot of energy.
This is why the importance of energy for our day to day activities cannot be over emphasized.
Hence the SI UNIT for energy is joules.
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What happens when light runs into object
Explanation:
It depends on the object, actually. If the object is transparent or somewhat clear, the the light will end up refracting, or bending, through those clear objects. It can also bounce off objects, too. But, with some objects, the light can be blocked, or absorbed.
Answer:
See down below
Explanation:
When light hits glass or any other transparent material, it pass though. Some light is reflected off the object whereas the rest passes through and is refracted. As light passes through air and into another clear material it changes speed, and light is both reflected and refracted by the glass.When the light runs into a sold object, it prevents from going through it.
What word
When an object is vibrating, we say that it has energy in its kinetic energy___
completes the sentence?
Answer:
that is which produces Sound
Answer:
The right answer is "stores"
Explanation:
All objects that are moving will have some energy in their kinetic energy store.
True or False: Modulated waves can be analog or digital.
Answer:
True
Explanation:
Modulation waves(schemes) can be analog or digital. An analog modulation scheme has an input wave that varies continuously like a sine wave.