vf = vi + at
vf = 0
a = - (to stop (deceleration))
input the value:
0 = 4 m/s -a.8
8a = 4
a = 0.5 m/s²
F = m.a
F = 75 kg x 0.5 m/s²
F = 37.5 N
A certain kind of light has a wavelength of 850 nm. What is the frequency of this light in hz?.
So, the frequency of that light approximately [tex] \sf{\bold{3.53 \times 10^{14} \: Hz}} [/tex]
IntroductionHi ! I will help you to explain the relationship between velocity of electromagnetic waves in a vacuum with frequency and wavelength. We all know that all of the type of electromagnetic wave, will have the same velocity as the speed of light (because the value is a constant), which is 300,000 km/s or [tex] \sf{3 \times 10^8} [/tex] m/s. As a result of this constant property, the shorter the wavelength, the greater the value of the electromagnetic wave frequency. This relationship can also be expressed in this equation:
[tex] \boxed{\sf{\bold{c = \lambda \times f}}} [/tex]
With the following condition :
c = the constant of the speed of light in a vacuum ≈ [tex] \sf{3 \times 10^{8} \: m/s} [/tex] m/s[tex] \sf{\lambda} [/tex] = wavelength (m)f = electromagnetic wave frequency (Hz)Problem SolvingWe know that :
c = the constant of the speed of light in a vacuum ≈ [tex] \sf{3 \times 10^{8} \: m/s} [/tex] m/s[tex] \sf{\lambda} [/tex] = wavelength = 850 nm = [tex] \sf{8.5 \times 10^2 \times 10^{-9}} [/tex] m = [tex] \bold{8.5 \times 10^{-7} \: m} [/tex]What was asked :
f = electromagnetic wave frequency = ... HzStep by step :
[tex] \sf{c = \lambda \times f} [/tex]
[tex] \sf{3 \times 10^8 = 8.5 \times 10^{-7} \times f} [/tex]
[tex] \sf{f = \frac{3 \times 10^8}{8.5 \times 10^{-7}}} [/tex]
[tex] \sf{f \approx 0.353 \times 10^{8 -(-7)}}} [/tex]
[tex] \sf{f \approx 3.53 \times 10^{-1} \times 10^{15}} [/tex]
[tex] \boxed{\sf{f \approx 3.53 \times 10^{14} \: Hz}} [/tex]
Conclusion :So, the frequency of that light approximately [tex] \sf{\bold{3.53 \times 10^{14} \: Hz}} [/tex]
See More :What affects photon energy https://brainly.com/question/26434060What is the foton energy https://brainly.com/question/26518899When considering the wavelength of a radio wave – like the kind you hear when listening to music as you drive along – you would be correct to think that the size is this wave is about as long as:.
The size of the wavelength of a radio wave is in the order of millions of meters.
What is a radio wave?Radio wave is part of the electromagnetic spectrum. The radio wave is known to travel across a long distance because it has a long wavelength. This means that it has a low energy.
Hence, the size of the wavelength of a radio wave is in the order of millions of meters.
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Answer: Building
Explanation: took a quiz :)
A spring has a spring constant of k = 50 N/m. The spring is compressed a distance of 31cm. What is the potential energy stored in the spring?
1.96 kg * m2/s2
Explanation:I'm assuming that you are asking what is the elastic potential energy stored in the spring at the position stretched by 16.5 cm...Since you know the spring constant k, 144 N/m and the spring stretch from the equilibrium position x, is 16.5 cm, or 0.165, you find the spring's potential energy from the equation PE = 12kx2, which equals 1.96 Joules, or kg * m2/s2 if you want SI units.
How can you remove energy from matter? Question 10 options: By increasing its volume By lowering its temperature By increasing its pressure By boiling it.
Answer: YA i got u!!! got 20/20, so its correct
Explanation:
By lowering its temperature, you can remove energy from matter.
What is thermal energy?Thermal energy is the energy that is generated by the movement of particles in matter. It is a form of kinetic energy that results from the motion of atoms or molecules in a substance. The faster the particles move, the more thermal energy they have. Thermal energy can be transferred from one substance to another by conduction, convection, or radiation. It is a fundamental aspect of many physical processes, including thermodynamics and heat transfer, and is central to the study of energy and its applications in science and engineering.
As the temperature of a substance decreases, the motion of its molecules and atoms also decreases, which results in a decrease in its thermal energy.
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1. A car slams on brakes and comes to a stop after having been traveling 40m/s. The car stops in
only 0.5s. What is the car's acceleration? (Units for acceleration should be typed as m/s/s right
next to the number!)
Answer:
-80 m/s/s
Explanation:
acceleration = (v final - v initial) / time
a = (0 m/s - 40m/s) / 0.5 seconds
a = - 40 m/s / 0.5 seconds
a = - 80 m/s/s
Water has 10 times the specific heat capacity compared to iron. How much water would be needed to absorb the same amount of heat as a piece of iron?
100 times the mass of iron
10 times the mass of iron
1/100th the mass of iron
1/10th the mass of iron
Answer: Water has 10 times the specific heat capacity compared to iron. How much water would be needed to absorb the same amount of heat as a piece of iron?
Explanation:
The answer is: 1/10th the mass of iron.
So sorry about that other clown above me, that point farming clown needs to gtfo off the internet.
A car drives at a velocity of 6.8 m/s for 250 seconds. How far did it travel?
[tex]\qquad \qquad\huge \underline{\boxed{\sf Answer}}[/tex]
Here's the solution ~
As we know, Displacement =
[tex]\qquad \sf \dashrightarrow \: velocity \times time[/tex]
[tex]\qquad \sf \dashrightarrow \: 6.8 \times 250[/tex]
[tex]\qquad \sf \dashrightarrow \: 1700 \: m[/tex]
OR[tex]\qquad \sf \dashrightarrow \: 1.7 \: km[/tex]
The car travelled 1700 meters ( 1.7 km )
A golf ball moving forward with a momentum of 1.0 kg m/s strikes and bounces backward off a heavy bowling ball that is initially at rest and free to move. The momentum of the bowling ball after collision is:_____.
Answer:
The same
Explanation:
Momentum is conserved before and after collision.
Hope this helps!
write short note on land and sea breeze. diagram needed
How many stars are in our solar system? Make your best guess.
Answer:
4.5 billion
Explanation:
There are many stars big and small so there must be billions
A satellite is launched from Earth into orbit. What happens to the mass and weight of the satellite?
Answer:
The mass of the satellite does not matter, as long as the ratio between the satellite's and the orbited object is small. On the other hand, if the masses are closer to each other, like the Earth and its Moon, then the model is more complicated.
Explanation:
PLS HELP I NEED TO TURN THIS IN SOON
The tendency of an object to resist a change in its motion is called
Answer:
inertia
Explanation:
The current that flows from and back to the power supply in a parallel circuit is called __________ current.
Answer:
mainline current
Explanation:
Current that flows from and back to the power supply in a parallel circuit. Fuse. A type of circuit protection device.
Mainline current
What is Kirchhoff law?
Kirchhoff's Current Law states that the total current entering a junction or a node equals the charge leaving the node as no charge is lost.
According to Kirchhoff Current Law for parallel circuits,
The pair of leads connecting all the branches to the voltage source terminals is the main line. All the current in the circuit must come from one side of the voltage source and return to the opposite side for a complete path. The amount of current in the main line is equal to the total of the branch currents. The total current that flows from the power supply and back.The total current in the main line is equal to the sum of the branch currents.This is known as Kirchhoff’s current law (KCL).It applies to any number of parallel branches, whether the resistances in those branches are equal or not.Therefore,
The current that flows from and back to the power supply in a parallel circuit is called Mainline current current.
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How can a mass be hot enough to flow but still act like a solid
This is a Science question about the layers of the earth...
A car starts from rest and speeds up to 30 m/s in a total of 6 s.
What is the acceleration?
1. 5m/s2
2. 30 m/s
3. 24 m/s2
4. 5 m/s
You push on a car and it doesn't move. What is true about inertia in this case?
a) The inertia is changing
b) The inertia of the car is too great
c) the inertia of the person is equal to the car
d) There is no inertia because there isn't any movement
Answer:
the answer is D
Explanation:
inertia is movement
A substances are composed
Substances are composed of atoms, although I'm not sure if this is what you mean
What is the correct definition of nuclear fission?.
Answer:
subdivision of a heavy atomic nucleus, such as that of uranium or plutonium, into two fragments of roughly equal mass.
Explanation:
A compass needle always points in a direction .........................
Answer:
Centre is the Answer hope its is right and helpfull
Two point charges of 9μC and 4μC are placed a distance of 4 m apart.
1) Calculate the magnitude of the force, in Newtons, on a positive 5μC charge at the midpoint between the two charges.
2) Find the point, measured in meters from the 9μC charge, between the two charges where the force on the 5μC charge is 0?
Hi there!
1)
Since the charge placed in the middle is positive, we know that the particle is being repelled.
The particle experiences a greater repelling force by the 9μC charge. We can use the equation for electric force:
[tex]F_E = \frac{kq_1q_2}{r^2}[/tex]
k = Coulomb's Constant
q₁, q₂: Charges (C)
r = distance between charges (m)
This is a VECTOR quantity, so we must subtract the forces since they point in opposite directions.
Force from 9μC particle:
[tex]F_E = \frac{k(.000005)(.000009)}{2^2} = .101\\\\[/tex]
Force from 4μC particle:
[tex]F_E = \frac{k(0.000005)(0.000004)}{2^2} = 0.0450[/tex]
Subtract:
[tex].101 - 0.0450 = \boxed{0.561 N}[/tex]
2)
We can find a position by setting the two equations equal to one another. (Both repelling forces must be EQUAL for the force = 0 N)
Let the distance between the 9μC and 5μC charge equal 'x', and the distance between the 4μC and 5μC charge equal '4 - x'.
[tex]\frac{k(0.000009)(0.000005)}{x^2} = \frac{k(0.000004)(0.000005)}{(4 - x)^2}[/tex]
Cancel out 'k' and the 5μC value.
[tex]\frac{0.000009}{x^2} = \frac{0.000004}{(4 - x)^2}[/tex]
Solve for 'x' using a graphing utility.
[tex]\boxed{x = 2.4 m}[/tex]
38.A student heard the echo of his voice from a nearby solid object after 2se. How far away
is the solid object? The speed of sound in air is 170m/s.
A. 85m
B. 170m
C. 300m
D. 340m
Answer:
B. 170m
Question explained in the photo attached
Hope it helped : )
What are you guys biggest fear?
Answer:
Dying
Explanation:
I know I am scared
What is the gravitational force between the sun and earth
Answer:
It's easier if you just read the explanation.
Explanation:
about 3.54x1022 N
The gravitational force between the Sun and the Earth is about 3.54x1022 N. This force keeps the Earth orbiting around the Sun.
Which arrow, A, B, or C, depicts the force of gravity on the thrown football?.
Gravitation is a natural law by which all things with all matter are attracted towards one another. gravity causes weight to all matter. Arrow A clearly depicts the effect of gravity.
What is gravity?Gravitation is a natural law by which all things with all matter are attracted towards one another. gravity causes weight to all matter and the gravity of the moon causes the ocean tides.
Gravity is responsible for large-scale structures present in the Universe. Gravity has an unlimited range, although its effects depend on the distance.
Distance is inversly propotional to the gravity acts on a matter.
Arrow a line is a complete verticle line on the y axis that depicts that the effect of gravity is maximum shown in arrow A. Hence arrow A clearly depicts the effect of gravity.
To learn more about gravity refer to the link;
https://brainly.com/question/1479537
Answer:
The answer is arrow A.
Explanation:
as the mass of an object increases, it’s inertia will
Answer:
Inertia is the property of mass that resists change. Therefore, it is safe to say that as the mass of an object increases so does its inertia.
Explanation:
In its orbit, Earth circles the sun once every year. This movement around the sun is called a(n) ________.
Answer:
Is called a(n) revolution
Explanation:
While you are standing on your front porch, you decided to walk to the end of your driveway, 10 meters away, and back to your front porch, what is your distance traveled and what is your displacement?
Answer:
Distance travelled: 20meters
Displacement: 10 meters.
Explanation:
In geometry and mechanics, a displacement is a vector whose length is the shortest distance from the initial to the final position of a point P undergoing motion. It quantifies both the distance and direction of the net or total motion along a straight line from the initial position to the final position of the point trajectory. A displacement may be identified with the translation that maps the initial position to the final position.
over all forces acting on a object after the all the forces are combined is called the ___________
Answer:
net force.
Explanation:
HELPPP PLEASE !!!
1. look carefully at the pair of images and think about what the arrow means.
which image ( A or B ) shows the direction someone would need to kick the ball in order to move it toward the goal?
Answer:
It is A that best describe it.
The image that shows the direction someone would need to kick the ball in order to move it toward the goal is image A.
We have,
The arrow in a diagram tells us the direction in which it will go.
Now,
From image A and image B,
Image A tells us that if we kick the ball in the right direction it will hit the goal.
Image B tells us that if we kick the ball in the left direction the ball will not hit the goal but go to the opposite direction.
Thus,
The image that shows the direction someone would need to kick the ball in order to move it toward the goal is image A.
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