The coefficient of linear expansion of the metal at the given length is determined as 3.75 x 10⁻⁴/⁰C.
Coefficient of linear expansion of the metalThe coeffcient of linear expansion of the metal is calculated as follows;
ΔL = αLΔT
α = ΔL/LΔT
Where;
α is the coefficient of linear expansionΔL is change in length = 20 mm - 18.5 mm = 1.5 mmΔT is change in temperature = 0 - (-200) = 200°CL is the original length = 20 mmα = (1.5)/(20 x 200)
α = 3.75 x 10⁻⁴/⁰C
The complete question is below:
A metallic axle with a diameter of 20mm has to be fitted into a wheel which has a circular hole at its center with diameter of 18.5mm. To fit the axle into the hole, the axle is dipped into liquid nitrogen at a temperature of -200°C. Calculate the coefficient of linear expansion of the metal.
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pleaseeee help mehhhh

Which of the following is a physical change?
sawing a piece of wood in half
O burning a piece of wood
O a copper statue turning from red to green
Orust forming on an iron fence
Answer:
I think its 'sawing a piece of wood in half'
Explanation:
sry if its wrong
is it second or first law
Answer:
In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration.
Explanation:
Help
Light helps you in so many ways. But, if it is not used properly, it can also be harmful to you. How can you use light safely? Provide at least five (5) ways how you will protect yourself from light energy.
Conservation efforts have been effective in _______.
a.
increasing the number of endangered species
b.
reducing all the negative impacts of human activity
c.
preserving wildlife habitats
d.
all of the above
Answer:
The answer is D. All of the above.
Explanation:
All of these were efforts and been effective.
Answer:
c
Explanation:
the only state of matter that is not a fluid is
Answer:
maybe the answer is solid state
a car weighting, 14500 N skids on ice, which has a kinetic coefficient of friction 0.2. It then hits a patch of dry road area which has a Kinetic coefficient of friction of 0.8. What is the change in friction force experienced by the car?
The change in friction force experienced by the car is
What is friction?The friction is caused between two uneven contacting surfaces.
When car is on ice, the friction force is
f = μ N
f₁ = 0.2 x 14500 = 2900N
When the car is on dry road, the friction force is
f₂ = 0.8 x 14500 =11,600 N
The change in friction force =11600 - 2900 = 8700N
Thus, the change in friction force experienced by the car is 8700N.
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Explain uses of conductors with either high or low resistance.
A body of mass 200gram is executing SHM with amplitude of 20mm. The magnitude of maximum force which acts upon it is 0.6N. Calculate its maximum velocity?
Given ,
Mass of the body (m) = 200g
Amplitude (A) = 20mm
Maximum force (F) = 0.6 N
Maximum velocity (vmax) =?
We know that
Fmax = mv2max/A
or , 0.6 = 200×10-3xv2max/20×10-3
or , 0.6×20/200= v2max
or , vmax = 0.24 m/s
∴ Maximum velocity = 0.24 m/s2
The value of maximum velocity will be 0.3464 m/s². Energy or work is equal to the product of force and displacement.
What is velocity?The change of distance with respect to time is defined as speed. Speed is a scalar quantity. It is a time-based component. Its unit is m/sec.
The given data in the problem is
Mass of the body is,(m= 200g)
Amplitude is,(A =20 mm)
Maximum force is,F= 0.6 N
To find;
Maximum velocity
Energy or work is equal to the product of force and displacement.
[tex]\rm KE = \frac{1}{2} mV_{max}^2 \\\\ \rm F_{max} \times A = \frac{1}{2} mV_{max}^2 \\\\ F_{max}= \frac{1}{2}\frac{ mV_{max}^2}{A} \\\\ 0.6= \frac{1}{2}\times \frac{ 0.2 \times V_{max}^2}{20 \times 10^{-3}} \\\\ V_{max}=0.3464 \ m/sec^2[/tex]
Hence,the value of maximum velocity will be 0.3464 m/s².
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A helium balloon has a pressure of 40 psi at 20°C. What will the pressure be at 40°C? Assume constant volume and mass.
Answer:
P V = N R T ideal gas equation
P2 / P1 = T2 / T1 where the other variables are constant
P2 = (T2 / T1) * P1 = (313 / 293) * 40 psi = 42.7 psi
As a pan is sitting on a stove it begins to heat up. Eventually it may get hot enough that it glows red, meaning it is radiating electromagnetic waves within the visible portion of the spectrum. What does this situation show us about electromagnetic radiation?
Electromagnetic radiation can only be emitted in the form of visible light.
The hotter an object is, the faster the electromagnetic radiation will travel.
The electromagnetic radiation emitted by an object is not affected by its temperature.
The hotter an object is, the greater the energy of the electromagnetic radiation in emits.
(100 POINTS AND BRAINLIEST)
1. What are the four groups of carbon compounds found in living things?
2. Classify each substance as either sugar, starch, protein, or nucleic acid.
a. the major compound that makes up the skin
b. glucose
c. the major compound in potatoes
d. DNA
3. What is the difference between saturated and unsaturated fat? Why are partially hydrogenated fats useful for making potato chips but not particularly healthy for humans to eat?
1. carbohydrates, lipids, proteins, and nucleic acids.
2. a is protein b is sugar c is starch and d is nuclear acid
3. What is the difference between saturated and unsaturated fat? it's that Saturated fats have the maximum number of hydrogens possible, while unsaturated fats have a double bond between two of the carbons. part 2. Why are partially hydrogenated fats useful for making potato chips but not particularly healthy for humans to eat? I was not able to find a different answer for it than part 1.
A student repeats a reaction several times to test the effects of various
changes on the reaction rate. The data table shows the results. How does
increasing the temperature of the system change thereaction rate?
A. Increasing the temperature decreases the reaction rate.
B. Increasing the temperature increases the reaction rate.
C. More information is needed to determine what happens to the reaction rate.
D. Increasing the temperature has no effect on the reaction rate.
Answer:
The correct answer is - C. Increasing the concentration increases the reaction rate.
Explanation:
Answer:
B. Increasing the temperature increases the reaction rate.
Explanation:
The reaction time column displays how long the reaction ran for. If a reaction rate was fast then time taken for reaction to run would be slow right?
Therefore, original condition had reaction time of 10 second, but increaseing temperature lowered the time to 5 second, which must mean that reaction rate increased.
Using the formula below, determine how
many seconds it would take for a satellite
traveling at 4 miles per second to travel
11,000 miles across the Pacific Ocean.
speed=
A 27.5 seconds
B 45 seconds
C 2,750 seconds
D 3,000 seconds
Why is impulse and momentum important in sports like cricket??
==============================
[tex] \large \sf \underline{Question:}[/tex]
Why is impulse and momentum important in sports like cricket??==============================
[tex] \large \sf \underline{Answer:}[/tex]
Impulse and momentum are important in sports like cricket because from the word "momentum" it describe itself like you're getting used of it or you know what to do like there's no stopping you.
==============================
How are impulse and momentum related?
brainly.com/question/2193212brainly.com/question/904448==============================
The horizontal surface on which the block slides is frictionless. The speed of the block before it touches the spring is 5.0 m/s. How fast is the block moving at the instant the spring has been compressed 15 cm? The spring constant k = 2000 N/m.
The block moving at instant the spring is compressed 15cm is √[(25m - 45)/m]
What is conservation of energy principle?When there is no external force acting on the system, the total mechanical energy remains conserved.
K.E i = K.E f + SPE
1/2 mu² =1/2 mv² + 1/2 kx²
Substitute u = 5m/s, k =2000N.m and x =0.15m, we get the final velocity
1/2 mu² =1/2 mv² + 1/2 kx²
v =√[(25m - 45)/m]
Thus, the block moving at the instant the spring has been compressed 15 cm is √[(25m - 45)/m]
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which vector has an x component with a length of 3?
Answer:
A) b.
Explanation:
all the details are in the attached picture.
An object with a mass of 10 kg is
dropped at the same time as an object with a mass of 100 kg. Assuming both objects are in free fall, explain how they will fall in comparison to one another.
Answer:
See below
Explanation:
They will fall at the same speed .....they will stay together if we ignore air friction
Before Schwarzschild, the understanding of relativity to gravitational force was unknown.
t or f
Answer:
False
Explanation:
The magnitudes of the electric potential and of the electrostatic force depend on which factors? O
A. Mass and distance O
B. Distance and amount of charge O
C. Density and amount of charge O
D. Mass and amount of charge
Answer:
Density and amount of charge O
4) The specific heat of aluminum is 0.88 J/g °C. How much heat is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?
4.40 J
568 J
440 J
Answer:
See below
Explanation:
The units of the specific heat hint at how to solve these types of problems
.88 J/(g-C) * 10 g * (100- 50 C) = 440 J
( see how the g and the C 'cancel out' ?)
The Venus flytrap is known for which of these behaviors?
closing its flower buds at night
snapping a leaf shut around an insect
closing its leaves when touched by a finger
screeching when in danger
BRAINLIEST IF ITS CORRECT HEPL
Answer: C.
Explanation: They describe the direction of the magnetic force on a north monopole at any given position.
a toy car needs a source of energy to move. how could you give gravitational potential energy to a toy car so that it will move when you let it go?
Answer:
wait one second im about to go get some milk im thirsty
Explanation:
do you want any chicken on your salad
A 0.03 kg baby sea turtle moves across the sand toward the ocean at 0.3 m/s. What is her kinetic energy in Joules?
Answer:
.00135 j
Explanation:
K.E. = 1/2 m v^2
= 1/2 * .03 * .3^2 = .00135 j
A sound wave travelling through water has a wavelength of 0.08m and a frequency of 18525 HZ. What is the speed of the wave?
a. 343 m/s
b. 1482 m/s
c. 5941 m/s
Answer:
1482m/s
Explanation:
velocity equals frequency x lamdha
What type of wave is illustrated below?
Longitudinal
Transverse
Surface wave
Seismic wave
Answer:
Longitudinal
Explanation:
I searched it up.
the diagram aeroplane banking to make a horizontal turn .The aeroplane is travelling at a speed of 75ms-1 and the radius of the turning circle is 800m
The centripetal acceleration of the aeroplane is determined as 7.03 m/s².
Centripetal acceleration of the aeroplaneThe centripetal acceleration of the aeroplane is calculated as follows;
ac = v²/r
where;'
v is the speed of the aeroplaner is the radius of the pathac = (75²)/(800)
ac = 7.03 m/s²
Thus, the centripetal acceleration of the aeroplane is determined as 7.03 m/s².
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A particle is in its state of uniform circular motion. prove that its projection along one of its diameter executes simple harmonic motion.
x = R Cos wt, if x = R at t = 0
Uniform circular motion means that w is a constant.Then v = dx/dt = Rw Sinwt
a = d²x/dt² = - Rw² Cos wt = -w² x
Hence its motion is a SHM. True or False: A bystander intervention is the term used to define when an individual actively moves in and changes the outcome of a situation.
Answer:
true
Explanation: