Answer:
Explanation:
Newton's 2 nd law of motion tells that when equal torque is applied on object having higher moment of inertia , it will rotate slower .
Moment of inertia of boiled egg is higher because the whole egg rotates as s solid unit . Hence it will rotate slower or it rolls slower on an inclined surface .
In this way by applying Newton's law , we can identify raw or boiled egg .
You have a small object with 0.0020 C of electric charge and
another small object with 0.0060 C of charge. Compare the
magnitude of the electric force that the 0.0020-C object exerts
on the 0.0060-C object to the force that the 0.0060-C object
exerts on the 0.0020-C object. Explain your answer.
we can say that the magnitude of the electric force is the same, but the direction of the force is opposite.
The electric force between two point charges is described by Coulomb's law.
If two charges, q1 and q2, are separated by a distance r, the force exerted on q2 by q1 is given by F= kq1q2/r^2
where k is the Coulomb constant.
One has 0.0020 C and the other has 0.0060 C.
It is required to compare the magnitude of the electric force that the 0.0020-C object exerts on the 0.0060-C object to the force that the 0.0060-C object exerts on the 0.0020-C object.
The magnitude of the force that each charge exerts on the other is the same, but the direction of the force is opposite. In other words, the force is a vector quantity.
The magnitude of the force between two point charges q1 and q2 is given by the following equation:
F=k|q1||q2|/r² where k is the Coulomb constant, r is the distance between the two charges, and |q1| and |q2| are the magnitudes of the two charges.
The magnitude of the force between two point charges is proportional to the product of the two charges and inversely proportional to the square of the distance between them.
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Two pistons are in an enclosed volume with fluid in between them, such that
movement in one piston affects the location of the other piston, as shown in
the image below. If an explosion occurs in the piston on the left such that it
moves 1 m, what is the distance that the piston on the right will move
(assuming that friction can be neglected)? (Recall that work on an object is
equal to the force on the object times the distance it is moved, and that work
is conserved.)
Cross-sectional area - 25 mm
Cross-sectional area = 0,5 m
A. 2 m
B. 0.5 m
C. 1 m
D. 0.25 m
Answer:
The pressure in the fluid just below Piston 1 is
p_1=F_1/A_1=361\text{ Pa}.p
1
=F
1
/A
1
=361 Pa.
The pressure in the fluid just below Piston 2 is the same according to Pascal's law:
p_2=p_1=361\text{ Pa}.p
2
=p
1
=361 Pa.
The force being exerted on Piston 2 to keep the two pistons in equilibrium is
F_2=p_2A_2=330\text{ N}.F
2
=p
2
A
2
=330 N.
Explanation:
A wave has a speed of 500 m/s and a frequency of 25 Hz. What is the wavelength of this wave in metres?
Answer:
20 mExplanation:
The wavelength of a wave can be found by using the formula
\(\lambda = \frac{c}{f} \\\)
where
c is the speed of the wave
f is the frequency
From the question
c = 500 m/s
f = 25 Hz
We have
\( \lambda = \frac{500}{25} \\ = 20\)
We have the final answer as
20 mHope this helps you
A 79. 5-inch strip of metal is bent into a circular hoop. A straight line is drawn from one side of the hoop to the other, passing through the center. What is the length of that line?
The length of the straight line drawn from one side of the hoop to the other, passing through the center, is approximately 25.3 inches.
To find the length of the line, we need to find the diameter of the circle, which is the straight line drawn from one side of the hoop to the other, passing through the center.
The circumference of the circle is equal to the length of the strip of metal, which is 79.5 inches. The formula for the circumference of a circle is C = πd, where C is the circumference and d is the diameter. We can rearrange this formula to solve for the diameter:
d = C/π
Substituting the given values, we get:
d = 79.5/π
d ≈ 25.3 inches
Therefore, the length of the line, which is the diameter of the circle, is approximately 25.3 inches.
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A weightlifter raises a 50kg weight to a height of 2m in 2 minutes. What was the power spent by the weightlifter?
Answer:
117.72kW
Explanation:
Given data
Mass m= 50kg
height x = 2m
time taken = 2 minutes= 129 seconds
let us find the work done
WD= force * distance
WD= mgx
WD= 50*9.81*2
WD= 981 Joules
Let us find the power
Power= work * time
Power= 981*120
Power= 117720
Power= 117.72 kW
Hence the power spent is 117.72kW
What do we call the energy that is transferred to
a substance without the substance's temperature
changing?
Answer:
Latent heat
Latent heat is the heat needed to change a state without a change in temperature.
Explanation:
Hope this helps :D
how can you take my step sis out the washer machine?
From what I have seen, you do not take your step sis out of the washing machine, you ask her if she has games on her phone and play mine craft like a god obv.
22) Gravitational force on Earth is obvious due to the size of Earth vs all the objects on Earth. The level of gravitational pull is different in space. What causes the difference?
The absolute brightness of a star depends on its _____.
a. size and temperature
b. distance an temperature
c. color and temperature
d. distance and color
Option A. The absolute brightness of a star depends on its size and temperature
What is the absolute brightness of a star
The absolute brightness of a star is the amount of light it emits at a standard distance from Earth, regardless of how far away it actually is.
The size and temperature of a star are the primary factors that determine its absolute brightness. The size of the star affects the amount of light it emits, with larger stars emitting more light. The temperature of a star affects the color of the light it emits, with hotter stars emitting bluer light and cooler stars emitting redder light. Both of these factors play a significant role in determining a star's absolute brightness.
Distance and color can also affect a star's brightness, but in different ways. The distance of a star affects its apparent brightness as seen from Earth, but not its absolute brightness. The color of a star can provide information about its temperature and composition, but does not directly determine its absolute brightness.
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What is the estimated density of the table tennis ball? Record your answer to the nearest hundredth.
g/cm3
What is the estimated density of the golf ball? Record your answer to the nearest hundreth
Explanation:
is there any Photo or anything?
Based on what you have learned about buoyant forces and the weight of displaced liquids, what is the weight of the displaced mystery fluid?
The buoyant force on an object is equal to the weight of the fluid displaced by the object.
When a body is partly or completely immersed in water (or any other liquid), then according to archimedes principle.
Loss in weight of body = Weight of water (liquid) displaced by the body = Buoyant force or upthrust exerted by water (any liquid) on the body.
Hence, the relationship between buoyant force and the weight of liquid displaced is that they are equal
what is buoyant force?
The upward force, or buoyant force, that acts on an object in water is equal to the weight of the water displaced by the object.
Any object that is in water has some buoyant force pushing up against gravity, which means that any object in water loses some weight.
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Arthur puts new batteries in his flashlight before leaving the house. Until the batteries die, it draws 0.25 A of current, allowing a total of 6,812 C of charge to. flow in the circuit. How long will Arthur be able to use the flashlight before the batteries'energy is depleted?
Given,
The current, I=0.25 A
The total charge flowing in the circuit is q=6812 C.
The electric current can be defined as the time rate of flow of the charges.
Thus, the electric current is given by,
\(I=\frac{q}{t}\)Where t is the time duration.
\(\begin{gathered} 0.25=\frac{6812}{t} \\ t=\frac{6812}{0.25} \\ =27248\text{ s} \end{gathered}\)Thus the batteries will fry out after 27248 s
the ________ magnitude of a star depends directly upon its luminosity and distance.
The Apparent magnitude of a star depends directly upon its luminosity and distance. Option D is correct.
What is the greatness of a star model?A celestial object with a positive number higher than one is fainter; whereas a brighter celestial object indicates a negative number that is higher. For instance, Venus has a magnitude of -4.6 at its brightest point, while the faintest star that can be seen by the eye has a magnitude of +6.0.
Apparent Magnitude:The brightness of a star or other astronomical object seen from Earth is measured in apparent magnitude (m). An item's clear greatness relies upon its natural glow, its separation from Earth, and any eradication of the article's light brought about by interstellar residue along the view to the eyewitness.
Incomplete question:
The _____ magnitude of a star depends directly upon its luminosity and distance.
a. absolute
b. bolometric
c. visual
d. apparent
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Please someone help me.
is the block of wood at rest or in motion?
refer to the figure below draw the forces acting on the block of wood use the gas as the origin of the forces.
thank you very much for answering this.
Answer:
1) The block of wood is at rest.
2) Weight and Normal Reaction (see attached diagram).
Explanation:
Assumptions
The block of wood is a particle (a body whose mass acts at a point, so its dimensions don't matter).There are no other external forces involved.Question 1
"At rest" or "resting" means that the object isn't moving.
Therefore, the block of wood is at rest.
Question 2
Forces that are acting on the block of wood:
Weight (W): Due to the particle's mass, m, and the acceleration due to gravity, g: W = mgSee attached diagram.
What does it cost to charge an electric car at a charging station?.
Answer:
A small car could cost about $11.50 to $23 to fully charge while a bigger or long-distance vehicle could cost between $22.50 to $45.
Explanation:
What would most likely be included in the "Analysis" section of a lab report?
O a discussion of any errors in the experimental data
a list of the supplies that were used in conducting the experiment
Osuggestions for new experiments based on the results
Oa description of what the dependent and independent variables were
The "Analysis" section of a lab report would most likely includes:
a. a discussion of any errors in the experimental datad. a description of what the dependent and independent variables were.What components are typically found in the "Analysis" section of a lab report?In the "Analysis" section of a lab report, it is common to discuss any errors or uncertainties that may have affected the experimental data. This may involve identifying sources of systematic and random errors and discussing their potential impact on the results.
Also, the section would typically describe the dependent and independent variables used in the experiment, providing a clear understanding of the factors being investigated and manipulated. By addressing these aspects, the "Analysis" section helps to evaluate the reliability and validity of the experimental findings.
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Two carts connected by a 0.25 m spring hit a wall, compressing the spring to 0.1 m. The spring constant k is 100 N m . What is the elastic potential energy stored from the spring's compression?
Given that,
Initial position of the spring, x₁ = 0.25 m
Final position of the spring, x₂ = 0.1 m
The spring constant of the spring, k = 100 N/m
To find,
The elastic potential energy stored from the spring's compression.
Solution,
The work done in moving a spring from on position to another is stored in the form of elastic potential energy. It can be given as follows :
\(E=\dfrac{1}{2}k(x_2^2-x_1^2)\\\\=\dfrac{1}{2}\times 100\times (0.1^2-0.25^2)\\\\=2.62\ J\)
So, the required energy is 2.62 J.
Answer:
1.125 J
Explanation:
The correct answer is 1.125 J
Please pick the best TWO choices for the following statement:
Some fats are good for you like ______ & ________.
A.
Monounsaturated
B.
Hydrogenated
C.
Polyunsaturated
D.
Saturated
Some fats are good for you like Monounsaturated ( A ) and Polyunsaturated ( C ) fats.
Monounsaturated and Polyunsaturated fats lower the risk of disease. These are good unsaturated fats. Foods that are rich in good unsaturated fats are fish, seeds, nuts and vegetable oils. Some of the vegetable oils that are good for health are olive, canola, sunflower, soy and corn oil.
Hydrogenated oil produces trans fat. If trans fat is taken even in small quantities, it increases disease risk. Food items rich in saturated fats are butter, cheese, ice cream, coconut oil etc. Eventhough these are not as harmful as trans fats, it is better to be consumed in moderate quantities.
Therefore, some fats are good for you like Monounsaturated ( A ) and Polyunsaturated ( C ) fats.
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In a class demo, Stan blew over the top of a piece of paper which made the paper rise. Why did the paper rise?
In the class demo, when Stan blew over the top of a piece of paper, it made the paper rise. The paper rose due to Bernoulli's principle,
According to Bernoulli's principle The total mechanical energy of the moving fluid comprising the gravitational potential energy of elevation, the energy associated with the fluid pressure and the kinetic energy of the fluid motion, remains constant.
Bernoulli's principle states that as the speed of a fluid (in this case, air) increases, its pressure decreases. When Stan blew over the top of the paper, the air speed increased, causing the air pressure above the paper to decrease. This created a pressure difference between the top and bottom of the paper, causing the paper to rise.
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How to Tell If an Element Is Paramagnetic or Diamagnetic
To determine if an element is paramagnetic or diamagnetic, one can perform a magnetic susceptibility test.
Paramagnetic and diamagnetic elements refer to the magnetic properties of elements and molecules. Paramagnetic materials are attracted to a magnetic field, while diamagnetic materials are repelled by a magnetic field.
Paramagnetic substances have a positive magnetic susceptibility, meaning they are attracted to a magnetic field and experience an increase in magnetic polarization. Diamagnetic substances have a negative magnetic susceptibility, meaning they are repelled by a magnetic field and experience a decrease in magnetic polarization.
Another way to determine the magnetic properties of an element is to observe its behavior in a magnetic field. If an element experiences attraction to a magnetic field, it is paramagnetic, and if it experiences repulsion, it is diamagnetic.
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define mechanical advantage
Answer:
Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system. The device trades off input forces against movement to obtain a desired amplification in the output force. The model for this is the law of the lever
Explanation:
How does the newton law work
Answer:
The first law is that if no force acts on an object, its motion will not change. In the second law, the force acting on an object is equal to its mass and acceleration. The third law is that when two objects interact, they act on each other with equal magnitude and opposite forces.
A device with a wire coal that is mechanically rotated through a
Answer:
A generator is a device that converts mechanical energy into electrical energy by rotating a coil of wire in a magnetic field.
If you divide a force measured in newtons (1 new-
ton = 1 kg•m/s?) by a speed expressed in meters per
second, in what units will the answer be expressed?
um I don't remember how to do this, help :(
Pressure is a measure of force per unit area:
P = F/A
The water exerts a pressure of 202 kPa = 202,000 Pa on the diver, who has a surface area of 1.50 m². Then the force exerted by the water is F such that
F = PA
F = (202,000 Pa) (1.50 m²)
F = 303,000 N = 303 kN
a 5.00 N salmon named sammy, swims 20 M upstream against a current that provides a resistance of 1.50 N. This portion of the stream rises at an angle 10 degrees with respect to the horizontal.
a) how much work is done by the sammy against the current?
b) what is the gain in PE by sammy?
c) what is the total work that must be done by sammy?
d) if sammy takes 40 S to swim the distance, what power does sammy have to exert to do so?
a) 67.96 J work is done by the Sammy against the current.
b) 3.46 m is the gain in PE by Sammy.
c) 85.06 J is the total work that must be done by Sammy.
d) If Sammy takes 40 S to swim the distance, 85 power does sammy have to exert to do so.
a) The work done by Sammy against the current is given by the formula:
Work = force × distance × cos(theta)
where force is the net force acting on the salmon, distance is the distance travelled by the salmon, theta is the angle between the force and the direction of motion.
Here, the net force acting on Sammy is:
force = 5.00 N - 1.50 N = 3.50 N
The distance travelled by Sammy is 20 m. The angle between the force and the direction of motion is 10 degrees.
Therefore, the work done by Sammy against the current is:
Work = (3.50 N) × (20 m) × cos(10 degrees)
= 67.96 J (Joules)
b) The gain in potential energy by Sammy is given by the formula:
PE = mgh
where m is the mass of the salmon, g is the acceleration due to gravity, and h is the height gained by Sammy.
Here, the height gained by Sammy is the vertical distance travelled while swimming upstream against the current. This distance is given by:
h = distance × sin(theta)
= 20 m × sin(10 degrees)
= 3.46 m
Therefore, the gain in potential energy by Sammy is:
PE = (5.00 N ÷ 9.81 m/s^2) × (3.46 m) × 9.81 m/s^2
= 17.10 J (Joules)
c) The total work that must be done by Sammy is the sum of the work done against the current and the gain in potential energy:
Total work = Work against current + PE gain
= 67.96 J + 17.10 J
= 85.06 J (Joules)
d) The power that Sammy must exert to swim upstream against the current is given by the formula:
Power = work ÷ time
where work is the total work done by Sammy, and time is the time taken to swim the distance.
Here, the total work done by Sammy is 85.
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in of the Solar System
When the ancient Greeks looked at the night sky they noticed that some points of light seem to wander" in the sky
Which term do we use for these wanderers today?
nebulae
moons
stars
1 planets
2 moons
3 stars
4 Planets
Answer:
stars #3
Explanation:
they didn't know it was stars
what spectral features allow you to differentiate the product from the starting material? (see last page of lab handout)
Spectral features that allow the differentiation of the product from the starting material can be identified using various techniques such as infrared spectroscopy and nuclear magnetic resonance spectroscopy.
The chemical structure of a substance determines its spectral features, making it possible to differentiate it from other substances. Spectroscopic techniques like nuclear magnetic resonance (NMR) and infrared (IR) spectroscopy can be used to identify different types of molecular bonds, enabling the differentiation of different types of chemicals.NMR spectroscopy enables the determination of the types of atoms in a substance by analyzing the radiation emitted by the nucleus of the atom. On the other hand, IR spectroscopy identifies the types of chemical bonds in a substance by analyzing the infrared radiation absorbed by the sample.
Spectral features that differentiate the product from the starting material can be identified using various techniques such as infrared spectroscopy and nuclear magnetic resonance spectroscopy. NMR spectroscopy can determine the types of atoms in a substance by analyzing the radiation emitted by the nucleus of the atom, while IR spectroscopy can identify the types of chemical bonds in a substance by analyzing the infrared radiation absorbed by the sample. The chemical structure of a substance determines its spectral features, enabling its differentiation from other substances.
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Calculate the work done if a boy lifts a bag of cement 500N to the floor of a lorry 2.5m above the ground
Answer:
W = 1250 J = 1.25 KJ
Explanation:
The work done by the boy is due to the change in the position of the cement vertically. Hence, the work done in this case will be equal to the potential energy of the cement:
\(W = P.E\\W = mgh\)
where,
W = Work done = ?
mg = W = weight of cement = 500 N
h = height covered = 2.5 m
Therefore,
\(W = (500\ N)(2.5\ m)\)
W = 1250 J = 1.25 KJ
An internal combustion engine has an efficiency of 22.3%. This engine is used to deliver 6.25 x 104 J of work to drive the motion of the train. What is the total energy that needs to be put into the engine.
Answer:
Only about 12%–30% of the energy from the fuel you put in a conventional vehicle is used to move it down the road, depending on the drive cycle. The rest of the energy is lost to engine and driveline inefficiencies or used to power accessories. Therefore, the potential to improve fuel efficiency with advanced technologies is enormous.