how does a hammer gives force to a hot iron when we hit it to make a weapon

Answer:

Reflection

Explanation:

The particles in the atmosphere only reflect the color blue and and all others are absorbed. Only the reflected colors can be seen from our eyes not the absorbed ones

The coordinate axes are X and Y. The X-axis is the horizontal line that goes from left to right, while the Y-axis is the vertical line that goes from bottom to top.

The point where they intersect is known as the origin. Each point on the grid is identified by its coordinates, which are written in the order (x, y), with the x-coordinate representing the horizontal position and the y-coordinate representing the vertical position. The x-coordinate increases from left to right, and the y-coordinate increases from bottom to top. Therefore, the point in the bottom left corner would be (0, 0), and the point in the top right corner would be (10, 10).The grid is made up of 100 square cells that are all the same size. Each cell is assigned a unique pair of coordinates, and all points on the grid can be identified using these coordinates.

The grid is commonly used to represent data in various fields, including mathematics, science, and computer science.

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Answer:

The first graph

Explanation:

Graph A shows acceleration.

Answer:

Displacement

Explanation:

Velocity is more like displacement because

Both have an arrow above their signs which indicates they are vectors.

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Answer:i f I understand your question correctly, the formula is as follows:

Note: The sign convention is based on distances which are measured from the lens to the object or image of regard. Distances measured in the same direction the light is moving are positive and distances measured in the opposite direction the light is moving are negative.

The measurements are in meters

The “ambient” index of refraction is assumed to be n=1.00

The inverse of the object distance plus the dioptric power of the lens (convex—positive and concave—negative) equals the inverse of the image distance.

Or 1/Od +Dl =1/Id

Please note, it has been a long time since I thought about teaching this concept to students.

Explanation:

Answer:

Pepsi- 660 Calories

Hot Dog- 3 Calories

Popcorn- 210 Calories

Total Calories in all 3 - 873 Calories

Answer:

It will take 30 seconds to reach the ground, and it will be travelling at 294 m/s when it does so. This means that its average velocity was 147 m/s.

Explanation:

\(d=v_ot+\dfrac{1}{2}at^2\)

Since the initial velocity of a dropped object is 0, we can make this the equation:

\(d=\dfrac{1}{2}at^2 \\\\4410=\dfac{1}{2}(9.8)t^2 \\\\t^2=900\)

\(t=30\text{ seconds}\)

The final velocity can be calculated with the formula:

\(v_f=v_o+at\)

Once again, since there is no initial velocity:

\(v_f=at \\\\v_f=(9.8)(30)=294m/s\)

Since the initial velocity is 0, the average vertical velocity is 294/2=147 m/s.

Hope this helps!

Answer:

its D

Explanation:

The kinetic energy is the energy of motion.

The energy an object has as a result of motion is known as kinetic energy. A force must be applied to an object in order to accelerate it. We must put in effort in order to apply a force. After the work is finished, energy is transferred to the item, which then moves at a new, constant speed.

An item in motion has energy, which is called kinetic energy. Motion in space, you walking down the street, and the rotation of the planet around the sun are all examples of kinetic energy. Kinetic energy has the following formula: K.E. = 1/2 m*v², where m is the object's mass and v is its square velocity.

Any object in motion is using kinetic energy, so the energy of motion is

kinetic energy.

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The volume of the heated balloon = 3.08L

What is Charlee's Law?

Charlee's Law is a law in the United States that was passed in 2015 in honor of Charlee Campbell, a six-year-old girl who tragically died due to medical negligence. The law provides legal protection for children who are victims of medical malpractice or negligence. It requires that hospitals and other medical facilities take steps to prevent medical errors and notify parents or guardians prior to any medical treatment. It also requires medical practitioners to use a standardized system for documenting and communicating medical information, and for health care providers to complete annual training on preventing medical errors. Charlee's Law is an important step forward in protecting the rights of children in the medical setting.

You will need to use Charles' law to solve this problem. The equation is

V1/T1=V2/T2

V1 =2.50L

T1=323K

v2=?

T2=398K

Therefore V2 = V1T2/T1

  = (2.5  × 398 )/ 323

 = 3.08L

Therefore the volume of the heated balloon   = 3.08L

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Answer:

The normal force must equal the weight.

Explanation:

Hope this helps..

Answer:

A student becomes negatively charged because of the friction between his socks and the carpet. ... The electrons get rubbed and move towards the carpet so the carpets electrons move away and the student becomes negatively charged.

A radio wave travels at the speed of light, which is equal to approximately 300,000 km/s.

So, to travel a distance of 998.25 km, the time needed is:

Therefore the time required is approximately 3327.5 microseconds.

The electron energy will be\(E = -1.442 x 10^-18 J x 10^18 = -1.442 aJ\) (approx.)

The energy (E) imparted to an electron as it flows through a battery can be calculated using the following equation:

\(E = qV\)

where q is the charge of the electron and V is the voltage of the battery.

The charge of an electron is \(-1.602 x 10^-19\) coulombs (C), and the voltage of the battery is 9 volts (V).

Therefore, the energy imparted to an electron is:

\(E = (-1.602 x 10^-19 C) x (9 V) ≈ -1.442 x 10^-18 joules (J)\)

To convert this to joules (10^-18 J), we can multiply by \(10^18\):

\(E = -1.442 x 10^-18 J x 10^18 = -1.442 aJ (approx.)\)

Note that the negative sign indicates that the electron loses energy as it flows through the battery, due to the conversion of electrical potential energy to other forms of energy (such as heat or light) within the battery.

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Water boiling at 100 degrees Celsius is an example of a physical change known as vaporization or boiling.

At this temperature, the liquid water absorbs heat energy and undergoes a phase transition, transforming into water vapor or steam. The process occurs when the vapor pressure of the liquid equals the atmospheric pressure.

During boiling, the intermolecular forces between water molecules are overcome, leading to the formation of gas-phase molecules. This transition is accompanied by the absorption of heat energy, which increases the kinetic energy of the water molecules.

Boiling is an essential phenomenon in various applications, such as cooking, steam generation, and distillation. It plays a crucial role in many natural processes, including the water cycle.

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We have that for the Question it can be said that The maximum height reached  by the first object will be  100 times  that of the other.

From the question we are told

One object is thrown vertically upward with an initial velocity of 100 m/s and  another object with an initial velocity of 10 m/s. The maximum height reached  by the first object will be

that of the other.

a. 10,000 times

b. none of these

c. 1000 times

d. 100 times

e. 10 times

Generally the equation for the velocity is mathematically given as

\(v=\frac{d}{t}\\\\Where\\\\\frac{H_{max}_1}{H_{max}_2}=\frac{(V_1)^2}{(v_2)^2}\\\\\frac{H_{max}_1}{H_{max}_2}=\frac{10000}{(10}\\\\\)

\((H_{max})_1=100*(H_{max})_2\)

Therefore

The maximum height reached  by the first object will be  100 times  that of the other.

\((H_{max})_1=100*(H_{max})_2\)

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answer:

9

Explanation:

add them all together then divide

The law of conservation of momentum states that the total momentum of a system before an event will be equal to the total momentum of the system after the event. That is, the total momentum of a system always remains the same.

In the equation,

If P₁ represents the momentum of object 1 before the event (say, collision) and P₂ represents the momentum of object 2 before the event. Then, P'₁ and P'₂ will represent the momentum of object 1 and object 2, respectively, after the event.

Visible light covers a tiny fraction of the electromagnetic spectrum

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Answer:sorry i am only in 6 grade but this is a explanation

Explanation:Matter cannot be created or destroyed in chemical reactions. This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions.

Answer:

Depending on the relative position of the Earth the Sun and Neptune in the Earths orbit the distances are;

The closest (minimum) distance of Neptune from the Earth is 29 AU

The farthest (maximum) distance of Neptune fro the Earth is 31 AU

Explanation:

The following parameters are given;

The distance from the Earth to the Sun = 1 AU

The distance of Neptune from the Earth = 30 AU

We have;

When the Sun is between the Earth and Neptune, the distance is found by the relation;

Distance from the Earth to Neptune = 30 + 1 = 31 AU

When the Earth is between the Sun  and Neptune, the distance is found by the relation;

Distance from the Earth to Neptune = 30 - 1 = 29 AU

Therefore, the closest distance from Neptune to the Earth in the Earth's Orbit is 29 AU

The farthest distance from Neptune to the Earth in the Earth's orbit is 31 AU.

Answer:

29 AU

Explanation:

Answer:

19.2 m/s

Explanation:

From the question,

Velocity = displacement/time = d/t

V = d/t.................................. Equation 1

Average velocity = Total displacement/ total time

Total dispalcement = √(30²+60²) = √4500 = 67.08 m

Total time = 1.5+2 = 3.5 s.

Substitute these value into equation 1

V = 67.08/3.5

V = 19.2 m/s.

Hence the average velocity is 19.2 m/s

The parameter given for the car during transit is 30 m north in 1.5 seconds and drives 60 east in 2 seconds, we want to find the average velocity.

average velocity is 19.2 m/s

Solution

The expression for Average velocity is

Average velocity = Total Displacement/ Total time Taken...............Eqn 1

Total Displacement = √(30²+60²) = √4500 = 67.08 m

Total time = 1.5+2 = 3.5 s.

From the Equation 1

Average Velocity = 67.08/3.5

V = 19.2 m/s.

Therefore, the average velocity is 19.2 m/s

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Usain Bolt's average speeds for each 10-meter section of his world record 100 m run in Berlin 2009 are as follows: 0.190 m/s, 0.186 m/s, 0.122 m/s, 0.122 m/s, and 0.120 m/s.

Usain Bolt's split times from his world record 100 m run in Berlin in 2009 is given below:Section / mTime / s50-601.890.990.90 60-700.860.83 70-800.820.83 80-900.820.83 90-1000.83To calculate Usain Bolt's average speed for each 10-meter section, we can use the formula :Average speed = distance/timeDistance for each section = 10mWe have the time for each section from the table above, thus we can find the average speed for each section:Section / mTime / sSpeed / m s-150-600.190 m s-160-700.186 m s-170-800.122 m s-180-900.122 m s-190-1000.120 m s-1In the table above, the average speed for each section of the 100 m distance is given in m s-1. Thus, Usain Bolt's average speed for the first 10m is 0.190 m s-1, for the second 10m, it is 0.186 m s-1, for the third 10m, it is 0.122 m s-1, for the fourth 10m, it is 0.122 m s-1, and for the last 10m, it is 0.120 m s-1.

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Yes, the ice skater changes her angular momentum when she pulls in her outstretched arms while spinning on point. Angular momentum is the product of moment of inertia and angular velocity, and is conserved in the absence of external torques.

When the ice skater pulls in her arms, she decreases her moment of inertia, which means that her angular velocity must increase in order to maintain conservation of angular momentum. This is because angular momentum is conserved when there is no net external torque acting on the system.

This phenomenon is known as the conservation of angular momentum, which states that the total angular momentum of a system remains constant in the absence of external torques. Therefore, as the ice skater pulls in her arms, she decreases her moment of inertia, which causes her angular velocity to increase in order to conserve her angular momentum. This makes her spin faster.

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Complete Question

When an ice skater pulls in her initially outstretched arms while spinning on point, does she change her angular momentum? If so, does it increase or decrease?

The rate at which the Sun emits energy is calculated using P = σ * A * T⁴. The fraction of emitted energy intercepted by Earth is (π * R_earth²) / (4 * π * R_earth-sun²). The solar constant is P * Fraction.

Step 1: Use the Stefan-Boltzmann Law
The Stefan-Boltzmann Law states that the power (energy emitted per unit time) of a blackbody is given by:
P = σ * A * T⁴
where P is the power, σ is the Stefan-Boltzmann constant (5.67 x 10⁻⁸ W/m²K⁴), A is the surface area, and T is the effective surface temperature.

Step 2: Calculate the surface area of the Sun
The surface area of a sphere is given by:
A = 4 * π * R²
where R is the radius. Since the diameter is given, we can find the radius as half of the diameter:
R = diameter / 2

Step 3: Calculate the power emitted by the Sun
Using the surface area and temperature, calculate the power:
P = σ * A * T⁴

Step 4: Calculate the fraction of emitted energy intercepted by Earth
The fraction of emitted energy intercepted by Earth can be found by calculating the ratio of the cross-sectional area of Earth to the surface area of a sphere with a radius equal to the Earth-Sun distance.
Fraction = (π * R_earth²) / (4 * π * R_earth-sun²)

Step 5: Estimate the solar constant
The solar constant is the amount of solar energy received per unit area at the mean Earth-Sun distance. It can be calculated using the power emitted by the Sun and the fraction of emitted energy intercepted by Earth:
Solar constant = P * Fraction

By following these steps, you can estimate the rate at which the Sun emits energy, the fraction of emitted energy intercepted by Earth, and the solar constant, given the diameter and effective surface temperature of the Sun and the mean Earth-Sun distance.

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Answer:

A

Explanation:

Put A, It will help you.

According to Newton's third law of motion, the ball imparts an equal and opposite force on the bat. i.e 290 N

Given that,

The mass of the ball = .145 kg

initial velocity of 35 m/s

collision lasts 0.005 seconds

final velocity of the ball is 25 m/s

We have momentum = mass x velocity.

a) Initial momentum = 0.145*35 = 5.075 kg-m/s

b) Final momentum = 0.145*25 = 3.625 kg-m/s

c) Change in momentum = 5.075 - 3.625 = 1.45 kg-m/s

Impulse = Force x time = change in momentum

F = change in momentum/time = 1.45/0.005 = 290 N

d) By Newton's third law of motion, the ball imparts an

     equal and opposite force on the bat.

    therefore, Force = 290 N.

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Answer: it is the asymptote

Explanation: a line that continually approaches a given curve but does not meet it at any finite distance.

Answer:

A force acting on an object causes the object to change its shape or size

Explanation:

The star having wavelength 1872nm is moving toward the earth.

It happens due to the phenomena of Doppler shift. Doppler effect, commonly known as Doppler shift and it is defined as The change is the wavelength or frequency of  waves as a result of an observer's motion In relation to the web source.

In visible light it is possible to see the apparent wavelength emitted by stars and galaxies. As a result, a start moving towards the earth appears to emit light with a the short wavelength.

Then the light shows that is static. It is known as blue shift because here spectrum is shifted towards the blue end due to the shortest wavelength.

And when a start goes away from us, it appears that it shifts It's light towards longer wavelength.

This end is referred as redshift because it is closer to the red end of the spectrum.

Add the spectrum of a particular star. Shown that the line appearing at the shortest wavelength is 1872nm in comparison to the laboratory measurement. This shows the same hydrogen line at a greater wavelength 1875.nm results that star is moving towards the Earth.

The star having wavelength 1872nm is moving toward the earth.

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The ratio of the mass of an electron to its rest mass when it is moving with a kinetic energy of 20 MeV can be calculated using the equation of special relativity and assuming that the speed of the electron is much less than the speed of light. The result is that the mass of the electron is 39.22 times its rest mass.

The ratio of the mass of an electron to its rest mass can be calculated from its kinetic energy using the equation of special relativity, which states that the total energy of an object is equal to its rest mass multiplied by the square of the speed of light, plus its kinetic energy.

The rest mass of an electron is 0.51 MeV, so its total energy is given by:

\(E\) = \(0.51 MeV*c^{2} + KE\)

Where c is the speed of light, and KE is its kinetic energy.

Since the kinetic energy of the electron is 20 MeV, we have:

\(E = (0.51 MeV) * (c²) + 20 MeV\)

And the total energy can be divided by the rest mass of the electron and the square of the speed of light to obtain the ratio of its mass to its rest mass:

 \(m/m0\) = \(\frac{E}{0.51 MeV * c^{2} }\)

\(m/m0\) = \(\frac{0.51 MeV*c^{2} + 20 MeV}{0.51 MeV }\)

We can simplify the calculation by assuming that the speed of the electron is much less than the speed of light, so that we can ignore the term (0.51 MeV * c^2).

In that case, we have:

\(m/m0\) = \(\frac{20MeV}{0.51MeV}\)

\(m/m0 = 39.22\)

So the ratio of the mass of an electron to its rest mass when it is moving with a kinetic energy of 20 MeV is 39.22.

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