if you leave a fan on in a room even if its not pointed towards the person, does the room still get cooler?

Answer:

It eliminates the reaction force of the object.

Explanation:

It eliminates the reaction force of the object by dissipating the energy on the compression of the padding material and distributing the force of impact over the large surface area. As less area would generate more stress by the force.

We know by the equation:

[tex]\sigma=\frac{F}{A}[/tex]

where F & A are force and area respectively.

Also the compression of material absorbs energy in the form of elastic potential energy given by the equation:

[tex]KE=\frac{1}{2} k.\Delta x^2[/tex]

where:

k= elastic constant

[tex]\Delta x[/tex]= change in the dimension of the elastic materiel

Answer:

it´s C

Explanation:

Answer:

p = mv

m = p/v = 125000/22 = 5682 kg

Explanation:

Direct application of the momentum equation

p = mv

where,

p: momentum

m: mass

v: object velocity

steps:

-------

1) check for units consistency (  SI or Imperial)

2) separate the variable you are looking for.

3) DONE! :DD

Answer:

the answer is C. 5680 kg

Explanation:

on larry foe nem

Answer:

3.09 cm /sec.

Explanation:

Speed = distance / time taken

= 186×220× 91.44 cm/sec

1×14×86400

= 3.09 cm /sec.

Note: 1 yard = 91.44 centimeters

And 1 day= 24×60×60= 86400 seconds.

The speed of the small turtle in centimeters per second is 3.1 cm/s.

The given parameters:

speed of the small turtle, v = 186 furlongs per fortnight

1 furlong = 220 yards

1 fortnight = 14 days

To find:

Find the equivalent yard in centimeter and equivalent seconds in a day:

Calculate the speed of the small turtle in centimeters per second:

[tex]v = 186 \ \frac{furlong}{fortnight} \times \frac{220 \ yards}{1 \ furlong} \times \frac{1 \ fortnight}{14 \ days} = 2922.857 \ \frac{yards}{day} \\\\In \ centimeter \ per \ second:\\\\v = 2922.857 \ \frac{yards}{day} \times \frac{91.44 \ cm}{1 \ yard} \times \frac{1 \ day}{86400 \ s} = 3.1 \ \frac{cm}{s}[/tex]

Thus, the speed of the small turtle in centimeters per second is 3.1 cm/s.

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Answer:

You didn't provide any answer choices so, I'll tell you the steps in the rock cycle.

1. weathering and erosion

2. transportation

3. deposition

4. compaction

5. cementation

Hope this helps!

Answer:

Use the right-hand rule for magnetic force to determine the charge on the moving particle.

This is a  

negative

charge

Explanation:

Answer:

The answer is negative

Explanation:

Answer:

Pendulum:

A pendulum consists of a mass (known as a bob) attached by a string to a pivot point. As the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

Energy Transformations:

From Max to Mean Position:

When the bob of the pendulum is held high at one maximum. All the energy of the pendulum is in the form of Potential Energy. The speed of the bob is zero. When released, the bob starts moving downward and as it moves, it gains speed. Here, the Potential Energy of the system is being converted into Kinetic Energy. At the mean position, when the bob is at the minimum height, the potential energy of the system is zero and Kinetic Energy is maximum as the bob is at its maximum speed.

From Mean to Max Position:

Due to Inertia, the bob at the speed v continues its motion and moves towards the other extreme position. And as it do so, the speed decreases and becomes zero at the extreme position. The Kinetic energy converts into Potential Energy,

The motion thus continues.

A graph has been attached for better understanding of the Energy Transformations.

Answer:

Sooo . . . whats the answer

Explanation:

Answer: 0.147

Explanation:

just took it

Answer:

0.147

Explanation:

Because i just did it and got it right :))) your welcome

Answer:

Both objects are packed equally tightly.

Explanation:

For Substance R we have

mass = 10 g

Volume = 22 cubic cm

So we know that density is defined as

[tex]\rho = \frac{m}{V}[/tex]

here we have

[tex]\rho = \frac{10 g}{22 cm^3}[/tex]

[tex]\rho = 0.454 g/cm^3[/tex]

For substance S we have

mass = 25 g

Volume = 55 cubic cm

So we know that density is defined as

[tex]\rho = \frac{m}{V}[/tex]

here we have

[tex]\rho = \frac{25 g}{55 cm^3}[/tex]

[tex]\rho = 0.454 g/cm^3[/tex]

So here both have same density

so  correct answer would be

Both objects are packed equally tightly.

Answer:

c

Explanation:

The answer is B. cyan.

If an object reflects green and blue light we preceive the reflection not as separate colours but a mixture of both aka cyan.

Hope this helps.

r3t40

The color appears as cyan when an object reflects green and blue light.

Answer: A

Explanation

The light that is visible to the eye is a form of electromagnetic energy.

White light consists of the electromagnetic spectrum combined by lights of various wavelengths.

Each individual light in this white light has distinct frequency and wavelength.

The clouts observed is due to the reflection of light consisting of three colors- red, blue and green known as primary additive colors of light.

When blue and green combine, primary subtractive color forms, cyan.

Answer:

centripetal force

Explanation:

When a person spins a bucket of water in a circle, the force acting on the bucket to keep the water inside is called centripetal force.

The centripetal force is a constant resultant force that acts on an object in circular motion.

Answer:

centripetal force

Explanation:

In the DC circuit, the charge move in only one direction, Option D is correct.

Electric Current flows in only one direction in a Direct Current circuit. Many low-voltage applications use DC, particularly those that are battery-powered. A DC power supply is necessary for most electronic circuits.

In the DC circuit, the charge move in only one direction,

Hence, option D is correct.

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Answer:

1: work

2: energy

3: joule

1) The ability to cause change in matter

Energy

2) The product of force and the distance through which it moves

Work

3) metric unit of work and energy equals to one newton times one matter

joule

Answer:

The correct answer is C: Disposal of radioactive waste.

Explanation:

During nuclear fission reactions, many intermediate radioisotopes are produced. For example, uranium releases different mass distribution isotopes and these isotopes emit radiations.

Most harmful isotopes for the environment are strontium and cesium because these have half-lives and an inclination of mixing in food chains.

When radioactive wastes are removed from nuclear reactors they flow towards the swimming pool and also have the tendency to isolate the short-lived isotopes from the environment.

Therefore, radioactive waste disposal has always remained a major problem

Answer:

The third one is the correct answer:)

Explanation:

Answer:

A standard for comparison that helps to ensure that the experimental result is caused by the condition being tested is the 'control'.

Explanation:

Control is the standard used for the comparison which helps to make sure that the results of a certain experiment are caused by the condition which is being tested.

In controlled experiments, only one variable is changed at a time while the other variable (controlled variable) is kept same in order to isolate the results.

Answer:

9.2 N, with significant figure rounding (2 s.f.)

Explanation:

This problem can be solved using momentum. The following equation relates momentum (mass & velocity) with force and time:

Note that  where v is the final velocity and v₀ is the initial velocity. Δv just means change in velocity.

Mass of the egg is 150 g, but we need to convert to kilograms if we want to use Newtons as a unit. 150 g is equal to 0.15 kg. since 1000 g = 1kg. 

m = 0.15 kg

The dropped from 3.0 meters is irrelevant as the question tells us the initial velocity of the egg: 4.4 m/s before it hits the ground.

v₀ = 4.4 m/s [down]

When it comes to a stop, the egg will have a velocity of 0.

v = 0 m/s

The time it takes for the egg to stop is 0.072 seconds.

Δt = 0.072 s

Therefore, if down is positive, then

We round to two significant figures since every quantity has two sig. figs.

We only care about the magnitude, not direction. The answer is 9.2 N.

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5.0

The magnitude of force that the ground exerted on the egg is 9.2N

The change in momentum is equal to the product of impact force applied while colliding and time for that impact.

F. t = m (Vf -Vi)

where, Vf is the final velocity and Vi is the initial velocity.

Given, mass of the egg is 150 g, m = 0.15 kg

The egg is dropped from 3.0 meters and the initial velocity v₀ = 4.4 m/s [down]

When egg strikes the ground, the egg will move with v = 0 m/s

The time taken for the egg to stop is Δt = 0.072 s

Substitute the values into the expression, we get

F x 0.072 = 0.15 x (0 - 4.4)

F = 9.16N

Thus the magnitude of force is 9.2 N.

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Answer:

Can occur where there is little or no matter.

Explanation:

Radiation is mode of heat transfer that does not necessarily have to involve a medium. Radiation occurs fastest in a vacuum where it has a speed of c- the speed of light where heat energy is transferred in photons. The factors that affect  radiation include the distance between the producer of the heat and the  receiver and the temperature of the producing body.

Answer:

Can occur with little or no matter

Explanation:

[tex]

R_1=20\Omega \\

R_2=30\Omega \\

R_3=30\Omega \\

U=2V \\ \\

R_{12}=\dfrac{1}{R_1}+\dfrac{1}{R_2}=\dfrac{R_1R_2}{R_1+R_2}=15\Omega \\

R_{123}=\dfrac{R_{12}R_3}{R_{12}+R_3}=10\Omega \\

I=\dfrac{U}{R_{123}}=\boxed{0.2A}

[/tex]

Hope this helps.

r3t40

Answer:

A) sunlight to strike at different angles

Explanation:

A tilt in the earth’s axis causes sunlight to strike at different angles.

Answer:

A) sunlight to strike at different angles

Explanation:

Picture the sun's rays hitting Earth.

Here is proof that my answer is correct:

From mechanical energy.

Answer:mechanical energy.

Answer:

pretty sure its motor 2, with body 1

Explanation:

To build a car with the greatest acceleration, choose motor 2 and body 1.

To find the car with the greatest acceleration, Devon should consider both the motor force and the body mass.

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

In this case, if Devon wants the greatest acceleration, he should choose motor 2 with body 1. Motor 2 provides the most force, and body 1 has the smallest mass.

This combination will result in the greatest net force and therefore the greatest acceleration.

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Answer:

y=5x

Explanation:

it would be y=5x because in slope intercept form, y=mx+b, the "m" equals the slope, so when it says that the slope is 5, you plug it in there. And then the b is the y intercept, so because it is 0, you don't put anything down

Answer:

d = 10.076 m

Explanation:

We need to obtain the velocity of the ball in the y direction

Vy  = 24.5m/s * sin(35) = 14.053 m/s

To obtain the distance, we use the formula

vf^2 = v0^2 -2*g*d

but vf = 0

d = -vo^2/2g

d = (14.053)^2/2*(9.8) = 10.076 m

Answer:

10.076

Explanation:

Answer:

I believe the answer is D- "all matter is made up of atomic particles which are in constant random motion."

Explanation:

Hopes this helps:)

Answer:

all matter is made up of atomic particles which are in constant random motion

Explanation:

Answer:

195 countries

Explanation:

There are only 195 countries within the whole world.

Answer:

In Physics, the desire of an object to keep doing what it is doing is termed as Inertia.

Explanation:

Inertia is the quality of an object due to which it does nothing or remains unchanged.

According to Newton's first law of motion "An object at rest remains at rest or keeps moving in a straight line with uniform speed unless an external force is acted upon it."

This law is also known as the Law of Inertia.

In the eighteenth century Isaac Newton found out that when a beam of light from the Sun, passes trhough a prism is decomposed in many different colors. He named this phenomenom as dispersion of light.

This phenomenom occurs when a beam of white light (which is compound of many wavelengths or "colors") is refracted (the different rays of light are diverted depending on their wavelengths) in some medium, leaving their constituent colors separated.  

Therefore:

Answer:

(c) 400j

Explanation:

The amount of energy dedicated to kinetic energy will be 400 J.Option C is correct.

The energy possessed by the body by the virtue of motion is known as kinetic energy. It is found as the product of mass and the square of the velocity.

Part of the energy in each machine that exists dissipates to the medium in the form of heat, friction with the surface, and other forms of energy dissipation.

If the entire kinetic energy loses 200 J in the form of heat and 200 J in the form of friction this quantity of energy has been wasted and cannot be utilized as kinetic energy.

The energy goes toward kinetic energy will be ;

Kinetic energy = Electric energy -Heat-friction

Kinetic energy = 800-200-200

Kinetic energy =400 J

Hence, the amount of energy dedicated to kinetic energy will be 400 J.Option C is correct.

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Answer:

8,790.9

Explanation:

first we start with parentheses so we take (102,900/12) and (170x1.27) and simplify these 102,900/12 would equal 8575, and 170.1.27 would equal 215.9. next we add these together, so (8575)+(215.9), and that would equal our answer which is 8,790.9

To calculate (102,900/12)+(170x1.27) correctly to significant figures, we find that the sum is 119.9 when rounded to the tenths place. It's essential to respect the rules for significant figures, where the precision of the least precise measurement used in the calculation dictates the precision of the final answer.

The solution to the problem (102,900/12)+(170x1.27) needs to be expressed to the correct number of significant figures. When performing calculations with measured values, it's important to consider the precision of the numbers involved. In addition, different operations have different rules for significant figures.

After calculating each component, we then add the two results. The sum must be reported to the lowest place value of the least precise measurement (in this case, the tenths place). This means that the correct final answer, expressed with the appropriate number of significant figures, is 119.9 (assuming the first calculation to be an exact number).

When dealing with the addition of 89.332 and 1.1, since the second number has fewer significant figures after the decimal place, the result should be reported to match that precision. The answer, when rounded to the correct number of significant figures, is 90.4.

Overall, understanding the rules for significant figures is crucial in accurately reporting measurements and results in scientific and mathematical contexts.

Answer:

The act of using senses or tools to gather information is called Observation.

Answer: It is called an observation

Explanation: When we have a phenomenal and we want to gather information about it, we need to "observe" it.

This may be done by using our senses, like looking, smelling, touching, or a more modern approach, using tools, like spectrometers, velocimeter, or the needed tool.

A given feature of a phenomenon that can be measured is called an "observable", and the act of measuring this "observable" is called an "observation"