2. A volleyball player strikes a 3 kg volleyball with a velocity of 14 m/s. What is the kinetic energy of the volleyball?



3. A cat jumps off a table with 750 J of kinetic energy at 10 m/s. Find the cat's mass.​

If the lens of our eyes were concave, we would not be able to see. We would be blind. This is because our eyes form a visual image on the same side of the lens at the object being viewed. Thus, a concave lens would result in the visual image focusing in front of the eye, not the retina inside the eye. This would mean that no signals would be sent to the brain, and vision would not be possible.

quite a lot :0

I hope this helps, and keep some kryptonite on hand dude!

Answer:

They can't hear an echo in small room because in it the sound can't be reflected back. For an echo of a sound to be heard,the minimum distance between the source of sound and the walls of the room should be 17.2 m.

hopw it helps

answer: the third one

Answer:

gtsidtuye5udme5ir66eisthfetewjey

Explanation:

•diamond is a great place to start and I am not sure if I can you to dear friend of the day I am not a member of thejtearhaarymrue but I think you should have all of your ideas to be a good choice if you welcome mam and happiness of the people you are not j or your own children like sw or your own children or the family and happiness of the past year and happiness and love chocolate and I love chocolate too but you are a great person to be with example of the same

Answer:

what's languae it's that?

Answer: The crest of one wave overlaps with the trough of another

Explanation:

I took the test and got 100%. This is the correct answer

The best description of the destructive interference of light is the crest of one wave overlaps with the trough of another.

Destructive interference takes place when waves come together in such a manner that they completely cancel each other out or amplitude of the resulting wave decreased.

The highest surface part of a wave is called the crest, and the lowest part is the trough.

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Answer: Its B. There will be 0.031 kg left after 151 years,

Explanation: Im doing my assessment right now.

The half-life of Cs-137 is 30.2 years. If the initial mass of the sample is 1.00 kg, the mass remain after 151 years is 0.031 Kg.

Caesium-137, or radiocaesium, is a radioactive isotope of caesium that is formed as one of the more common fission products by the nuclear fission of uranium-235 and other fissionable isotopes.

Cs-137 is used in medical radiation therapy devices for treating cancer.

The half-life is the amount of time it takes for a given sample to lose half of the original amount or the time for radioactive substance to decay. The half-life of Cs-137 is 30.2 years.

Decay constant of radioactive substance is its probability of decay per unit time.

In this case,

Mass of sample is 1 Kg

Half-life of Cs-137 is 30.2 years

The elapsed time is 30.2 years.

This means, one half-life is elapsed, the half of sample will decay in 30.2 years. Therefore, the half of the original substance will remain in 30.2 years which is 0.500 Kg. After another 30.2 years, it will be 0.250 Kg. And after 151 years, it will be 0.031 Kg.

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Answer:

Explanation: N2 Nitrogen, O2 Oxygen, Ar does not form molecules

The required list the molecules of elements in the sample of air, Argon (Ar), Carbon dioxide (CO2), Neon (Ne),Helium (He), Methane (CH4), Hydrogen (H2), and Ozone (O3).

Molecules are the smallest fundamental units of a chemical compound that retain the chemical properties of that compound. They are composed of two or more atoms that are bonded together through chemical bonds.

Here,
Air is a mixture of gases, with the two most abundant elements being nitrogen (N2) and oxygen (O2), together making up about 99% of dry air.

Here are the chemical formulas of some of the other important gases in air,

Carbon dioxide (CO2)

Argon (Ar)

Neon (Ne)

Helium (He)

Methane (CH4)

Hydrogen (H2)

Ozone (O3)

Note that the concentrations of these gases can vary depending on location and other factors. Additionally, air can also contain trace amounts of other gases, particles, and pollutants.

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Answer:

The second law of thermodynamics states that the total entropy of a system either increases or remains constant in any spontaneous process; it never decreases. ... This is because entropy increases for heat transfer of energy from hot to cold (Figure 12.9).

Explanation:

Hope It Helps

Answer:

Standing in a moving bus may lead the person fall when the driver will apply brake.

Explanation:

According to Newton's third law of motion, there is an equal and opposite reaction to every action. When the bus is moving, the person standing is in the state of rest. The moment the driver applies brake, the bus stops. The stopping of the bus makes the person in the stationary position change in motion. Because of this force, the person may fall and collide if he is standing instead of sitting in the moving bus.

Answer:.....................

solar panels

Answer:

16.2m/s

Explanation:

Kinetic energy=1/2mass*speed squared

KE=1/2mv^2

Data,

KE=85J

M=0.65kg

V=?

85J=1/2(0.65kg)V^2

Cross multiply

2 *85=0.65V^2

Divide both sides by 0.65

170/0.65=v^2

V=✓(170/0.65)

V= 16.172m/s

First option is collect

The horizontal component of velocity is

(22 m/s) • cosine(62°).

The vertical component of velocity is

(22 m/s) • sine(62°).

These are the original components, right after the kick. As time goes on, the horizontal one doesn't change. But the vertical one gets bigger and bigger, because gravity is accelerating the ball downward.

That's the complete story of projectile motion.

Explanation:

1. f = r/2 = 34.0/2 = 17.0 cm

2. 1/s'= -1/f - 1/s

= -1/17 - 1/50

= (-50-17) /850

= (-67) /850

s' = 850/(-67) = - 12.69 cm

3. M = |s'/s| = |-12.69/50| = 0.25

h' = 0.25×20 = 4 cm

Answer:

Current, I = 4.75 Amps

Explanation:

Given the following data;

Voltage = 19 V

Resistance = 4 Ohms

To find the current;

Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.

Mathematically, Ohm's law is given by the formula;

[tex] V = IR[/tex]

Where;

V represents voltage measured in voltage.

I represents current measured in amperes.

R represents resistance measured in ohms.

Making current (I) the subject of formula, we have;

[tex] I = \frac {V}{R} [/tex]

Substituting into the formula, we have;

[tex] I = \frac {19}{4} [/tex]

Current, I = 4.75 Amps

The time taken is 10 years.

The term simple interest is an interest that is charged only on the principal and not on the interest.

We have the following;

Principal =  500 birr

amount = 900 birr

rate = 8%

Interest = 900 birr - 500 birr = 400 birr

400 = 500 × 8 × T/100

400 × 100 = 500 × 8 × T

T = 400 × 100/500 × 8

T = 10 years

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Answer:

10 years

Explanation:

To solve this first we have to find the simple interest.

Let us find it now.

Interest = birr 900 - birr 500

             = birr 400

Now we are having,

Amount = birr 900

Principal = birr 500

Interest = birr 400

rate = 8%

Period of time = ?

Let us use the formula to find the period of time.

Simple interest = Principal × Rate × Time ÷ 100

birr 400  = birr 500 × 8 × t ÷ 100

birr 400 × 100 = 4000t

40000 = 4000t

Divide both sides by 4000.

10 = t

Therefore, the time is 10 years.

Let me know if you have any other questions. :-)

Answer:  B

Explanation:

Answer: increase the voltage

Explanation:

Answer:

increase the voltage

Explanation:

Answer:

distance and time of the motion

Answer:

4cm

Explanation:

If it's a simple ratio 2cm:10N to ?cm:20N, It should be 4cm:20N.

Answer:

Las células del interior son negativas, mientras que en el exterior son positivas.

Explanation:

Que tenga un buen día :)

Answer:

1.62

Explanation:

comment section (credits to charlizebarth)+ correct on acellus

EMF induced in coil is directly proportional to the rate of change of magnetic flux by the flowing current with n number of turns in it.The total emf generated is 1.62 volts

Given-

Total coils in a solenoid [tex]N[/tex] is 365 coils.

The change in flux is,

[tex]d\phi=9.44\times10^{-5} -2.57\times 10^{-5}[/tex]

[tex]d\phi=6.87\times10^{-5}[/tex]

The change in time [tex]dt[/tex] is 0.0154 sec.

According to Faraday's law the EMF induced in coil is directly proportional to the rate of change of magnetic flux produced in the coil by the current i flowing in it with conductor having a finite number of turns in it.This can be given as,

[tex]emf=-N\dfrac{d\phi }{dt}[/tex]

[tex]emf=-364\times \dfrac{6.87\times 10^{-5}}{0.0154}[/tex]

[tex]emf= -1.62[/tex]

Hence, the total emf generated is 1.62 volts.

For more about the EMF, follow the link below-

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Answer:

when you kick a football it stops after sometime this is because of fiction force

Explanation:

Answer:

Volume displaced by ducky = 75 mL = 7.5 x 10⁻⁵ m³

Mass displaced by the ducky = 7.5 x 10⁻² kg = 75 grams

Explanation:

The ducky will displace the volume of the water equal to its own volume.

Volume displaced by ducky = 75 mL = 7.5 x 10⁻⁵ m³

And the mass displaced by ducky will be equal to:

Mass displaced by the ducky = (Density of Water)(Volume displaced by ducky)

Mass displaced by the ducky = (1000 kg/m³)(7.5 x 10⁻⁵ m³)

Mass displaced by the ducky = 7.5 x 10⁻² kg = 75 grams

Answer:

the acceleration of gravity on Planet X is 19.89 m/s^2

Explanation:

The computation of the acceleration of gravity on Planet X is shown below:

T = 2π√l ÷ √g

g = l ÷ (T÷ 2π)^2

= 4π^2l ÷ T^2

= 4π^2× 0.2 ÷ 0.63^2

= 19.89 m/s^2

Hence, the acceleration of gravity on Planet X is 19.89 m/s^2

In this way it should be calculated

The same would be relevant and cosnidered

For this assignment, you will develop several models that show how light waves and mechanical waves are reflected, absorbed, or transmitted through various materials. For each model, you will write a brief description of the interaction between the wave and the material. You will also compose two typewritten paragraphs. The first will compare and contrast light waves interacting with different materials. The second will explain why materials with certain properties are well suited for particular functions.

A wave is any disturbance that carries energy from one place to another. There are two different types of waves: mechanical and electromagnetic. A mechanical wave carries energy through matter. Energy is transferred through vibrating particles of matter. Examples of mechanical waves include ocean waves, sound waves, and seismic waves. Like a mechanical wave, an electromagnetic wave can also carry energy through matter. However, unlike a mechanical wave, an electromagnetic wave does not need particles of matter to carry energy. Examples of electromagnetic waves include microwaves, visible light, X-rays, and radiation from the Sun.

Answer:

Here the other guy is right I’m answering so he can be marked brainliest

Explanation:

i searched this in googl.e, and there was one website, so i clicked it, and umm it was very disgusting ,,,

Answer:

Explanation:

First of all, I used the specific heat of water as 4182 J/(kgC) and the specific heat of ethyl alcohol (EtOH) as 2440 J/(kgC); that means that we need the masses in kg, not g.

120.g = .1200 kg of ethyl alcohol. Now for the formula:

[tex]t_f=\frac{(m_{H2O}*spheat_{H2O}*temp_{H2O})+(m_{EtOH}*spheat_{EtOH}*temp_{EtOH})}{(m_{H2O}*spheat_{H2O})+(m_{EtOH}*spheat_{EtOH})}[/tex] where spheat is specific heat.

Filling that horrifying-looking formula in with some values:

[tex]16.0=\frac{(x*4182*20.0)+(.1200*2440*10.0)}{(x*4182)+(.1200*2440)}[/tex] and

[tex]16.0=\frac{83640x+2928}{4182x+292.8}[/tex] and

16(4182x + 292.8) = 83640x + 2928 and

66912x + 4684.8 = 83640x + 2928 and

1756.8 = 16728x so

x = .105 kg and the amount of water added is 105 g

Answer:

D

Explanation:

Spy gear is different from Spyware.