what is the kinetic energy of an object that has mass of 30 kilograms and move with a velocity of 20 m/s

Answers

Answer 1

Answer: Kinetic Energy = 1/2 * m * v² 1/2 * 30 * 20² 1/2 * 30 * 400 12000/2 6000 J.

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What does the term “basic unit of matter” refer to?Select one of the options below as your answer:a. Atoms
b. Elements
c. Molecules

Answers

Atom is themost basic unit of matter. They are the general term used to describe pieces ofmatter. But a different kind of atom makes up an element. A combination of atom of different elements createsa molecule. For example, you have water; it has a chemical formula of H2O. If youseparate H from O, you have two atoms. Two atoms for hydrogen and one atom foroxygen. However, they are of different elements. And when you combine them toform H2O, you create a molecule. The answer is A.

The table lists pressure and volume values for a particular gas. Which is the best estimate for the value of V at P = 7.0 × 103 pascals? P (pascals) V (liters) 5.0 × 103 6.0 1.5 × 104 3.0 2.0 × 104 2.0 2.5 × 104 1.5

Answers

Answer:

17.23L

Explanation:

The table lists pressure and volume values for a particular gas. Which is the best estimate for the value of V at P = 7.0 × 103 pascals?

P (pascals) V (liters) 1/v

1. 5.0 × 10^3 6.0 0.16

2. 1.5 × 10^4 3.0 0.33

3. 2.0 × 10^4 2.0 0.5

4. 2.5 × 10^4 1.5 0.66

if we are to plot the above data in a linear graph, the equation of a line graph below can be used

y-y1=m(x-x1)

y-y1= $(y2-y1)/(x2-x1)$ (x-x1)..............1

from the ideal gas law

pressure is inversely proportional to volume as nRT is the constant of proportionality

PV=nRT

P=nRT/V

from equation 1

let y1= 1.5 × 10^4

y2= 2.0 × 10^4

x1=0.33

x2= 0.5

y-1.5x10^4=2.0 × 10^4-1.5 × 10^4 /(0.5-.33)(x-0.33)

y-1.5x10^4=29411(x-0.33)

y=15000-9705.88+29411x

y=5294+29411x

at 7*10^3

7*10^3=5294+29411x

x=0.058

recall that x=1/V

inverse of both sides gives volume to be

V=17.23L

I think the question need to use extrapolation. FInd the linear function of the first and second data. And then, the anwser is 5.4 liters.

A) A block of mass, m, is pushed up against a spring, compressing it a distance x, and is then released. The spring projects the block along a frictionless horizontal surface, giving the block a speed v. The same spring projects a second block of mass 4m, giving it a speed 3v. What distance was the spring compressed in the second case?B) Initially a body moves in one direction and has kinetic energy K. Then it moves in the opposite direction with three times its initial speed. What is the kinetic energy now?

Answers

KE=1/2mv^2

F= -kx

KE= -kx

-kx= 1/2mv^2

when u quadruple the m, the x also quadruples. when the speed is multiplied by 3, since it is v^2, the x is multiplied by 3^2 , which is 9

so distance the spring compressed is x×4×9= 36x

b) using the KE formular too,

when the v is tripled, since formula is v^2, the resulting KE will be multiplied by 3^2, so KE now= 9K

If people from Georgia have just experienced an extremely cold winter the last couple of months, what would the climate most likely be classified as? Polar
Temperate
Maritime
Tropical

Answers

temperate I'm not sure, cuz polar is like freeze, and tropical is hot

Answer:

polar

Explanation:

they said it was extreme so atleast it would be polar

Which climate might one expect for Europe?a. temperate
b. polar
c. arctic
d. tropical

Answers

temperate.

polar and arctic are the same thing, so they're eliminated.

you're left with beach weather or normal weather. Europe is not a big beach, so I'd go with normal, temperate.

A wave with a wavelength of 15 m travels at 330 m/s. Calculate its frequency.

Answers

Given the value of wavelength and speed at which the wave travels, the frequecy of the wave is 20 Hertz.

What is Wavelength?

Wavelength is simply the distance over which the shapes of waves are repeated. It is the spatial period of a periodic wave.

From the wavelength, frequency and speed relation;

λ = v ÷ f

Where λ is wavelength, v is velocity/speed and f is frequency.

Given the data in the question;

Wavelength λ = 15m
Speed of the wave v = 300m/s
Frequency f = ?

To determine the frequency of the wave, we substitute our given values into the expression above.

λ = v ÷ f

f = v ÷ λ

f = 300m/s ÷ 15m

f = 20s⁻¹

f = 20Hz

Given the value of wavelength and speed at which the wave travels, the frequecy of the wave is 20 Hertz.

Learn more about Speed, Frequency and Wavelength here: brainly.com/question/27120701

${ \boxed {\red {\boxed {\green {\boxed {\blue {\boxed{ \bold{frequency = (velocity(v))/(wavelength(λ)) }}}}}}}}}$

$\mathsf{frequency = \frac{330ms {}^( - 1) }{15m} }$

$\purple{ \sf{frequency \: = \: 22m {}^( - 2) } {s}^( - 1) }$

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