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4 years ago

What is the difference between transformation of energy and transfer of energy

Physics

1 answer:

Svetllana [295]4 years ago

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In energy transfer, happens from one object to another without changing its form. For example, when you fill a pot of water and sit it on the stove, the water continues to heat until you turn it off. While in a energy transformation, the energy changes forms such as Chemical, kinetic.

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A traveling wave is described by the following function y=0.12 cos (4x +2t). Here y(x,t) is the displacement of the particle at

sveticcg [70]

Answer:

d. 0.5 m/s along -x direction

Explanation:

Wave: A wave is a disturbance, that travels through a medium and transfers energy from one point to another, without causing any permanent displacement of the medium itself.

The general equation of a traveling wave can be expressed as

y = Acos(2πft-2πx/λ).................................. Equation 1

Where A = amplitude of the wave, f = frequency of the wave, λ = wavelength of the wave, x = linear distance, t = time, π = pie.

From the question,

the equation of the moving wave is

y = 0.12cos(4x+2t) ................................... equation 2

Comparing equation 1 and 2

-2πx/λ = 4x

λ = -2π/4

λ = -2(3.14)/4

λ = -1.57 m.

Also,

2πft = 2t

f = 2t/2πft

f = 1/π

f = 1/3.14

f = 0.3185 Hz.

Recall that

v = λf.......................... Equation 3

Substitute the value of f and λ into equation 3

v = -1.57(0.3185)

v = - 0.5 m/s.

Note: v is negative because - x direction

Hence the right option is d. 0.5 m/s along -x direction

5 0

4 years ago

What force would be required to accelerate a 1,100 kg car to 0.5 m/s2?

Klio2033 [76]

Force =mass x acceleration =1100 x0.5 =550

4 0

3 years ago

A student wishes to record a 7.5-kilogram watermelon colliding with the ground. Calculate how far the watermelon must fall freel

algol [13]

Answer:

42.86m

Explanation:

The first thing we should keep in mind is that the watermelon moves with uniform acceleracion equal to gravity (9.81m / s ^ 2)

A body that moves with constant acceleration means that it moves in "a uniformly accelerated motion", which means that if the velocity is plotted with respect to time we will find a line and its slope will be the value of the acceleration, it determines how much it changes the speed with respect to time.

When performing a mathematical demonstration, it is found that the equations that define this movement are as follows.

$\frac {Vf^{2}-Vo^2}{2.g} =Y$

where

Vf=29m/s= final speed

Vo= initial speed=0m/S

g=gravity=9.81m/s^2

Y= distance traveled(m)

solving

$\frac {Vf^{2}-Vo^2}{2.g} =Y\\\frac {(29m/s)^{2}-(0m/s)^2}{2(9.8m/s^2)} =Y\\Y=42.86m\\$

the distance traveled by watermelon is 42.86m

5 0

4 years ago

A hydraulic press must be used to press-fit two components together in an assembly process. the system must generate at least 77

Kobotan [32]

The pressure generated by the piston at the input cylinder must be:

p = F / A = 250 lb-f / 30 in^2

The pressure generated by the piston at the output cylinders is p = F / A = 775 lb-f / A.

Pascal principle rules that both pressures are equal, so:

250 lb-f / 30 in^2 = 775 lb-f / A => A = 775 lb-f * 30 in^2 / 250 lb-f = 93 in^2

Gvien that each output cylinder are 30in^2 you need 93 / 30 = 3.1 cylinders.

Which means that at least you need 4 cylinders to generate a force at least of 775 lb-f.

Answer: 4

8 0

4 years ago

A 5.00-g bullet leaves the muzzle of a rifle with a speed of 320 m/s. the expanding gases behind it exert what force on the bull

muminat

Answer;

= 312 Newtons

Explanation;

The bullet has a mass of 0.005 kg, and a velocity of 320 m/s, so we need to find it's final kinetic energy.

KE = 1/2*m*v^2

= 1/2*0.005*320^2

= 256 Joules.

Divide this by the distance over which this energy was received and you have the force that provided that energy.

= 256/0.820 = 312.195 Newtons

Rounded off, this is 312 N

3 0

3 years ago

What is the difference between transformation of energy and transfer of energy​

What is the difference between transformation of energy and transfer of energy