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3 years ago

What does the law of conservation of energy state about energy in a closed system?

Physics

2 answers:

dolphi86 [110]3 years ago

3 0

The total amount of energy in a closed system must stay constant.

Ostrovityanka [42]3 years ago

3 0

Answer:

The system's energy can not be created, or destroyed. It's transformable from one shape to another. The energy stays conserved in a closed system. It is isolated in the surrounding area.

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X rays of wavelength 0.0100 nm are directed in the positive direction of an x axis onto a target containing loosely bound electr

Fofino [41]

Answer:

a) $=4.84*10^{-12}$

b) $= -2.76*10^{-14} J$

c) $i.e -2.76*10^{-14} J$

d)= 0 and the direction of motion is equal to zero

Explanation:

a) compton shift

$\Delta\lambda = \frac{h}{mc} (1-cos\theta)$

$\Delta\lambda = \frac{6.626*10^{-34}}{9.11*10^{-11}3*10^8} (1-cos180)$

$=4.84*10^{-12}$

b) the new wavelength

$\lambda' = 10.0*10^{-12} +4.84^10^{-12}$

$=14.84*10^{-12} m$

$\Delta E = E' - E$

$=hc[\frac{1}{\lambda'}-\frac{1}{\lambda}]$

$\Delta E = 6.626*10^{-34}*(3*10^8)[\frac{1}{14.84*10^{-12}}-\frac{1}{4.8*10^{-12}}]$

$= -2.76*10^{-14} J$

C)By conservation of energy, the kinetic energy of recoiling electron is equal to the magnitude of energy between the photon energy

$i.e -2.76*10^{-14} J$

d) the angle between the positive direction of motion

$sin\phy = \frac{\lambda_t sin\theta}{\lambda'}$

$=\frac{2.43*10^{-12}sin180}{14.84*10^{-12}}$

= 0

the direction of motion is equal to zero.

4 0

4 years ago

1. Which area should one seek if caught outside in a thunderstorm?

Oliga [24]

Answer:

1. sturdy shelter

2. i am preaty shure all of them

Explanation:

4 0

4 years ago

Read 2 more answers

An empty capacitor is capable of storing 1.0 × 10-4 J of energy when connected to a certain battery. If the distance between the

dangina [55]

Answer:

Explanation:

Energy stored in a capacitor

= 1/2 C₁V²

capacity of a capacitor

c = εK A / d

k is dielectric and d is distance between plates .

When the distance between the plates is halved and then filled with a dielectric (κ = 4.3)

capacity becomes 4.3 x 2 times

New capacity

C₂ = 8.6 C₁

Energy of modified capacitor

1/2 C₂ V²= 1/2 x 8.6 c x V²

Energy becomes

8.6 times.

Energy stored = 8.6 x 10⁻⁴ J

3 0

4 years ago

A magnet attracts more iron dusts at its end

GuDViN [60]

Answer:

Its a MAGNETIC FIELD that can let a magnet attracts more iron dusts

6 0

3 years ago

An object accelerates from rest to 93 m/s over a distance of 49 m. What acceleration did it experience?

Maksim231197 [3]

Answer:

$88.3ms {}^{ - 2}$

or 88.3m/s^2

Explanation:

Using suvat where we list everything that we are given

s=49m

u=0m/s

v=93m/s

a=?

t=we are not given this value, so we don't use

using a formula that doesn't involve time:

$v {}^{2} = u {}^{2} + 2as$

rearranging to find acceleration by subtracting u^2 on both sides

$v {}^{2} - u {}^{2} = 2as$

then dividing 2s on both sides

$\frac{v {}^{2} - u {}^{2} }{2s} = a$

$\frac{(93) {}^{2} - (0) {}^{2} }{2 \times(49) } = 88.3ms {}^{ - 2}$

so the acceleration is 88.3ms^-2 (1dp)

3 0

3 years ago