Ask question

Ask question

All categories

vladimir1956 [14]

3 years ago

13

The observation that energy transformations are rarely 100% efficient is seen by scientists as a violation of the Law of Conserv

ation of Energy.
true or false ???

2 answers:

iVinArrow [24]3 years ago

7 0

Answer:

true I believe

Explanation:

dimulka [17.4K]3 years ago

6 0

Answer:

l

Explanation:

You might be interested in

Plss s ss s s s s s s s s

Crazy boy [7]

Answer:

i font know ewan madaling sabihin yan

8 0

2 years ago

Read 2 more answers

when an object is moving there is always a force pulling it in the direction of its motion?true or false? explain

pickupchik [31]

This is false because an object can also be pushed by force and isn't always have to be pulled by a force.

8 0

3 years ago

A photon of wavelength 192 nm strikes an aluminum surface along a line perpendicular to the surface and releases a photoelectron

alex41 [277]

Answer:

$KE=3.529\times10^{−27}\ J$

Explanation:

Given that

Wavelength λ=192 nm

So energy of photon,E

$E=\dfrac{hC}{\lambda }$

Now by putting the values

$h=6.6\times 10^{-34}\ m^2.kg/s$

$C=3\times 10^{8}\ m/s$

$E=\dfrac{6.6\times 10^{-34}\times 3\times 10^{8}}{192\times 10^{-9} }$

$E=1.03\times 10^{-18} J$

We know that

Kinetic energy given as

$KE=\dfrac{P^2}{2m}$

$KE=\dfrac{E^2}{2mC^2}$

$KE=\dfrac{(1.03\times 10^{-18})^2}{2\times 1.67\times 10^{-27}(3\times 10^8)^2}$

$KE=3.529\times10^{−27}\ J$

5 0

3 years ago

What best describes a reference fram?

finlep [7]

Answer:

A reference frame is that frame to which the qualities of an object are related:

For instance - an object may described by - mass, speed, acceleration, size, etc,

It is important to remember that Newton's Laws of motion do not hold in accelerated reference frames -

Einstein's laws of special relativity are only true in frames that move with contant speed to one another

7 0

2 years ago

The Law of the Conservation of Mass states that the mass of the products in a chemical reaction must equal the mass of the react

Stella [2.4K]

True (idk exactly why though)

6 0

3 years ago