You have a mass of 95 kg.<br> a. What is your weight on Earth?

Which of the following is not a dwarf planet?

il63 [147K]

Hydra would not be considered a dwarf planet. Hydra is a moon of Pluto.

7 0

3 years ago

A car engine has power than a horse because a car engine does the same amount of work in time. Yasmin and Raj each had 10 boxes

labwork [276]

Answer:

A car engine has more power than a horse because a car engine does the same amount of work in time. Yasmin and Raj each had 10 boxes of equal weight to stack next to each other on the same shelf, at the same height and in the same arrangement. Yasmin completed the task in 2 minutes, while Raj took 3 minutes to stack his boxes. Raj applied less power than Yasmin because his stacking took more time to do the same amount of work.

Explanation:

4 0

3 years ago

Read 2 more answers

Please help <br> I need it queekly

olga_2 [115]

Answer:

it is cheap to use as many fuels are expensive and do the same as destroying our environment

that's according to my consciousness

6 0

3 years ago

When light with a wavelength of 238 nm is incident on a certain metal surface, electrons are ejected with a maximum kinetic ener

erastova [34]

Answer:

The wavelength is 173 nm.

Explanation:

This kind of phenomenon is known as photoelectric effect, it occurs when photons of light inside the metal surface and if they have the right amount of energy electrons absorb it and got expelled from the metal as photo electrons. The maximum kinetic energy of that photo electrons is given by the expression:

$K_{max} =E_{photon} - \Phi$ (1)

With E the energy of the photon and Φ the work function of the material. The work function is a value characteristic of each material and is related with how much the electron is attached to the material, the energy of the photon is the Planck's constant (h= $6.63\times10^{-34}$ ) times the frequency of light ( $\nu$ ) , then (1) is:

$K_{max} =h\nu - \Phi$ (2)

The frequency of an electromagnetic wave is related with the wavelength ( $\lambda$ ) by:

$\nu=\frac{c}{\lambda}$ (3)

with c the velocity of light (c= $3.0\times10^{8}$ )

Using (3) on (2):

$K_{max} =\frac{hc}{\lambda} - \Phi$

Solving for $\Phi$ :

$\Phi=\frac{hc}{\lambda}-K_max=\frac{(6.63\times10^{-34})(3.0\times10^{8})}{238\times10^{-9}}-3.13\times10^{-19}$

$\Phi=5.23\times10^{-19} J$

That's the work function of the metal we're dealing. So now if we want to know the wavelength to obtain the double of the kinetic energy we use:

$2K_{max} =\frac{hc}{\lambda} - \Phi$

Solving for $\lambda$ :

$\lambda = \frac{hc}{2K_{max}+\Phi}=\frac{(6.63\times10^{-34})(3.0\times10^{8})}{2(3.13\times10^{-19})+5.23\times10^{-19}}=1.73\times10^{-7}$

$\lambda=173 nm$

3 0

4 years ago

The graph shows the acceleration, velocity, and displacement of a marble attached to a metal spring that has been secured to a t

SpyIntel [72]

<span>D. When velocity at a maximum, acceleration is also at a maximum.

Acceleration is the rate of change of velocity so, it is directly proportional to it, hence, when it will increase velocity will also increase

Hope this helps!</span>

7 0

3 years ago

You have a mass of 95 kg. a. What is your weight on Earth?