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4 years ago

10

What does the outer part of the disk turn into?

1 answer:

My name is Ann [436]4 years ago

8 0

Answer:

what does the outer part of the disk turn into

Explanation:

4) it gets sucked into the star

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Calculate the work function that requires a 455 nm photon to eject an electron of a value 0.73 eV

elena55 [62]

Answer:

W = 2 eV

Explanation:

Given that,

The wavelength of a photon = 455 nm

The kinetic energy of a photon, K = 0.73 eV

We need to find the work function of the electron. It can be solved using Einstein's equation such that,

$W=E-K$

E is the energy of the photon

So,

$W=\dfrac{hc}{\lambda}-K\\\\W=\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{455\times 10^{-9}\times 1.6\times 10^{-19}}-0.73\\\\W= 2.73\ eV-0.73\ eV\\\\W=2\ eV$

So, the work function of the metal is 2 eV.

3 0

3 years ago

How does the law of conservation of energy relate to the system shown in this model

egoroff_w [7]

Answer: The law of conservation of energy is a physical law that states energy cannot be created or destroyed but may be changed from one form to another. Another way of stating this law of chemistry is to say the total energy of an isolated system.

Explanation:

3 0

3 years ago

Read 2 more answers

True or False: Graphs provide a good visual representation of the relationships between the factors investigated in an experimen

Alecsey [184]

Answer:

True

Explanation:

Yes, the graph provides a good visual representation of the relationship between the factors being investigated when there are only two variables being studied at a time.
Sometimes a third variable is represented on a negative y-axis which plays a minor role in any one of the factors that may be conveniently represented.
Since we can draw only 2-dimensional diagrams on a paper, therefore, graphs are restricted to a couple of variables.
The independent variable is usually represented on the x-axis and the dependent variable is represented on the y-axis.
Graphs tell us the pattern of variation of a quantity with respect to another.

8 0

3 years ago

Tether ball is a game children play in which a ball hangs from a rope attached to the top of a tall pole. The children hit the b

Murljashka [212]

Answer:

a_total = 14.022 m/s²

Explanation:

The total acceleration of a uniform circular motion is given by the following formula:

$a=\sqrt{a_c^2+a_T^2}$ (1)

ac: centripetal acceleration

aT: tangential acceleration

Then, you first calculate the centripetal acceleration by using the following formula:

$a_c=r\omega^2$

r: radius of the circular trajectory = 2.0m

w: final angular velocity of the ball = 7.0 rad/s

$a_c=(2.0m)(7.0rad/s)^2=14.0\frac{m}{s^2}$

Next, you calculate the tangential acceleration. aT is calculate by using:

$a_T=r\alpha$ (2)

α: angular acceleration

The angular acceleration is:

$\alpha=\frac{\omega_o-\omega}{t}$

wo: initial angular velocity = 13 rad/s

t: time = 15 s

Then, you use the expression for the angular acceleration in the equation (1) and solve for aT:

$a_T=r(\frac{\omega_o-\omega}{t})=(2.0m)(\frac{7.0rad/s-13.0rad/s}{15s})=-0.8\frac{m}{s^2}$

Finally, you replace the values of aT and ac in the equation (1), in order to calculate the total acceleration:

$a=\sqrt{(14.0m/s^2)^2+(-0.8m/^2)^2}=14.022\frac{m}{s^2}$

The total acceleration of the ball is 14.022 m/s²

5 0

3 years ago

Mercury is a liquid metal at room temperature. It’s symbol is Hg. How many electron clouds does Mercury have? ________

IrinaVladis [17]

I looked it up and here's what it said

To balance the charge of 80 protons this atom has<u> </u><u><em>a cloud of 80</em></u><em> </em>electrons spinning around its nucleus.

6 0

3 years ago

Read 2 more answers