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4 years ago

If you wanted to change liquid water into solid ice you would _____ it

Physics

2 answers:

kirza4 [7]4 years ago

7 0

you would freeze it!

AleksandrR [38]4 years ago

3 0

If you wanted to change liquid water into solid ice you would freeze it. Water freezes when temperature is 32 degrees Fahrenheit or lower.

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3. Which of the following is NOT a function of the liver?

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Answer:

C) to produce white blood cells

Explanation:

Your liver does all of the others things except produce white blood cells

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3 years ago

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At 25 mph, it will take you about how many feet to stop your car?

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It will take approximately 8 - 10 feet.

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3 years ago

Copy of AL

tamaranim1 [39]

Answer:

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4 years ago

The work function of a metal surface is 4.80 × 10-19 J. The maximum speed of the electrons emitted from the surface is vA = 7.7

poizon [28]

Answer:

$\lambda_A=2.65177\times 10^{-7}\ m$

$\lambda_B=3.32344\times 10^{-7}\ m$

Explanation:

h = Planck's constant = $6.63\times 10^{-34}\ m^2kg/s$

c = Speed of light = $3\times 10^8\ m/s$

m = Mass of electron = $9.11\times 10^{-31}\ kg$

$W_0$ = Work function = $4.8\times 10^{-19}\ J$

$v_A$ = Velocity of A particle = $7.7\times 10^5\ m/s$

$v_B$ = Velocity of B particle = $5.1\times 10^5\ m/s$

The wavelength is given by

$\lambda=\frac{hc}{\frac{1}{2}mv^2+W_0}$

$\lambda_A=\frac{6.63\times 10^{-34}\times 3\times 10^8}{\frac{1}{2}9.11\times 10^{-31}(7.7\times 10^5)^2+4.8\times 10^{-19}}\\\Rightarrow \lambda_A=2.65177\times 10^{-7}\ m$

The wavelength $\lambda_A=2.65177\times 10^{-7}\ m$

$\lambda_B=\frac{6.63\times 10^{-34}\times 3\times 10^8}{\frac{1}{2}9.11\times 10^{-31}(5.1\times 10^5)^2+4.8\times 10^{-19}}\\\Rightarrow \lambda_B=3.32344\times 10^{-7}\ m$

The wavelength $\lambda_B=3.32344\times 10^{-7}\ m$

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4 years ago