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4 years ago

7

What is it called when light shining on certain substances causes an electric current to flow? the polarized light phenomena inf

rared radiation the photoelectric effect the Einstein conclusion

2 answers:

Hunter-Best [27]4 years ago

5 0

Photoelectric effect

tamaranim1 [39]4 years ago

4 0

Photoelectric effect

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Using this information...

Pepsi [2]

$19.2\:\text{m/s}$

Explanation:

At the top of the tree, the velocity of the pebble is purely horizontal so we can calculate it as

$v_{y} = v_{0y} = v_0\cos 40° = (25\:\text{m/s})(0.766)$

$\:\:\:\:\:= 19.2\:\text{m/s}$

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3 years ago

What are two ways that machines can change the way that work is done?

algol [13]

Machines makes work easier by increasing the amount of force that is applied, and changing the direction in which the force is applied !! Hope it helped (p.s. I had this same question)

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3 years ago

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Which of the following is an example of kinetic energy being converted to potential energy?

horsena [70]

Of the following...?? Is there more to this question? :)

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3 years ago

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What is the resistance of a voltage of 65 V and a current of 2.2 A? Include units.

kozerog [31]

Answer:

29.5 ohms

Explanation:

R= V/I

= 65 / 2.2

= 29.5 ohms

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3 years ago

Cart 1 of mass m is traveling with speed 2vo in the +x-direction when it has an elastic collision with cart 2 of

iogann1982 [59]

Answer:

Explanation:

Momentum conservation

$m2v_0+2mv_0=mv_1+2mv_2 \quad (1/m) \quad 4v_0=v_1+2v_2\\$

Kinetic energy conservation

$\displaystyle \frac{1}{2}m(2v_0)^2+\frac{1}{2}2mv_0^2=\frac{1}{2}mv_1^2+\frac{1}{2}2mv_2^2 \quad (1/m) \quad 6v_0^2=v_1^2+2v_2^2$

Solve the system

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3 years ago