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Xelga [282]
4 years ago
13

What is the photoelectric effect?

Physics
2 answers:
Veronika [31]4 years ago
5 0

Answer:

emissions of electrons from a metal

Explanation:

I did grad point

n200080 [17]4 years ago
4 0

the emission of electrons or other free carriers when light shines on a material.

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A ball of mass m strikes a wall perpendicularly with a speed v, and it bounces off the wall perpendicularly with a speed v 5 . W
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Answer:

Explanation:

Given

mass of ball is m

initial velocity of ball is v

Final velocity of ball is v_5

Impulse is the change in momentum of an object when an external force is applied for a given interval of time.

Initial momentum P_i=mv

Final momentum P_f=mv_5

Impulse=P_f-P-i=m(v_5-v)

     

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Which of the following characteristics is a quality of a socially developing economy?
tensa zangetsu [6.8K]

Answer:

C

Explanation:

Got it right

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In an experiment, a researcher can make claims about causation
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<span>In an experiment, a researcher can make claims about causation if the independent variable changes because of changes made to the dependent variable. Causation works on cause and effect, so the changed independent variable is the cause and the changed dependent variable is the effect. In an experiment the independent variable is changed to determine the dependent variables value, so the two are directly related.</span>
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3 years ago
A current of 1.75 A flows through a 55.4 Ω resistor for 9.5 min. How much heat was generated by the resistor? Answer in units of
kirill115 [55]

Answer:

9.67\times 10^4 J

Explanation:

We are given that

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Resistance =R=55.4 ohm

Time=t=9.5 min=9.5\times 60=570 s

1 min=60 s

We have to find the heat generated by the resistor.

We know that

Heat=E=I^2Rt

Using the formula

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Hence, the heat generated by the resistor =9.67\times 10^4 J

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What comes into your mind when you hear the words momentum
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