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V125BC [204]
4 years ago
5

Why does light of a certain frequency need to be used to produce a current in the photoelectric effect?

Physics
1 answer:
olchik [2.2K]4 years ago
3 0
The reason to why does light of a certain frequency need to be used to produce a current in the photoelectric effect is <span>A. The frequency of light must be the same as the frequency of vibration of the atoms in the substance to cause a current.</span>
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How does kinetic energy affect the stopping distance of a small vehicle compared to a large vehicle?
Vilka [71]
Well, I may not know the exact answer, but I can confirm because of mass. The more mass an object has, the less control you have on it, so it can't be stopped easily. Let's take a small rock and a boulder for example. When a small rock rolls on the ground, it can easily be stopped by your hand or foot. But when you have to deal with an enormous boulder, you can't easily stop it with one just person. You'll need more people. So the answer is because the smaller vehicle has a lesser mass than the larger vehicle. (if you are looking for the answer, just look at the end. 
5 0
3 years ago
The ΔG of a reaction would be at the minimum when... Group of answer choices the equilibrium constant is equal to 1 (i.e., the r
Blizzard [7]

Answer:

the equilibrium constant is equal to 1 (i.e., the reactant and product concentrations are always equal).

Explanation:

ΔG is a symbol related to Gibbs free energy, which is a physical quantity related to thermodynamics. ΔG refers to the difference between the change in enthalpy (and sometimes entropy) and the temperature of a chemical reaction.

Gibbs free energy is very useful for measuring the work done between the reactants in a reaction. It is calculated using the formula: ΔG = change in enthalpy - (temperature x change in entropy).

The ΔG of a reaction would have a minimum value (zero), if the equilibrium constant is equal to 1 (that is, the concentrations of the reagent and the product are always equal).

5 0
4 years ago
Identify properties of a human body system
IceJOKER [234]

Answer:

integumentary, skeletal, muscular, nervous, endocrine, cardiovascular, lymphatic, respiratory, digestive, urinary, and reproductive

Explanation:

and this is biology not physics

5 0
3 years ago
The following number - 0.050437 - written to TWO significant figures would be
Sophie [7]

Answer:

0.050000

Explanation:

your welcome :)

7 0
3 years ago
Read the scenario and solve these two problems.
Burka [1]

Answers:

a) 5400000 J

b) 45.92 m

Explanation:

a) The kinetic energy K of an object is given by:

K=\frac{1}{2}mV^{2}

Where:

m=12000 kg is the mass of the train

V=30 m/s is the speed of the train

Solving the equation:

K=\frac{1}{2}(12000 kg)(30 m/s)^{2}

K=5400000 J This is the train's kinetic energy at its top speed

b) Now, according to the Conservation of Energy Law, the total initial energy is equal to the total final energy:

E_{i}=E_{f}

K_{i}+P_{i}=K_{f}+P_{f}

Where:

K_{i}=5400000 J is the train's initial kinetic energy

P_{i}=0 J is the train's initial potential energy

K_{f}=0 J is the train's final kinetic energy

P_{f}=mgh is the train's final potential energy, where g=9.8 m/s^{2} is the acceleration due gravity and h is the height.

Rewriting the equation with the given values:

5400000 J=(12000 kg)(9.8 m/s^{2})h

Finding h:

h=45.918 m \approx 45.92 m

7 0
3 years ago
Read 2 more answers
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