The transfer of heat is through direct contact of particles is called

For using the law of reflection and Snell's law for refraction, the angles are measured Group of answer choices between the surf

Scrat [10]

Answer:

correct answer is the c

Explanation:

The laws of optical geometry are the law of reflection and refraction, in them the relationship between the incident angles and reflected or transmitted by a given surface is established, in these laws it is not specified how the angles should be measured by which they could measure as follows

.- between the beam and the surface

.- between lightning and normal, the most used

Let's check the answers

a) True.

b) True

c) True

We see that the three answers are true, but the answer c involves the other two, so the correct answer is the c

8 0

3 years ago

A circuit contains an EMF source, a resistor R, a capacitor C, and an open switch in series. The capacitor initially carries zer

Flura [38]

Answer:

t = 1.098*RC

Explanation:

In order to calculate the time that the capacitor takes to reach 2/3 of its maximum charge, you use the following formula for the charge of the capacitor:

$Q=Q_{max}[1-e^{-\frac{t}{RC}}]$ (1)

Qmax: maximum charge capacity of the capacitor

t: time

R: resistor of the circuit

C: capacitance of the circuit

When the capacitor has 2/3 of its maximum charge, you have that

Q=(2/3)Qmax

You replace the previous expression for Q in the equation (1), and use properties of logarithms to solve for t:

$Q=\frac{2}{3}Q_{max}=Q_{max}[1-e^{-\frac{t}{RC}}]\\\\\frac{2}{3}=1-e^{-\frac{t}{RC}}\\\\e^{-\frac{t}{RC}}=\frac{1}{3}\\\\-\frac{t}{RC}=ln(\frac{1}{3})\\\\t=-RCln(\frac{1}{3})=1.098RC$

The charge in the capacitor reaches 2/3 of its maximum charge in a time equal to 1.098RC

6 0

4 years ago

As velocity____kinetic energy _____ and potential energy _____

nataly862011 [7]

Answer:

increases increases decreases

Explanation:

For an object falling from a height

6 0

2 years ago

PLEASE HELP ME this is due in 20 mins!!!!!

Marizza181 [45]

The mechanical advantage of using this pulley system is equal to the amount of force used on the broomsticks. I used work times distance and the total distance was 15. I hope I answered this right lol!

8 0

3 years ago

How do carbon 12 and carbon 13 differ?

astraxan [27]

Answer:

A) & B)

Explanation:

First, the numbers 12 and 13 represent the atomic mass number of the atoms.

So, A) is true: thus Carbon12 and Carbon 13 have different mass numbers.

The mass number is equal to the total number of protons and neutrons. Consider that any element has the same number of protons, regardless of the number of neutrons. The number of protons in Carbon is 6.

The amount of neutrons can be calculated by: mass number minus number of protons.

For Carbon 12: $12-6=6$

For Carbon 13: $13-6=7$

B) is true, we just proved they have different amounts of neutrons.

In order for the charge of the atom to be neutral, the amount of electrons must be equal to the number of protons (as they have opposite charges). And we now know that the number of protons in Carbon12 and Carbon13 are always the same

C) is false, the number of electrons is the same in both atoms

The atomic charges in both are neutral, due to the fact that they have the same amount of protons and electrons in both cases. Is only the neutrons (thus the mass numbers)that change

D) is false, they have equal atomic charges

4 0

3 years ago