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Evgen [1.6K]
3 years ago
14

10 Select the correct answer. What property of a wave remains unchanged when a wave enters a different medium? O A amplitude OB.

frequency OC. wavelength OD. velocity O E. density Reset​
Physics
2 answers:
Mama L [17]3 years ago
8 0

a and b ik thats the awser becuse imjust did it

inna [77]3 years ago
3 0

Answer:

<h2>B frequency </h2>

Explanation:

if the frequency changes so does the energy and that doesn't happen to EM waves entering a medium by the conservation of energy

Correct me if im wrong but im 100% its B

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200 mL of an ideal gas is placed in a piston and is held at a pressure of 500 torr. If the temperature is held constant and the
galina1969 [7]

Answer:

V₂=153.84 m L

Explanation:

Given that

Initial volume ,V₁ = 200 m L

Initial pressure ,P₁= 500 torr

Final pressure P₂ = 650 torr

Lets take the final volume =V₂

Given that process occurs at constant temperature and we know that for constant temperature process

P₁ V₁ = P₂ V₂

V_2=\dfrac{P_1V_1}{P_2}

Now by putting the values

V_2=\dfrac{500\times 200}{650}\ mL

V₂=153.84 m L

Therefore the new volume of the gas will be 153.8 4mL.

7 0
3 years ago
A boy is leaning into a wall with a horizontal force of 15 N. Which of the following best describes the vector force the wall is
JulsSmile [24]

The vector force the wall is applying to the boy is -15 N; option D

<h3>What is a reaction force?</h3>

A reaction force is a force which is equal in magnitude but oppositely directed to a force acting in a particular direction.

The reaction force on the boy is equal in magnitude to the weight of the boy but has an opposite direction.

In conclusion, the vector force applied by the wall on the boy is -15 N.

Learn more about reaction force at: brainly.com/question/1013858

#SPJ1

7 0
3 years ago
A cart of mass M is attached to an ideal spring that can stretch and compress equally well. The cart and spring rest on a smooth
Alexxx [7]

We have to remember a point , which is ' the cart or spring rest on a smooth horizontal track ' , i.e., any frictional force doesn't take place.

<u>Explanation:</u>

a) According to the question the cart is pulled to position A and released, i.e., the velocity of the cart at A initially (say time,t=0) is 0 m/s ,then moves toward position E, where it reverses direction and returns again to position A , in the 2nd phase cart moves along A to E , the cart's velocity increase and again goes to zero at point E and again change the direction, hence

( File has been attached)

b) Let's , the distance between two consecutive points is x meter and the spring constant is k N.m  

c) ( File has been attached)

d) Movinf Right

e) Moving left

4 0
3 years ago
19
Anettt [7]

Proton: Its electrical charge is +1, its mass is 1, it's found in the nucleus

Neutron: Its electrical  charge is 0, its mass is 1, it's found in the nucleus

Electron: Its electrical charge is -1, its mass is negligible, it's found outside the nucleus

Explanation:

Atoms consist of three types of particles:

  • Proton: the proton is found in the nucleus of the atom, and it has a positive electric charge, equal to +1.6\cdot 10^{-19}C (expressed in units of fundamental charge, it has a charge of +1). Its mass is 1.67\cdot 10^{-27}kg, while its mass expressed in atomic mass units is 1 a.m.u
  • Neutron: the neutron is also found in the nucleus of the atom, and it has no electric charge. Its mass is similar to the mass of the proton (slightly larger), and neutrons and protons are held together in the nucleus by the presence of the strong nuclear force
  • Electron: the electron orbits around the nucleus, far away from it. It has negative electric charge, opposite to that of the proton (-1.6\cdot 10^{-19}C, or -1 in units of fundamental charge). Its mass is much lower than that of the proton, approximately 1800 times smaller, so it can be considered as negligible.

Learn more about atoms:

brainly.com/question/2757829

#LearnwithBrainly

8 0
4 years ago
A 22.0 ohm and 75.0 ohm resistor are in parallel, connected to a 5.00 v battery. how much current flows out of the battery
Julli [10]

Answer:

294 mAmps

Explanation:

The two resistors are equal to   22 * 75 / ( 22+ 75) = 17.01 ohm

V = IR

V/R = I

5 / 17.01 = .294 A

5 0
2 years ago
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