PHYSICS HIGH SCHOOL

All of the following are electromagnetic waves excepta. X rays.
b. sound waves.
c. gamma rays.
d. radio waves.

Answers

Answer 1
Answer:

Sound waves are longitudinal waves. All are the examples of Electromagnetic waves except the sound wave.

EM Waves:

EM waves are transverse waves means the propagation of the wave is the perpendicular the the wave oscillation.

Sound waves:

These are the longitudinal waves because the propagation of the wave is parallel to the vibration of particles.

  • It needs medium like air and water.
  • Its speed is very lesser than speed of EM wave.

Therefore, all are the examples of Electromagnetic waves except the sound wave.

To know more about sound wave,

brainly.com/question/21995826
Answer 2
Answer: b. sound waves
Sound waves need to travel through a medium such as a solid, liquid, or gas. The sound waves move through each of these mediums by vibrating the molecules in the matter. This means it isn't an electromagnetic waves but it is a wave, an example of the difference, all electromagnetic waves can travel in a vacuum at the universal speed limit, this is 299 792 458 m/s.

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Answers

Answer:

Give any one cultural practice

What happens to a chemical reaction when the temperature is increased ?

Answers

The rate of reaction speeds up because the particles are moving faster. Therefore there are more collisions and as each particle has more energy, there are more successful collisions
It starts or speeds up.
Some substances need certain amount of energy in order to react with each other.

When Emma pushes a bag with a force of 27 newtons, the coefficient of kinetic friction between the bag and the floor is 0.23. What is the normal force acting on the bag by the floor?. A. 0.085 newtons B. 27 newtons C. 2.7 × 10^2 newtons . D. 1.2 × 10^2 newtons

Answers

The normal force acting on the bag by the floor is calculated using th data on the force used to push the bag and the coefficient of friction between the bag and the floor. The normal force is determined through the formula Force / kin.coeff. Substituting, 27 N / 0.23 is equal to 117. 39 N. The answer is D.

Answer:

the answer is D, hope this helps

Explanation:

Ilya and Anya each can run at a speed of 8.90mph and walk at a speed of 3.80mph . They set off together on a route of length 5.00miles. Anya walks half of the distance and runs the other half, while Ilya walks half of the time and runs the other half.a)How long does it take Anya to cover the distance of 5.00miles ?
Express your answer numerically, in minutes.
b)Find Anya's average speed.
Express Anya's average speed save,Anya numerically, in miles per hour
C)How long does it take Ilya to cover the distance?
Express the time tIlya taken by Ilya numerically, in minutes.
d)Now find Ilya's average speed.
Express Ilya's average speed save,Ilya numerically, in miles per hour

Answers

Answer:

Part a)

T = 0.94 hours

Part b)

v_(avg) = 5.32 mph

Part c)

T = 0.79 h

Part d)

v_(avg) = 6.35 mph

Explanation:

Speed while she is running = 8.90 mph

speed while she walk = 3.80 mph

Part a)

Anya walks half the distance

so time to walk

t_1 = (2.5)/(3.80) = 0.66 h

time to cover the distance while she run

t_2 = (2.5)/(8.90) = 0.28 h

total time to cover the distance

T = t_1 + t_2

T = 0.94 hours

Part b)

Average speed is given as

v_(avg) = (d)/(t)

v_(avg) = (5.00 miles)/(0.94)

v_(avg) = 5.32 mph

Part c)

Half the time Llya walks and next half the time she runs

so total distance is given as

d = v_1(T/2) + v_2(T/2)

so we have

5.00 = 8.90(T/2) + 3.80(T/2)

T = 0.79 h

Part d)

Average speed is given as

v_(avg) = (d)/(t)

v_(avg) = (5.00 miles)/(0.79)

v_(avg) = 6.35 mph

What are electron orbitals

Answers

Answer:

Electron orbitals are energy levels or shells that an electron inhabits in an atom or a molecule. The number of orbitals in an atom depends on the number of protons in its nucleus. The electrons fill the orbitals from lowest to highest energy. The arrangement of electrons in the orbitals determines the behavior and properties of the atoms and molecules.

A stone falls from a ledge and takes 8 seconds to hit the ground. The stone has an original velocity of 0 m/s. How tall is the ledge? A. 313.6 meters B. 78.4 meters C. 39.2 meters D. 1,254.4 meters

Answers

The right answer for the question that is being asked and shown above is that: "D. 1,254.4 meters." A stone falls from a ledge and takes 8 seconds to hit the ground. The stone has an original velocity of 0 m/s. The ledge has the height of D. 1,254.4 meters

By the way, on the Penn Foster test, C. 1,254.4 meters is incorrect.
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