Where does wave reflection occur?at boundaries between two different media
while a wave is propagating through a single media
when two waves moving in opposite directions collide
none of the above

Answers

Answer 1

Answer: The correct answer for the question that is being presented above is this one: "none of the above." Wave reflection happens there is a change in direction of a wavefront. This wavefront is at an interface between two different media, which makes the wavefront returns into where it is originated.

Answer 2

Answer:

Answer:

The correct answer is actually "at boundaries between two different media"

Explanation:

Checked and it is said word for word in the corresponding slide

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The more particles a substance has at a given temperature, the more thermal energy it has. Please select the best answer from the choices provideda. True
b. False

Answers

this is true because The mass of the warm balloon is the same as the mass in the cold balloon. In the warm balloon, the gas molecules are free of each other and moving rapidly because of all the energy they have. They collide with each other and with the wall of the balloon exerting pressure, which gives the balloon its size (volume). As the balloon cools in the cooler (freezer), the air molecules transfer energy to the surrounding cooler (freezer). The molecules of air are still free of each other but they do not move as rapidly or as far apart and their collisions with the balloon walls are not as forceful. As a result the volume of the balloon containing the cool air decreases. Heat and cool only speed up or slow down the motion of the molecules. When the balloon was heated with the flame the molecules where moving so much that they transferred their heat and energy to the balloon walls causing it to pop.

Answer:

true

Explanation:

i think it is?

the mass of an object is a) equal to its weight on the surface of the earth. b) sometimes equal to its weight. c) never equal to its weight. d) equal to its weight in deep space.

Answers

Answer:

a) equal to its weight on the surface of the earth.

Explanation:

The mass of an object is a measure of the amount of matter it contains and is typically expressed in kilograms (kg) or grams (g). Weight, on the other hand, is the force of gravity acting on an object's mass. The weight of an object depends on the strength of the gravitational field it's in. On the surface of the Earth, where the gravitational field is relatively constant, an object's weight is directly proportional to its mass, and the two are equal. This relationship is described by the equation:

Weight (W) = Mass (m) x Acceleration Due to Gravity (g)

On the surface of the Earth, the acceleration due to gravity (g) is approximately 9.8 m/s². Therefore, an object's weight is equal to its mass times 9.8 m/s².

So, on the surface of the Earth, the mass of an object is equal to its weight. In deep space, where there is negligible gravitational force, an object's weight would be nearly zero, but its mass remains the same.

Which states the law of conservation of energy?A.
Energy cannot be created or destroyed, but it can be converted or changed into different forms.

B.
Energy can be created or destroyed, and it can be converted or changed into different forms.

C.
Energy cannot be created or destroyed, nor can it be converted or changed into different forms.

D.
Energy can be created or destroyed, but it can not be converted or changed into different forms.

Answers

Statement A is correct. Energy cannot be created or destroyed it can only be converted or changed into different forms.

The other forms include kinetic, potential and internal energy. Heat, and work are also other forms of energy.

b. Energy can be created or destroyed, and it can be converted or changed into different forms.

A 2.0-kilogram mass is located 3.0 meters abovethe surface of Earth. What is the magnitude of
Earth’s gravitational field strength at this
location?
(1) 4.9 N/kg (3) 9.8 N/kg
(2) 2.0 N/kg (4) 20. N/kg

Answers

The correct answer is: Option (3) 9.8 N/kg

Explanation:

According to Newton's Law of Gravitation:

$F_g = (GmM)/(R^2)$ --- (1)

Where G = Gravitational constant = 6.67408 × 10⁻¹¹ m³ kg⁻¹ s⁻²

m = Mass of the body = 2 kg

M = Mass of the Earth = 5.972 × 10²⁴ kg

R = Distance of the object from the center of the Earth = Radius of the Earth + Object's distance from the surface of the Earth = (6371 * 10³) + 3.0 = 6371003 m

Plug in the values in (1):

(1)=> $F_g = (6.67408 * 10^(-11) * 2 * 5.972*10^(24))/((6371003)^2) = 19.63$

Now that we have force strength at the location, we can use:

Force = mass * gravitational-field-strength

Plug in the values:

19.63 = 2.0 * gravitational-field-strength

gravitational-field-strength = 19.63/2 = 9.82 N/kg

Hence the correct answer is Option (3) 9.8 N/kg

(3) 9.8 N/kg is your answer.

A sample of gold has a mass of 38.6 grams and a volume of 2 cm3. What is the density of gold

Answers

The density of the sample of gold whose mass is 38.6 grams and with a volume of 2 cm³ is 19300 kg/m

Density: This can be defined as the ratio of mass and velocity. The S.I unit of density is kg/m³.

The question above can be solved using the formula below

D = m/V.................... Equation 1

Where D = density of the sample of gold, m = mass of gold, V = volume of gold.

From the question,

Given: m = 38.6 g, = 0.0386 kg, V = 2 cm³ = 0.000002 m³

Substitute these values into equation 1

D = 0.0386/0.000002

D = 19300 kg/m³

Hence the density of the sample of gold is 19300 kg/m³

Learn more about density here: brainly.com/question/23562510

Answer:

$19.3 g/cm^3$

Explanation:

The density of a material is given by

$\rho = (m)/(V)$

where

m is the mass of the sample

V is its volume

for the sample of gold in this problem,

m = 38.6 g

$V=2 cm^3$

Substituting into the formula, we find the density of gold:

$\rho = (38.6)/(2)=19.3 g/cm^3$

A pendulum takes .5 seconds tp complete one cycle. what is the pendulum"s period and frequency?

Answers

You just told us how long the pendulum takes to complete one cycle. That's the definition of the period. Its 1/2 second.

The frequency is the reciprocal of the period. That's 2 per second. Or 2 Hz.

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Where does wave reflection occur?at boundaries between two different media while a wave is propagating through a single media when two waves moving in opposite directions collide none of the above

Answers

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Where does wave reflection occur?at boundaries between two different media
while a wave is propagating through a single media
when two waves moving in opposite directions collide
none of the above