A wave passes into a different medium with an increase in speed. The ratio of the angle of incidence to the angle of refraction, defined arbitrarily here as R, is?
a) R=0
b) 1>R>0
c) R=1
d) R>1

Answer:

2.61 J

Explanation:

Since potential energy U = mgy where m = mass of object, g = acceleration due to gravity = 9.8 m/s² and y = height of object above the ground.

Now for the coffee mug, m= 0.422 kg and it is 0.63 m on a table, so it is 0.63 m above the ground. Thus, y = 0.63 m.

We compute U

U = mgy

= 0.422 kg × 9.8 m/s² × 0.63 m

= 2.605 J

≅ 2.61 J

So, the potential energy of the mug with respect to the floor is 2.61 J

Answer:

The boat will go faster.

Explanation:

Bacchae when the water is warm it will evaporate and rain

it will lead to

icl melting

change in climate

change in temperature

change in weather

Answer:

As greenhouse gases trap more energy from the sun, the oceans are absorbing more heat, resulting in an increase in sea surface temperatures and rising sea level. Changes in ocean temperatures and currents brought about by climate change will lead to alterations in climate patterns around the world.

Answer:

Frequency = 5.49Hz

Explanation:

Given the following data

Velocity = 41m/s

Wavelength = 225m

[tex] Velocity = wavelength * frequency [/tex]

Making frequency the subject of formula, we have;

[tex] Frequency = \frac {wavelength}{velocity} [/tex]

Substituting into the equation, we have;

[tex] Frequency = \frac {225}{41} [/tex]

Frequency = 5.49Hz

Therefore, the frequency of the earthquake is 5.49 Hertz.

Answer:

D

Explanation:

Answer:

a) The strength of gravity decreases if one moved away from Jupiter

b) The strength of gravity increases if one fell into Jupiter

Explanation:

The gravitational attraction is given by Newton law of gravitation as follows;

[tex]Force \ (strength) \ of \ gravity = \dfrac{G \times M \times m}{R^2}[/tex]

Where;

G = The universal gravitational constant = 6.67408 × 10⁻¹¹ m³/(kg·s²)

M = The mass of Jupiter

m = The mass of the nearby body

R = The distance between the centers of Jupiter and the body

From the equation, we have that the gravitational strength varies inversely with the square of the separation distance between two bodies

Therefore, as one moves away, R increases, and the strength of gravity reduces

Similarly as the body falls into Jupiter, R, reduces the gravitational strength increases.

Answer:

2nd one Force

Explanation:

Without a source of force and object won't have the capability of moving.

Answer:

force

Explanation:

pushing something forward

Answer:

v = 10 m/s

Explanation:

recall that velocity is related to wavelength and frequency by the formula

v = fλ

where v = velocity, f = frequency and λ= wavelength

Simply substitute these into the formula:

v = fλ

v = (0.5)(20)

v = 10 m/s

Answer:

[tex]11.3\ \text{g/cm}^3[/tex]

[tex]7.92\ \text{g/cm}^3[/tex]

[tex]238.1\ \text{cm}^3[/tex]

Explanation:

8) Volume of lead

[tex]V=4.5\times 5.2\times 6\\\Rightarrow V=140.4\ \text{cm}^3[/tex]

m = Mass of block = 1587 g

Density is given by

[tex]\rho=\dfrac{m}{V}\\\Rightarrow \rho=\dfrac{1587}{140.4}\\\Rightarrow \rho=11.3\ \text{g/cm}^3[/tex]

Density of lead is [tex]11.3\ \text{g/cm}^3[/tex]

9) Volume of lead = Volume of water displaced = (49.1-45.5) = 3.6 mL = [tex]3.6\ \text{cm}^3[/tex]

m = Mass of iron = 28.5 g

Density is given by

[tex]\rho=\dfrac{m}{V}\\\Rightarrow \rho=\dfrac{28.5}{3.6}\\\Rightarrow \rho=7.92\ \text{g/cm}^3[/tex]

The density of iron is [tex]7.92\ \text{g/cm}^3[/tex]

10) m = Mass of silver = 2500 g

[tex]\rho[/tex] = Density of silver = [tex]10.5\ \text{g/cm}^3[/tex]

Volume is given by

[tex]V=\dfrac{m}{\rho}\\\Rightarrow V=\dfrac{2500}{10.5}\\\Rightarrow V=238.1\ \text{cm}^3[/tex]

The volume of silver is [tex]238.1\ \text{cm}^3[/tex]

The amount of force that provides an acceleration of 35m/s² with a mass of 80,000kg is 2,800,000N.

HOW TO CALCULATE FORCE:

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Answer: The 6 kg rock sitting on a 3.2 m cliff.

Explanation:

The potential energy of an object of mass M that is at a height H above the ground us:

U = M*H*g

where g is the gravitational acceleration:

g = 9.8m/s^2

Then:

"An 8 kg rock sitting on a 2.2 m cliff"

M = 8kg

H = 2.2m

U = 8kg*2.2m*9.8 m/s^2 = 172.48 J

"a 6 kg rock sitting on a 3.2 m cliff"

M = 6kg

H = 3.2m

U = 6kg*3.2m*9.8m/s^2 = 188.16 J

You can see that the 6kg rock on a 3.2m cliff has a larger potential energy.

Answer:

Potential

Explanation:

The water in the bathtub has more potential energy than that in the tea cup because it has a greater number of water molecules.

Mass is a parameter that is very instrumental in determining potential energy.

The potential energy of a body is the energy due to the position of that body.

   Potential energy  = mass x acceleration due gravity x height

Mass is the amount of matter in a substance. Water in the tub will have more mass and contain a greater number of water molecules there in.

Since potential energy is directly proportional to mass, then, it will have a greater amount of potential energy.

Answer:

decrease and neutralize each other

Explanation:

Answer:

Explanation:

I am assuming your question is "How are lightning storms caused?"

When tiny ice droplets bump into each-other while falling from the sky build up electricity and the cloud fills up with electrical charges. The lighter positevely charged particles are at the top part of the cloud and the heavier negatevely ones sink to the bottom part of the cloud. And once they grow big enough a spark is formed (Positives and negatives attract) just like static electricity but scaled up

Depends on what units you are using but

0.028196 gravitational acceleration on earth

0.2765 meters per second squared

0.9072  feet per second squared

Answer:

Interval training is simply alternating short bursts (about 30 seconds) of intense activity with longer intervals (about 1 to 2 minutes) of less intense activity. For instance, if your exercise is walking and you're in good shape, you might add short bursts of jogging into your regular brisk walks.

Explanation:

Answer:

Interval training is simply alternating short bursts (about 30 seconds) of intense activity with longer intervals (about 1 to 2 minutes) of less intense activity. For instance, if your exercise is walking and you're in good shape, you might add short bursts of jogging into your regular brisk walks

Explanation:

When A slider is moving to the right across unpacked snow and skidding to a stop, forces act upon the slider are: Normal force, Friction force, Gravity force.

An object's push or pull is seen as exerting a force. The interaction of the objects produces push and pull. You can also use words like stretch and squeeze to describe force.

The definition of force in physics is: the push or pull on a mass-containing item changes its velocity.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.

When a slider is moving to the right across unpacked snow and skidding to a stop gravitational force due to his weight, normal reaction force and frictional resistance force will act upon the slider.

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Answer:

t = 180 s = 3 minutes

Explanation:

The formula for the uniform speed of any object or element is given as:

V = S/t

t = S/V

where,

S = Distance between star and exoplanet = 5.4 x 10¹⁰ m

V = Speed of the light = 3 x 10⁸ m/s

Therefore, using these values in the equation, we get:

t = (5.4 x 10¹⁰ m)/(3 x 10⁸ m/s)

t = 180 s = 3 minutes

Hence, the light must reach the exoplanet in 3 minutes.

Answer:

The gravitational field of the Sun on Earth is greater than the gravitational field of the Sun on Neptune.

Explanation:

From Newton's law of universal gravitation,

F = [tex]\frac{GMm}{R^{2} }[/tex] ............. 1

where F is the force, G is the gravitational constant, M is the mass of the bigger object, m is the mass of the smaller object and R is the distance between their centers.

Also, Newton's second law of motion state;

F = mg ................ 2

where F is the force, m is the mass and g is the gravitational force.

Equating 1 and 2,

mg = [tex]\frac{GMm}{R^{2} }[/tex]

⇒ g = [tex]\frac{GM}{R^{2} }[/tex]

Given that the distance between the Sun and Earth is 1.5 x [tex]10^{11}[/tex] m, then the gravitational field of the Sun on Earth,

gSE = [tex]\frac{GM}{(1.5*10^{11}) ^{2} }[/tex]

       = [tex]\frac{GM}{2.25*10^{22} }[/tex] .................. 3

Given that the distance between the Sun and Neptune is 4.5 x [tex]10^{12}[/tex] m, then the gravitational field of the Sun on Neptune,

gSN = [tex]\frac{GM}{(4.5*10^{12}) ^{2} }[/tex]

        = [tex]\frac{GM}{2.025*10^{25} }[/tex] ............. 4

Comparing equations 3 and 4, it can be observed that gSE > gSN.

The gravitational field of the Sun on Earth is greater than the gravitational field of the Sun on Neptune.

There are a total of 12 chairs in each row, and the scenario is represented by the equation 8c = 96.

Any mathematical statement that includes numbers, variables, and an arithmetic operation between them is known as an expression or algebraic expression. In the phrase 4m + 5, for instance, the terms 4m and 5 are separated from the variable m by the arithmetic sign +.

Given, there are 96 chairs and all Kayla wants there to be eight rows.

Let "c" be the number of chairs in each row,

Since there is a total of 96 chairs and 8 rows.

The equation for the situation is:

8 *c = 96

So,

In 8 rows there are a total number of chairs = 96

In each row, there are a total number of chairs = 96/8

In each row, there are a total number of chairs = 12

Therefore, the equation that represents the situation is 8c = 96 and there is a total of 12 chairs in each row.

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Answer:

(A.) it is true

Explanation:

the stop strategy

1. State the situation or problem.

2.Tell the person what you want.

3.Offer an opportunity to respond.

4.Provide closure (review, summary, or thanks).

could help you explain the situation to your peer

Answer:

sorry, there is no picture, try re-uploading it with the pic

Explanation:

Answer:

Hank u so much out don't know how much this rally

Explanation:

Silicon most likely a metalloid with properties of both metals and nonmetals. So, the correct option is D.

A metalloid is defined as a substance having the properties which is intermediate between that of both metals and non-metals.

Here,

Silicon is classified as a metalloid, because it exhibits the properties of both metals and non-metals.

Silicon or Si is an element that is belonging to the group 14 and period 3 of the periodic table.

Silicon is not highly reactive, it reacts very mildly. It is a crystalline solid and is hard and and brittle. Silicon has a blue-grey metallic luster.

Silicon consists of only 4 valence electrons. Therefore, it can either accept or donate electrons in order to complete the octet.

Therefore, it is called as a metalloid.

Hence,

Silicon most likely a metalloid with properties of both metals and nonmetals.

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Answer:

kinetic energy..........

Answer: In SI units, G has the value 6.67 × 10-11 Newtons kg-2 m2. The direction of the force is in a straight line between the two bodies and is attractive. Thus, an apple falls from a tree because it feels the gravitational force of the Earth and is therefore subject to “gravity”.

Explanation:

Answer:

ya thats right they cant swim

Explanation: