The average diameter of an atom is ________

(a) 10“8 m
(b) 1 m
(c) 1A°
(d) 10​

Answer:

B.) the object caused the wave to refract

Explanation:

The object has caused the wave which is traveling through the air to refract back. Thus, the correct option is B.

Refraction is the phenomena which includes the change in the direction of waves which occurs when the waves travel from one medium to another medium. Refraction is always accompanied by a wavelength and change in speed of the wave. Diffraction is the bending of waves of sound and light which takes place around the obstacles and openings.

A wave traveling through the air meets an object and bounced off its flat surface at a new angle will experience refraction of waves.

Therefore, the correct option is B.

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Answer:

The student took 400 seconds to run for 2 km

Explanation:

Average Speed

If an object travels a distance d in a time t regardless of the direction, the average speed is the quotient of the total distance traveled by the total time taken:

[tex]\displaystyle \bar v=\frac{d}{t}[/tex]

The student ran at an average speed of v=5 m/s and covered a distance of 2 km. Converting km to meters: d=2 km *1000= 2000 m. We must find the time the student needed run that distance, so we solve for t:

[tex]\displaystyle t=\frac{d}{\bar v}[/tex]

[tex]\displaystyle t=\frac{2000}{5}=400\ s[/tex]

The student took 400 seconds to run for 2 km

Explanation:

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Answer:

Described below

Explanation:

1) Solids: In solids, the strong attractive forces between the particles ensure that the particles are packed tightly enough and this means little or no movement between each other. However, when they experience vibration which has relationship with the kinetic energy between them

2) Liquids; In liquids due to the lesser forces of attraction between the particles, it means they tend to glide over each another but however, toward the bottom of the container they will settle. This means that the attractive forces between the liquid particles are barely strong enough to hold onto a specific volume. However, they are not strong enough to keep the molecules from sliding over one other.

3) Gases; In gases, there is almost no existing attractive force in most cases and as a result we can say the kinetic energy of the gas molecules is always greater than the attractive force between them and they are therefore far apart from each other and also move independent of each other.

Answer:

[tex]F=1.13\,*\,10^{15}[/tex] (answer a)

Explanation:

Recall the formula for the Coulomb force:

[tex]F=k\frac{q_1*q_2}{d^2}[/tex]

which in our case gives:

[tex]F=k\frac{q_1*q_2}{d^2} \\F=9*10^9\,\frac{63*45}{0.15^2} \\F\approx 1134000\,*\,10^9\\F\approx 1.13\,*\,10^{15}[/tex]

which agrees with answer a)

Answer:

Tension is 25 N in both ropes.

T1 = 25 N

T2 = 25 N

Explanation:

We are told that the 50 kg sign has been hung from two vertical ropes.

Now, from equilibrium of forces, since the ropes are vertical, the total tension of both ropes must equal the weight of the sign.

Let the tension in both ropes be T1 and T2.

Thus;

T1 + T2 = 50

Now, since the angles are vertical, the angle with the horizontal axis will be 90°.

Resolving along the horizontal axis gives;

T1 cos 90 = T2 cos 90

This means that T1 = T2.

Thus;

Since T1 + T2 = 50, if means that; T1 = T2 = 50/2 = 25 N

Answer:

Explanation:

To plot the given forces of 0.8 N and 0.9 N. It is convenient to take

0.1 N as 1 unit in Graph

For example, 1 unit in the graph is  1 cm

then take 0.1 N equivalent to 1 cm

[tex]0.8 N\equiv 8\ \text{units in graph}\\\\0.9\equiv 9\ \text{units in graph}[/tex]

Answer:

weight.................

Answer:

Explanation:(a) What is her weight on earth? (b) What are her mass and her weight on the moon, where g = 1.62 ms–2? Solution: (a) On earth. W = m g = 55.0 x 9.8 = 539 N. (b) On moon, her mass remains the same, but the acceleration due to gravity

Answer:

some times the glass breaks

Explanation:

Answer:

0m/s²

Explanation:

A body with a constant speed always has a zero acceleration

Hence if Korey ran around the track at 10 meters per second and had a constant speed and did not change directions, then his acceleration will be 0m/s² not considering his initial speed

Answer:

1. According to Newton's first law, when forces are balanced there is no acceleration

2.According to Newton's second law, when forces are unbalanced, there is acceleration

Explanation:

this is because Newton's first law of motion states that every object will continue in its state of rest or uniform motion in a straight line unless a resultant force acts on it

hopes this helps, if not, report it, someone else will do it

the answer is

10.5 g/cm3

Answer:

The answer is A.

Explanation:

The answer is A. because overload means to do more and Kai swims more and more every day.

Answer:

what do you mean?

Explanation:

wave length is the distance from one peak to the other.

which can be measured by cm,m,dM,mm etc

so the question that you give is the answer.

Answer:

i think its 3583.2km skskks

Answer:

840 km/h divided by 60 = 14km/min

3 x 60 = 180

180 + 20 = 200 minutes total

14 x 200 = 2800km

that is a really awkward way of doing it though. really you can just do:

840 x (10/3) = 2800km

The acceleration of the cheetah that has a mass of 60kg and produces a force of 480N is 8m/s²

HOW TO CALCULATE ACCELERATION:

Acceleration = 480 ÷ 60

Acceleration = 8m/s²

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Answer:

The present day model shows a nucleus composed of protons and neutrons with cloud-like spheres of different diameters surrounding the nucleus to represent the energy levels of the electrons in the atom. Rutherford's model shows electrons orbiting the nucleus along fixed, but similar- diameter circular paths.

Both models show the composition of the nucleus at the center of the atom and the much smaller electrons at some distance from the nucleus.

Explanation:

Neither of the models does a good job of representing the relative size differences of the protons, neutrons and electrons, or the distance between the nucleus and the "electron clouds."

Answer:

silver and copper

Explanation:

Answer:

place a curved elbow joint pipe over each end of the pipe to make a periscope

Answer:

Connect multiple hosts: Normally, a switch provides a large number of ports for cable connections, allowing for star topology routing. It is usually used to connect multiple PCs to the network. Forwards a message to a specific host: Like a bridge, a switch uses the same forwarding or filtering logic on each port. When any host on the network or a switch sends a message to another host on the same network or the same switch, the switch receives and decodes the frames to read the physical (MAC) address portion of the message. Manage traffic: A switch in networking can manage traffic either coming into or exiting the network and can connect devices like computers and access points with ease. Keep electrical signal undistorted: When a switch forwards a frame, it regenerates an undistorted square electrical signal. Increase LAN bandwidth: A switch divides a LAN into multiple collision domains with independent broadband, thus greatly increasing the bandwidth of the LAN.

Explanation:

Explanation:

The function of the switch is

Answer:

i- testing testing,, 1 2 1 2

Answer:

?

Explanation:

Did it work how you wanted?

Answer:

I think the heat would transfer from the engine, because of this it would cook the egg

Explanation:

hopes this helps

The thermal heat energy transfer happens when we fry an egg on a hot car engine because the thermal energy lost from the engine is utilized for cooking the egg,

It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy.

Thermal energy transfer is utilized while cooking food in our day-to-day life, frying egg is one such example of application of the thermal energy for cooking food.

Almost two third of the heat from any thermal engine is lost to the surroundings.

When we fried an egg on a hot vehicle engine, thermal energy is transferred because thermal energy lost from the engine is used to cook the egg.

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Answer:

The number of paces it would take to get to the Moon is 213,555,556 paces

Explanation:

The given length of Mr Galan's paces = 1.8 m/pace

The distance from the Earth to the Moon is, 384,400 km = 384,400,000 m

Therefore, the number of paces, "n", it would take to get to the Moon from the Earth is given as follows;

n = (The distance from the Earth to the Moon)/(The length of each Mr Galan's paces)

∴ n = 384,400,000 m/(1.8 m/pace) = 213,555,556 paces

The number of paces it would take to get to the Moon = n = 213,555,556 paces

there are 3 atoms in each silver sulfide

Answer:

acceleration =9.2089

Explanation:

force acting: gravity, normal force exerted by the box

F=m*a

= 25*g

=25*gcos(20)

= 230.224N

acceleration= gcos(20)

= 9.8*0.939

acceleration =9.2089

Answer:

also tripled, factor of 3

Explanation:

equation of momentum is p = m * v , where p=momentum, m=mass, and v=velocity

if m is unchanged

p1 = m1 *v1

p2 = m2 *v2

m1 = m2 and v2 = 3*v1

p2 = m1 * 3v1 = 3*p1, tripled momentum

Answer:

oxygen combines with small molecules. energy is released and it happens in the cytoplasm

Explanation:

Answer:

B,C,D are the correct answers i just did it one edge for the unit review.

Explanation: