Sarah drives her car with a constant speed of 64 km/h. How long will she take to travel a
distance of 173.6 kilometers? Round to the nearest TENTH

Answer:

0.05s

Explanation:

frequency = speed / wavelength = 20/1 = 20Hz. Thus period = 1/f = 1/20 = 0.05 s

This question involves the concepts of wave speed and wavelength.

The period of the wave is "0.05 s".

The wave speed is given in terms of wave frequency and wavelength as follows:

[tex]v=f\lambda\\\\f=\frac{v}{\lambda}[/tex]

where,

Therefore,

[tex]f=\frac{20\ m/s}{1\ m}\\\\[/tex]

f = 20 Hz

Now, the period of the wave is the reciprocal of the frequency of the wave:

[tex]Period = T=\frac{1}{f}\\\\T=\frac{1}{20\ Hz}[/tex]

T = 0.05 s

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Answer: The gravitational  force between the sun and Saturn is [tex]3.69\times 10^{22}N[/tex]

Explanation:

[tex]F=\frac{Gm_1m_2}{r^2}[/tex]

where F = gravitational force  = ?

G = gravitational constant = [tex]6.674\times 10^{-11} Nm^2kg^{-2}[/tex]

[tex]m_1[/tex] = mass of sun = [tex]1.99\times 10^{30}kg[/tex]

[tex]m_2[/tex] = mass of saturn = [tex]5.68\times 10^{26}kg[/tex]

r = distance between sun and saturn = [tex]1.43\times 10^{12}m[/tex]

[tex]F=\frac{6.674\times 10^{-11}Nm^2kg^{-2}\times 1.99\times 10^{30}kg\times 5.68\times 10^{26}kg}{(1.43\times 10^{12}m)^2}[/tex]

[tex]F=3.69\times 10^{-90}N[/tex]

Thus the gravitational  force between the sun and Saturn is [tex]3.69\times 10^{22}N[/tex]

Answer:

mowing a lawn

Explanation:

Entropy is the degree of disorderliness of a system. As a body moves from a more ordered state to a less ordered one, the entropy of the system increases.

Answer:

Falling leaves!

Explanation:

I got it right on EDGE2021. ^^ Hope it helps!~ Remember, I'm proud of you. <3

Answer:

I belive that the 2000 kg will be going faster then the 1000kg

Explanation:

Because it is 2x as heavy as the other car which means it most likely would hit the car and keep going because it can hit it so hard that the car dosent hit effected

Answer:

They will attract when its north and south but will repel when its south and south or north and north

Answer:

Jupiter

Explanation:

Answer:

jupiter

Explanation:

biggest planet strongest gravitational force

Answer:

True

Explanation:

The statement is true because According to Schrödinger it's not possible to get the exact position of where an electron is located. However, he showed from an equation that we can at determine the most likely area where an electron will be and he said they are most likely to be in the most dense area of the clouds.

Answer:

it is true

Explanation:

Answer: 721.13

Explanation:

The density of the gasoline will be "721.13 kg/m²". To understand the calculation, check below.

According to the question,

Mass, m = 58.7 kg

Volume, V = 0.0814 m³

We know the relation,

→ Density = [tex]\frac{Mass}{Volume}[/tex]

or,

→            d = [tex]\frac{m}{V}[/tex]

By substituting the values, we get

                = [tex]\frac{58.7}{0.0814}[/tex]

                = 721.13 kg/m²

Thus the above approach is correct.

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Answer:

The magnitude of the coefficient of kinetic friction is approximately 1.304 × 10⁻⁵

Explanation:

The given parameters are;

The time it takes for the box to stop, "t" = 600 seconds

The distance the box moves before coming to a stop, "d" = 23 meters

The work done by the friction force to stop the block = The kinetic energy lost by the box

The work done by the friction force to stop the block = [tex]\mu _k[/tex]·m·g·d

The kinetic energy change of the block = 1/2·m·u²

Where;

g = The acceleration due to gravity = 9.8 m/s²

m = The mass of the box

[tex]\mu _k[/tex] = The coefficient of kinetic friction

d = The distance travelled by the block = 600 m

u = The initial velocity of the block

∴ [tex]\mu _k[/tex]·m·g·d = 1/2·m·u²

[tex]\mu _k[/tex]·g·d = 1/2·u²

[tex]\mu _k[/tex] = 1/2·u²/(g·d) = 1/2·u²/(9.8 × 23) = u²/450.8

∴  [tex]\mu _k[/tex] = u²/450.8...(1)

The kinematic equation of motion of the block can be presented as follows;

v = u - a·t

Where;

v = The final velocity = 0 m/s (The block slides to a stop)

u = The initial velocity

a = The acceleration of the block (the minus sign indicates that the block's velocity is decreasing)

t = The time of motion of the block = 600 seconds

Therefore, by substituting the above values, we have;

0 = u - 600·a

∴ u = a·600

The kinematic equation of motion for the distance moved by the block, "s" can be expressed as follows;

s = u·t - 1/2·a·t²

Where;

s = The distance moved by the bloc = 23 meters

∴ 23 = a·600·600 - 1/2·a·600² = 360,000·a - 1/2·a·360,000 = 180,000·a

a = 23/(180,000)

u = 600 × (23/(180,000)) = 23/300

The initial velocity, u = 23/300 m/s

From equation (1), we have;

[tex]\mu _k[/tex] = u²/(450.8) = (23/300)²/450.8 = 23/1764000 ≈ 1.304 × 10⁻⁵

The magnitude of the coefficient of kinetic friction, [tex]\mu _k[/tex] ≈ 1.304 × 10⁻⁵

Answer:

The hypocenter is the point within the earth where an earthquake rupture starts. The epicenter is the point directly above it at the surface of the Earth. Also commonly termed the focus.

Explanation:

Answer:

203.1J

Explanation:

Given parameters:

Mass  = 65kg

Speed  = 2.5m/s

Unknown:

Kinetic energy of jogger  = ?

Solution:

To solve this problem, we use the kinetic energy equation:

    K.E  = [tex]\frac{1}{2}[/tex] m v²  

m is the mass

v is the velocity

 Now insert  the parameters and solve;

  K.E  =  [tex]\frac{1}{2}[/tex] x 65 x 2.5²   = 203.1J

Answer:

D

Explanation:

It's quite simple actually, you see, what light years basically means is how many years light takes to travel from point a to point b. So here it says that a galaxy is 200 million light years away. So since that light is 200 million years away, it would take 200 million years until that light reaches us.

Answer:

The atomic number of Aluminum is "13"!

Explanation:

The 27 means the atomic mass is 27 . The number of protons plus the number of neutrons is 27. That means the number of neutrons is 27–13=14. Number of neutrons depends on the isotopic form of aluminium.

Answer:

42 °

Explanation:

From the question given above, the following data were obtained:

Force (F) = 45 N

Workdone (Wd) = 50 J

Distance (d) = 1.5 m

Angle (θ) =.?

Angle at which the box is pulled can be obtained as:

Wd = Fd × Cos θ

50 = 45 × 1.5 × Cos θ

50 = 67.5 × Cos θ

Divide both side by 67.5

Cos θ = 50 / 67.5

Cos θ = 0.7407

Take the inverse of Cos

θ = Cos¯¹ 0.7407

θ = 42.2 ≈ 42 °

Thus, the angle at which the box is pulled is approximately 42 °.

9514 1404 393

Answer:

  63.4 °C

Explanation:

If we assume the "fixed points" are 0 °C and 100 °C, then the thermometer reading as a function of actual temperature can be described by a linear equation that must have (0, -0.5) and (100, 106) as solutions. We can use these points in the 2-point form of the equation for a line:

  y = (y2 -y1)/(x2 -x1)(x -x1) +y1

  y = (106 -(-0.5))/(100 -0)(x -0) -0.5

  y = 106.5x -0.5

Then, for x = 60, the thermometer reading is expected to be ...

  y = 106.5×60 -0.5 = 63.4 . . . °C

Answer:

Here you go! Hope it Helps

Explanation:

mixer, nuts, bolts, washers

and

rusted nails

Answer:

The Correct answer is rusted nails and pastries

Explanation:

I know because I had this as one of my questions and I did rusted nails and pastries and got it correct.

Hope this helps! :)

Answer:

false bcz neutrons do not move they r fixed in nucleus so it will. Fallse

Answer:

320,000J

Explanation:

mass=320,000J

Answer:

C. Talk test

Explanation:

The talk test would be readily available to me at the the least cost.

The talk test is about the easiest way that one can monitor intensity as they exercise. Because the only thing needed here is the ability to talk and to breathe.

The intensity lies on if one can talk and breathe at the same time. The harder one exercises, the more breathless they become and they find it difficult to talk.

Answer:

c

Explanation:

Answer:

A

Explanation:

ap3x

Answer:

A. Refraction

Explanation:

<3

Answer:

Nuclear energy

Explanation:

The nucleus holds the energy together

Answer:

The bending occurs because light travels more slowly in a denser medium.

Answer:

In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

Explanation:

Answer:

D

Explanation:

i did that yesterday and your welcome homie b

Hello!

Use ohm law:

I = V / R

Replacing:

I = 100 V / 20 O

I = 5 A

The current is 5 amperes.

Answer:

3.

Explanation:

If the astronaut in the video wanted to move upward, he should throw the object downward because according to Newton’s third law, the object will then exert a force on him in the opposite direction (i.e., upward). hence, option (3) is correct.

Newton's Third Law states that if object A exerts a force on object B, then object B must apply a force to object A that is equal in magnitude and directed in the opposite direction.

This law represents a specific symmetry in nature: forces always exist in pairs, and no body can exert a force without also being subjected to one.

Hence, if the astronaut in the video wanted to move upward, he should throw the object downward and  the object will then exert a force on him in the opposite direction (i.e., upward).

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[tex]\mathsf{what ~is~ a ~projectile ~motion??   }[/tex] 

[tex]\large \underbrace{ \underline{ \sf projectile \: motion }}[/tex]