What is the period of a wave that has a wavelength of 1 meter and a speed of 20 m/s?
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".
Period of the WaveThe wave speed is given in terms of wave frequency and wavelength as follows:
[tex]v=f\lambda\\\\f=\frac{v}{\lambda}[/tex]
where,
v = wave speed = 20 m/sλ = wavelength = 1 mf = frequency of wave = ?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
Learn more about wavelength here:
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can i get sum help ........................
b. Find the centripetal force needed to keep an 60.0 kg rider traveling in a circle in the ride.
Given:
m =
v = (from part a)
r=
Unknown:
F=?
Equation:
F= m (v^2) / r
Answer:
loloololo
lol
Explanation:
lolloolololo
Air is made up of gas particles. These particles exert pressure on every object they collide against. This pressure is known as air pressure. Which of the following statements about air pressure is true?
A.
Warm air tends to have a higher air pressure than cold air.
B.
Air pressure decreases as altitude increases.
C.
The atmosphere's air pressure does not vary.
D.
Air pressure increases as altitude increases.
plz answer CORRECTLY and don't delete or report bc ppl keep doing that to me...
THANKS FOR THE HELP!!!!
Answer:
I think the anwser is b
Explanation:
because as altitude increase pressure therefore decreases
what is the significance of the similar number and arrangement of bones in human arm and a bat wing
How many protons does Aluminum have?
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.
Which of the following is a measurement of acceleration?
O 33 km/h^2
O 20 m/s
O 300 m/s north
O 780 m/s^2 north
Answer:
D
Explanation:
i did that yesterday and your welcome homie b
a car’s gas tank contains 58.7 kg of gasoline, which takes up 0.0814 m^3 of volume. what is the density of the gasoline?
unit = kg/m^3
Answer: 721.13
Explanation:
The density of the gasoline will be "721.13 kg/m²". To understand the calculation, check below.
Density and VolumeAccording 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.
Find out more information about volume here:
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Phyllis is calculating the path of a space probe that will travel to Pluto. On the way to Pluto, the probe will pass Mars, Saturn, Jupiter, and Neptune.
Which of those planets exerts the greatest gravitational force?
Mars
Saturn
Jupiter
Neptune
Answer:
Jupiter
Explanation:
Answer:
jupiter
Explanation:
biggest planet strongest gravitational force
If the astronaut in the video wanted to move upward, in which direction should he throw the object? Why?
1.He should throw the object upward because according to Newton’s third law, the object will then exert a force on him in the same direction (i.e., upward).
2.He should throw the object upward because according to Newton’s third law, the object will then exert a force on him in the opposite direction (i.e., downward).
3.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).
4.He should throw the object downward because according to Newton’s third law, the object will then exert a force on him in the same direction (i.e., downward).
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.
What is Newton's third law of motion?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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What is the kinetic energy of a jogger with a mass of 65.0 kg traveling at a speed of 2.5m/s
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
In the picture to the right, find the angle at which
the box is pulled if the work done is 50J
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 °.
A box is sliding on a rough patch of ice, and the only horizontal force acting on it is friction. You observe that it slides to a stop in 600 seconds over a distance of 23 meters. What magnitude coefficient of kinetic friction between the box and the ice?
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
Which shows increasing entropy?
mowing a lawn
folding clothes
falling leaves
washing dishes
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.
Mowing a lawn is a typical example of increasing entropy. When a lawn is being mowed, the grasses becomes disordered without any fixed orientation. Folding a clothe is trying to bring orderliness to the clothe patterning. Washing dishes will make one arrange them in an ordered way. Falling leaves brings leaves together.Answer:
Falling leaves!
Explanation:
I got it right on EDGE2021. ^^ Hope it helps!~ Remember, I'm proud of you. <3
plzzzzz helppppp plzzzzzzzzzzzzzzzzzzzzzzz
What happens when a wave enters a different material and slows down?
o
A. Refraction
o
B. Transmission
o
C. Reflection
D. AbsorptionWhat happens when a wave enters a different material and slows down?
o
A. Refraction
o
B. Transmission
o
C. Reflection
D. Absorption
Answer:
A
Explanation:
ap3x
Answer:
A. Refraction
Explanation:
<3
Given two magnets, in which position will they attract? In which position will they repel?
Answer:
They will attract when its north and south but will repel when its south and south or north and north
What type of energy is stored in the nucleus of an atom?
Answer:
Nuclear energy
Explanation:
The nucleus holds the energy together
The Electron Cloud Model shows shaded regions of probabilty where the electons most likely are at a given point in time. True False
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:
If a galaxy is located 200 million light years from Earth, what can you conclude about
the light from that galaxy?
A. The light will travel a total of 200 million kilometers to reach Earth.
B. The light will travel 200 million kilometers per second to reach Earth.
C. The light will travel a total of 300,000 kilometers to reach Earth.
D. The light will take 200 million years to reach Earth.
please help :(
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.
PLEASE HELP !!!! Calculate the gravitational force between two objects when they are 0.850m apart. Each object has a mass of 6.00kg.
1. 2.96 x 10^-7
2. 2.22 x 10 ^-9
3. 3.3x10^-9N
4. 2.23x10^-8N
Need answer ASAP!!!
Will give the brainliest for the correct answer!!!
What is the current of a circuit it the resistance is 20 ohms and the voltage is 100 V?
Hello!
Use ohm law:
I = V / R
Replacing:
I = 100 V / 20 O
I = 5 A
The current is 5 amperes.
How is the 3rd law different from the 1st and 2nd laws?
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:
Select the correct images. Which images show chemical reactions?
Melting ice
mixer, nuts, bolts, washers
rusted nails
pastries
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! :)
What is the difference between epicenter and focus?
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:
The sun has a mass of 1.99 x 10-30 kg. Saturn has a
mass of 5.68 x 10^26 kg. The distance between the sun
and Saturn is 1.43 x 10^12 m. Calculate the gravitational
force between the sun and Saturn.
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]
Two cars bump going the same direction and stick together. Car A has a mass of 1000kg car B has a mass of 2000kg. What the speed of the cars after the collision?
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
why does of beam of light ben when it passes into a new medium?
Answer:
The bending occurs because light travels more slowly in a denser medium.
Hi I need help with this question (see image ). Please show workings if necessary.
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
what is projectile motion
[tex]\mathsf{what ~is~ a ~projectile ~motion?? }[/tex]
Answer:[tex]\large \underbrace{ \underline{ \sf projectile \: motion }}[/tex]
Projectile motion is when an object moves in a bilaterally symmetrical, parabolic path. The path that the object follows is called its trajectory. Projectile motion only occurs when there is one force applied at the beginning, after which the only influence on the trajectory is that of gravity.Some examples of Projectile Motion are Football, A baseball, A cricket ball, or any other object. The projectile motion is always in the form of a parabola which is represented as:[tex]\dashrightarrow\bold{y = ax + bx {}^{2}}[/tex]In the middle of your Fitness drug you start to feel a little weak selective method of monitoring your Fitness level which would be readily available to you at the least cost: A. Heart rate monitor B. Pedometer C. Talk test D. Stopwatch
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: