Answers
Answer:
C = 1.01
Explanation:
Given that,
Mass, m = 75 kg
The terminal velocity of the mass, [tex]v_t=60\ m/s[/tex]
Area of cross section, [tex]A=0.33\ m^2[/tex]
We need to find the drag coefficient. At terminal velocity, the weight is balanced by the drag on the object. So,
R = W
or
[tex]\dfrac{1}{2}\rho CAv_t^2=mg[/tex]
Where
[tex]\rho[/tex] is the density of air = 1.225 kg/m³
C is drag coefficient
So,
[tex]C=\dfrac{2mg}{\rho Av_t^2}\\\\C=\dfrac{2\times 75\times 9.8}{1.225\times 0.33\times (60)^2}\\\\C=1.01[/tex]
So, the drag coefficient is 1.01.
Related Questions
how does a hammer gives force to a hot iron when we hit it to make a weapon
Answers
why would you want to know the speed of an object
Answers
Answer:
Because when something is moving such as a car if your going too fast there could be a crash or collision.
Explanation:
2
Which statement can be made about the amplitude of any transverse wave?
Answers
Answer:
It is the length from the midpoint to the crest.
Explanation:
WILL GIVE BRAINLY TO CORRECT ANSWER
Answers
the second and third one
summarize the key discoveries that have shaped the development of atomic models.
Answers
Calculate the acceleration of a car in m/s that can go from rest to 28 m/s in 10 seconds.
Answers
Answer:
a = 2.8 m/s2
Explanation:
a = Δv ÷ Δt
a = 28 ÷ 10
a = 2.8 m/s2
You are training to run the 100 m race at a track and field meet.You time yourself and find you can run it in 10 seconds. How fast are you abke to run it
Answers
Answer:
[tex]10\ \text{m/s}[/tex]
Explanation:
[tex]s[/tex] = Displacement = [tex]100\ \text{m}[/tex]
[tex]t[/tex] = Time taken = [tex]10\ \text{s}[/tex]
Velocity is given by
[tex]v=\dfrac{s}{t}\\\Rightarrow v=\dfrac{100}{10}\\\Rightarrow v=10\ \text{m/s}[/tex]
The person is able to run at a speed of [tex]10\ \text{m/s}[/tex] in order to complete the race in the given time.
Calculate the speed of a dolphin that is observed swimming 75 meters in 5.0 seconds.
Answers
Answer:
15 meters/second
Explanation:
You skip north for 12 minutes to your best friend's house that is 1.5 kilometers away. What is your average velocity?
Answers
Answer:
The average velocity is 7.5 km/h
Explanation:
Were Gonna convert minutes to hours
12 minutes = 12/60 hours = 0.2 hours
Now we estimate the average velocity of the distance traveled over this time
1.5 / 0.2 km/h = 7.5 km/h
please help me !!!!!!
Answers
Answer:
the correct answer to your problem I believe would be B
A wave can travel through a solid, liquid or gas or no matter at all
True or false?
Answers
Waves carry energy through empty space or through a medium without transporting matter. While all waves can transmit energy through a medium, certain waves can also transmit energy through empty space. A medium is a material through which waves can travel. It can be a solid, liquid, or gas.
Hope this helps pls mark me brainliest
discuss how changes in Earth's surface characteristics and/or atmospheric composition could contribute to global warming or cooling.
Please help me answer this, I'm so clueless!
Answers
Answer:
More carbon dioxide or greenhouse gases in the atmosphere can lead to global warming. Oceans store a large amount of heat, and increases in sea surface temperature can increases the amount of water vapor over the oceans, and that will increases the amount of greenhouse gases.
A collector of rare items is negotiating with a museum. He wants to sell a spear he claims to have been
used to kill a mammoth over 11,000 years ago. A spear that size would have started with around 4g of
Carbon-14, and the museum tests show it now contains around 2g. How many half-lives have passed since the spear was carved?
Answers
Answer:
I'm not sure if you maybe forgot to add in some information but I can give you the equation you will need to solve this..! (just without the bit of infomration you might need)
[tex]2=4(\frac{1}{2})^{\frac{1100}{t}}[/tex]
In this case you'll be solving for t and I can help you with your first step, you'll divide 2 by 4, getting you to:
[tex]\frac{1}{2} =\frac{1}{2}^{\frac{1100}{t}[/tex]
Answer:
1 as 2g is half of 4g
Explanation: that means that the spear is closer to 6k years old
Why does the Ring of Fire have SO MUCH earthquake/volcanic activity?
It is closer to the center of the Earth.
More people live here.
There is a lot of plate movement)
HELP ME PLS AM IN A TEST I BEG YOU PLS
Answers
Answer:
Many volcanoes in the Ring of Fire were created through a process of subduction. And most of the planet's subduction zones happen to be located in the Ring of Fire. Subduction happens when tectonic plates shift, and one plate is shoved under another.
Explanation:
If you had a accident and could no longer speak what part of your brain might of been damaged?
Answers
Answer:
Thus, damage to the right side of the brain may cause movement problems or weakness on the body's left side. For most people, the left half of the brain is responsible for verbal and logical functions including language (listening, reading, speaking, and writing), thought and memory involving words.Explanation:
Carry on learning
Every force applied to an object will cause the object to move.
Answers
Answer:
Yes your correct.
Explanation:
How many types of ion are formed when water splits during
electrolysis?
1
2
5
3
4.
Answers
Answer:
Explanation:
Electrolysis of dissolved ionic compounds
An electrolyte formed by dissolving an ionic compound contains: hydrogen ions from the water, and positive ions from the compound. hydroxide ions from the water, and negative ions from the compound.
the answer is 4
PLEASE HURRYYY!!
Find the momentum of a 3.0kg mass when it is stopped
Answers
Answer:
there is no momentum
Explanation:
When the net force on an object is zero, the object's motion will:
Answers
Explanation:
Newton's first law of motion that every object will continue in its state of rest or uniform motion in a straight line unless a resultant force acts on it.
this law means that if the resultant force is zero,
so the object will do either of those things.
hope it helps, if not, please report it so that someone else gets to try .
please vote if found helpful
the velocity of sound apparatus is used in an investigation to determine the frequency of an unknown tuning fork. The temperature of the room is 25° Celsius, the first antinode is at .75meters with the second position at 2.25.
A. Determine the wavelength of the tuning fork.
B. Determine the speed of sound in that room.
C. Determine the frequency of the tuning fork.
Answers
Answer:
Explanation:
The relationship of the speed of sound, its frequency, and wavelength is the same as for all waves: vw = fλ, where vw is the speed of sound, f is its frequency, and λ is its wavelength.
El espectro visible en el aire está comprendido entre la longitud de onda 450 nm del color azul, Determina la velocidad de propagación.
Answers
Answer:
v = 2,99913 10⁸ m / s
Explanation:
The velocity of propagation of a wave is
v = λ f
in the case of an electromagnetic wave in a vacuum the speed that speed of light
v = c
When the wave reaches a material medium, it is transmitted through a resonant type process, whereby the molecules of the medium vibrate at the same frequency as the wave, as the speed of the wave decreases the only way that they remain the relationship is that the donut length changes in the material medium
λ = λ₀ / n
where n is the index of refraction of the material medium.
Therefore the expression is
v = [tex]\frac{\lambda_o}{n} f[/tex]
Let's look for the frequency of blue light in a vacuum
f =[tex]\frac{c }{\lambda_o}[/tex]
f = [tex]\frac{3 \ 10^8}{450 \ 10^{-9}}[/tex]
f = 6.667 10¹⁴ Hz
the refractive index of air is tabulated
n = 1,00029
let's calculate
v = [tex]\frac{450 \ 10^{-9} }{1.00029} \ 6.667 \ 10^{14}[/tex]450 10-9 / 1,00029 6,667 1014
v = 2,99913 10⁸ m / s
we can see that the decrease in speed is very small
A wave travels at 344 m/s and has a wavelength of 0.35 m. Its frequency is closest to what?
Answers
It's closest to 982.9 Hz.
What is the speed of a wave that has a wavelength of 2 m and a frequency of 1.5 hz? Show your calculations!
Answers
Answer:
3 m\s Ans .....
Explanation:
Solution:
v = (1.5)(2)
v = 3 m\s Ans ........
what is the gain in gpe when a brick of 2.00 kg is lifted up by 11.5 m
Answers
Explanation:
the question is not clear
Which waves have oscillations parallel to their direction of motion
Answers
Answer:
The direction of these oscillations is the difference between longitudinal or transverse waves. In longitudinal waves, the vibrations are parallel to the direction of wave travel. In transverse waves, the vibrations are at right angles to the direction of wave travel.
Explanation:
The waves that contains the oscillations parallel to their direction of motion should be considered as the sound waves from stereo speaker.
What are sound waves?A sound wave is the wave that shows the disturbance patterns that should be lead by the movement of the energy that should be travelled via the medium like air, water, since it should be propagated away from the sound source.
Therefore, The waves that contains the oscillations parallel to their direction of motion should be considered as the sound waves from stereo speaker.
Learn more about wave here: https://brainly.com/question/18752605
1. The electromagnetic waves described in the reading are different in which two ways:
frequency and amplitude
B wavelength and frequency
wavelength and crests
D frequency and velocity
arting would require a stopwatch to measure?
Answers
Answer:
D is the answer
Explanation:
But do u know if im right test it out then surprise
The electromagnetic waves described in the reading are different in two ways, and that is Frequency and velocity. Hence, option D is correct.
What are electromagnetic waves?A magnetic field and an electric field vibrate together to produce electromagnetic waves, often known as EM waves. In other terms, magnetic and electric fields that are oscillating make up electromagnetic waves (EM).
When a magnetic field and an electric field interact, electromagnetic waves are created. The term "electromagnetic waves" is used to describe them. An electromagnetic wave has an electric field and a magnetic field that are perpendicular to one another. They are likewise perpendicular to the EM wave's direction.
The wavelength and frequency of electromagnetic waves vary. Electromagnetic waves with longer wavelengths have lower frequencies, whereas those with shorter wavelengths have higher frequencies. Waves at higher frequencies carry more power. A wave's wavelength and frequency together determine its speed.
To get more information about electromagnetic waves :
https://brainly.com/question/3101711
#SPJ2
Which explanation BEST supports Newtons second law of motion
Answers
Answer:
c
Explanation:
because newton's second law states that F= MA
which suggests that if M increases, F also increases which is the force,
let me give you a tip, during exam, just type any random numbers into the formula, like at first you type 5 into the M, then increase M, by putting 10 into the M , keep the acceleration the same for this, okay?
you will see that the force will increase,
by this I mean that option says largest mass, so the force will also be very big because in reality do you use more force on heavier box or a lighter one to push it across the room?
so larger mass, larger force, greater acceleration
but the question is not being clear, whether to the force remains constant for every object, if it does then A is false . and B is false because if the forces is constant, and it is light, it would require a small amount of force ,
but the other options, gave us a clue about the force so you can choose either c or d but see the explanation above,
the only corrext option will be c.
if not, please report this, someone will have a go at it
:) byeee
How do I get my Ollie higher??? I can do an Ollie well but I can’t get any height it only goes about 3 inches in the air. Any tips?
Answers
when you’re trying to ollie higher, your front foot will be slightly farther back than it normally is. this lets you drag more on the board, helping you get the height you need. hope this helped :)
Answer: I had the same problem if I was you I would use my phone and record a slowdown of your ollie. Also pop hard and focus on how much you jump, your ollie is only going to go as high as you jump so try to get some Hight also do moving first it helps in the long run trust if you dont its just as hard as learning how to ollie in the first place.
Explanation: keep riding I hope the best
The pathway that electricity flows through is called a circuit.
a. true
b. false
Answers
Answer:
True
Explanation:
If you took the same amount (the exact same volume), of a piece of crust and compared it to a piece of the core, which one would be heavier for its size? Why?
Answers
Answer:
The answer is below
Explanation:
Density is the amount of matter contained in a certain space. Objects that are dense are very heavy compared to their size while objects that are not dense are very light compared their size. Therefore most dense objects sink when placed in water while less dense objects floats in water.
Density is the ratio of mass to volume. It is given by:
Density = mass / volume
Crust has a density of 2.2 - 2.9 g/cm³ while core has a density of 9.9 - 12.2 g/cm³ for its outer and 12.8 - 13.1 g/cm³ for its inner.
Therefore if the same amount of a piece of crust is compared to a piece of core, the core would be more heavier since it has more density than the crust.