Answer:
w = 1,662 rad / s, v = 33.25 m / s
Explanation:
This this exercise indicates that the acceleration felt by the astronauts is
a = 5.64 g
in a circular motion the centripetal acceleration is
a_c = v²/ r
angular and linear variables are related
v = w r
we substitute
a_c = w² r
we finally have
5.64 g = w² r
w² = 5.64 g / r
let's calculate
w = [tex]\sqrt{ \frac{5.64 \ 9.8}{20.0} }[/tex]
w = 1,662 rad / s
linear velocity is
v = w r
v = 1,662 20
v = 33.25 m / s
What is meant by uniform motion ? Write with an example.
Answer:
This type of motion is defined as the motion of an object in which the object travels in a straight line and its velocity remains constant along that line as it covers equal distances in equal intervals of time, irrespective of the duration of the time.
Explanation:
In Physics, uniform motion is defined as the motion, wherein the velocity of the body travelling in a straight line remains the same. When the distance travelled by a moving thing, is same at several time intervals, regardless of the time length, the motion is said to be uniform motion.
A car travels 140 miles in 3 hours. What is its velocity?
Answer:
46.67 miles/s
Explanation:
...........
मारवतन गनुहास (What Is MKS Syste
Convert 5 solar days into second.)
Answer:
5 Days to Seconds = 432000
Explanation:
A spring of spring constant 30.0 N/m is attached to a 2.3 kg mass and set in motion. What is the period and frequency of vibration for the 2.3 kg mass?
Answer:
1. The period is 1.74 s.
2. The frequency is 0.57 Hz
Explanation:
1. Determination of the the period.
Spring constant (K) = 30 N/m
Mass (m) = 2.3 Kg
Pi (π) = 3.14
Period (T) =?
The period of the vibration can be obtained as follow:
T = 2π√(m/K)
T = 2 × 3.14 × √(2.3 / 30)
T = 6.28 × √(2.3 / 30)
T = 1.74 s
Thus, the period of the vibration is 1.74 s.
2. Determination of the frequency.
Period (T) = 1.74 s
Frequency (f) =?
The frequency of the vibration can be obtained as follow:
f = 1/T
f = 1/1.74
f = 0.57 Hz
Thus, the frequency of the vibration is 0.57 Hz
The period of the vibration is 1.76 s and the frequency of the vibration is 0.57 s-1.
Using the formula;
T = 2π√(m/K)
Where;
T = period
m = mass
K = spring constant
Substituting values;
T = 2(3.142)√2.3/30
T = 6.284 × 0.28
T = 1.76 s
Recall that the period is the inverse of frequency;
f = 1/T
f = 1/1.76 s
f = 0.57 s-1
Learn more about spring constant: https://brainly.com/question/4291098
¿Cuáles de las siguientes cualidades permiten identificar un cuerpo como planeta? I) Debe ser aproximadamente esférico. II) Debe girar en torno a una estrella. III) Su velocidad debe ser constante.
Answer:
The correct answer is ii) It must revolve around a star
Explanation:
For a celestial body to be called a planet, it must meet at least three characteristics
* rotate around a star
* its mass must be sufficient to maintain hydrostatic equilibrium
* have control over its orbital that is to say to prevent that other body is in its same orbital
if we check the different proportions
i) False. Most of the planets are spheres deformed by their rotation on themselves and around the star
ii) True. It is in accordance with the minimum characteristics of the plants
iii) False .. the orbit of the planet can be elliptical and the speed changes at each point for this at a different distance from the star that is in a focus of the ellipse.
The correct answer is ii) It must revolve around a star
POR FAVOR AYUDENME A RESOLVER ESTO:
Halla el coeficiente de dilatación lineal de una varilla que a 10 grados centígrados mide 125 metros y cuya longitud a 85 grados centígrados es 125.20 m. ¿De qué material será?
Answer:
α = 2.13 10⁻⁵ C⁻¹ , the closest material is ALUMINUM
Explanation:
The expression for thermal expansion is
ΔL = α L₀ ΔT
temperatures are
ΔT = 85 - 10 = 75 ° C
the length of the rod is L₀ = 125 m and L_f = 125.20 m
ΔL = 125.20 - 125 = 0.20 m
α = [tex]\frac{1}{L_o} \frac{\Delta L }{\Delta T}[/tex]
α = [tex]\frac{ 1}{125} \ \frac{0.20 }{75}[/tex]
α = 2.13 10⁻⁵ C⁻¹
When reviewing the table, the closest material is ALUMINUM
If water is flowing in a 1-inch diameter pipe with an average velocity of 3 m/s and the wall roughness is 400 microns, calculate the wall shear stress.
Answer:
Shear stress is 50.63 Pascal
Explanation:
As we know shear stress = [tex]\frac{\rho V^2 f}{8} \\[/tex]
Rho is the density
V is the velocity
f is the value from Moody's chart
We will know determine Reynolds number to determine the flow type and then the f value
[tex]R_e = \frac{ \rho*V*D}{u}[/tex]
[tex]R_e = \frac{1000*3*0.0254}{0.001} = 76200[/tex]
This is a turbulent flow and hence the roughness index is [tex]\frac{E}{D} = 0.0157[/tex], From this we get f = 0.045
Now shear stress = [tex]\frac{1000 * 3^2 * 0.045}{8} = 50.63[/tex] Pa
Which two things might an object do when there are no forces acting on it?
Answer:
for one they will stay there. And another thing it will do is collect rust pretty much destroying it.
Explanation:
The smallest molecules are made up of -
a. 1 atom
b. 2 atoms
c. 3 atoms
The largest molecules are made up of -
a. billions
b. millions
c. hundreds
d. thousands
- of atoms.
A 20 kg child is traveling 3 m/s on an amusement park ride. What is the magnitude of the child’s momentum?
Answer:
[tex]\frac{60kgm}{s}[/tex]
Explanation:
momentum = mass * velocity
= 20kg * 3m/s
= 60kgm/s
Please answer correctly
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The device shown below contains 2 kg of water. When the cylinder is allowed to fall 250 m, the temperature of the water increases by 1.4°C. Suppose 2 kg of water are added to the container and the cylinder is allowed to fall 750 m. What would the increase in temperature be in this case? Gizmo image A. 0.7°C B. 1.4°C C. 2.1°C D. 2.8°C
Answer:c. 2.1°C
Explanation:
I just did it
describe atmospheric pressure and water pressure
Answer:
The difference is that water is an incompressible fluid — its density is almost constant as the pressure changes — while air is a compressible fluid — its density changes with pressure. ... Atmospheric pressure is the pressure exerted on a surface by the weight of the atmosphere (a compressible fluid) above it
Explanation:
change some words
The left end of a spring is attached to a wall. When Bob pulls on the right end with a 200 N force, he stretches the spring by 20 cm. The same spring is then used for a tug-of-war between Bob and Carlos. Each pulls on his end of the spring with a 200 N force. How far does the spring stretch
Answer:
40 cm
Explanation:
Since Bob pulls with a force of F = 200 N when the spring is attached to the wall and it extends a length x = 20 cm, from Hooke's law,
F = kx where k = spring constant
So, k = F/x = 200 N/20 cm = 10 N/cm
Now, sine both Bob and Carlos pull with a force of F = 200 N in opposite directions, the spring stretches about its center and has an extension, x' in each direction.
So, from F = kx
x = F/k = 200 N/10 N/cm = 20 cm
So, the spring stretches 20 cm in both directions.
So, the total extension is thus x' + x' = 2x' = 2(20 cm) = 40 cm
The spring will stretch 40 cm.When a force is act om the spring the spring will stretch or compress depeds on the application of force.
What is hooke's law?Hooke's law states that the force used to extend the spring is directly equal to the amount of stretch.
The force needed to extend the spring is proportional to its displacement. It is stated as
F=Kx
The given data in the problem is;
F is the force of pull to bob= 200 N
x is the length of extension= 20 cm.
F' is the force act on the another end= 200 N
According to Hooke's law,
[tex]\rm F = Kx \\\\ \rm K= \frac{F}{x} \\\\ \rm K= \frac{200}{20} \\\\ \rm K=10 \ N/cm[/tex]
The extension due to another end force is found by;
[tex]\rm x' = \frac{F}{K} \\\\ \rm x' = \frac{200}{10} \\\\ \rm x' = 20[/tex]
The total extension of the spring will be;
[tex]\rm x_t = x+x' \\\\ \rm x_t = 2(20) \\\\ \rm x_t =40\ cm[/tex]
Hence the spring will stretch 40 cm.
To learn more about the hooke's law refer to the link;
https://brainly.com/question/13348278
If there is a ball sitting on top of a hill with 100J of GPE. How much KE should there be at the bottom of the hill if there is no friction?
Imagine that there is no friction for a day .Make a list if things that it would not be possible for you do.Which things would still be possible
Answer:
1. We cannot walk .
2. We will not get a grip to hold things, then we cannot eat,write,Hold pen or pencil etc.
3. Moving things cannot be stopped.
4.Buildings cannot be constructed.
5. We cannot fix a nail to the wall.
6.We cannot stand properly without a grip.
7.we would keep slipping.
8.Nothing will be steady on ground. , things will not be at a proper places because of no grip.
9.Brakes in the car / vehicles will be useless.
10. Finally all the things, including us will be floating in the air.
Explanation:
Hope that helps
A group of students are doing a reading activity in their classroom. They suddenly hear the noise of a truck in the parking lot of their school. They can hear it but cannot see it. Which of the following explains why they can hear the truck, but cannot see it?
Answer:
The answer is the sound waves can travel through some material (not all) and visible light cannot.
Explanation:
I did this question on study island so I know the answer.
Answer:
the answer is: sound can be transmitted through the walls, but visible light cannot.
Explanation:
) A spring with a spring constant of 2.1N/m is stretched 0.2m. What force is produced by
the spring?
Answer:
Force = 0.42 Newton
Explanation:
Given the following data;
Spring constant, k = 2.1
Extension, e = 0.2m
To find the force, we would use the formula below;
Force = spring constant * extension
Force = 2.1 * 0.2
Force = 0.42 Newton
Light is incident perpendicularly from air onto a liquid film that is on a glass plate. The liquid film is 70.2 nm thick, and the liquid has index of refraction 1.50. The glass has index of refraction 1.40. Calculate the longest visible wavelength (as measured in air) of the light for which there will be totally constructive interference between the rays reflected from the top and bottom surfaces of the film. Assume that the visible spectrum lies between 400 nm and 700 nm.
Answer:
λ₀ = 421.2 10⁻⁹ m
Explanation:
This is an exercise in constructive interference by reflection, let's review some concepts:
* When a ray goes from a medium with a lower index to one with a higher index, it undergoes a phase change of 180º, in this case we have a phase change from the air to the film
* Within the material the wavelength changes according to the spare part index of the material
λₙ = λ₀ / n
By including these two aspects, the constructive interference equation remains
2 n t = (m + ½) λ₀
λ₀ = [tex]\frac{2nt}{m+ \frac{1}{2} }[/tex]
we substitute
λ₀ = 2 1.50 70.2 10⁻⁹ / (m + ½)
let's substitute some values of m
m = 0
λ₀ = [tex]\frac{210.06}{0.5}[/tex] 10⁻⁹
λ₀ = 421.2 10⁻⁹ m
is in the visible range
m = 1
λ₀ = [tex]\frac{210.6}{1+0.5}[/tex] 10⁻⁹
λ₀ = 140.4 10⁻⁹ m
This outside visible range, is ultraviolet light
When two magnets attract, they ___________.
A. Pull together
B. Change color
C. Break
D. Push apart
Answer:
A. Pull together
Explanation:
This is because the two magnets are unlike-poles so they attract to eachother
In which of these can convection not occur
A. Gases
B.solids
C.liquids
D.fluids
I believe the answer would be B.solids.
Explanation:
Hope this helped!
In solids these can convection not occur and convection can occur in both liquids and gases, as they are both considered fluids. Thus, option B is correct.
However, convection cannot occur in solids, as the particles in solids are generally fixed in position and do not have the freedom to move and transfer heat through bulk motion as in convection.
A solid is one of the three fundamental states of matter, along with liquids and gases. It is characterized by having a definite shape and volume. Solids are composed of tightly packed particles, such as atoms, molecules, or ions, that are held together by strong intermolecular forces.
These particles vibrate in fixed positions but do not have the ability to move freely throughout the substance. As a result, solids maintain their shape and volume under normal conditions and exhibit relatively low compressibility compared to gases and liquids. Examples of solids include metals, rocks, wood, plastics, and ice.
Learn more about solid on:
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Name the type of component that has a greater resistance as the current through it increases
Answer:
filament bulb, filament lamp
Explanation:
More length of a wire is a component that has a greater resistance as the current through it increases.
The resistance of a long wire is greater than the resistance of a short wire because electrons collide with more ions present in the wire as they pass through. The moving electrons can collide with the ions present in the metal.
This makes more difficult for the current to flow and causes resistance in the wire so we can conclude that more length of a wire is a component that has greater resistance as more current passes through it.
Learn more: https://brainly.com/question/22706894
A runner starts at position A. He runs 40 m North, 10 m East and 40 m
South. Where does he end up in relation the starting position?
a. 40 m North
b. 40 m South
c. 10 m East
d. Position
What is the relationship between the valence electrons of an atom and the chemical bonds the atom can form?
Answer:
Valence electrons are outer shell electrons with an atom and can participate in the formation of chemical bonds. In single covalent bonds, typically both atoms in the bond contribute one valence electron in order to form a shared pair. The ground state of an atom is the lowest energy state of the atom.
What is number 5?! I’m so confused.
Answer:
i think it's A
Explanation:
Answer:
The answer is A
Explanation:
What is the power of a stereo that has an intensity of 3.5X105 W/m2 at a distance of 12.4 m
_______ are considered to be fluids.
Solids
Liquids only
Gases only
Liquids and gases
Answer:
liquids and gases
Explanation:
Liquids and gases are considered to be fluids because they yield to shearing forces, whereas solids resist them.
What is the wavelength of a sound wave
with a speed of 331 m/s and a frequency
of 500 Hz?
Answer:
0.777m
Explanation:
The sound wave has a wavelength of 0.773m.
Explanation:
To solve this problem we have to use the wave equation that is given below:
We know the frequency and the velocity, both of which have good units. All we have to do is rearrange the equation and solve for
λ :
λ = v f
Let's plug in our given values and see what we get!
λ = 340 m s
440 s − 1
λ = 0.773 m
Hope this helps, Mark as brainliest if u want
The wavelength of the sound wave is 0.662 m.
Explanation:
Given that,
The speed of a sound wave, v = 331 m/s
The frequency of the wave, f = 500 Hz
To find,
The wavelength of the sound wave.
Solution,
The speed of wave in terms of wavelength and frequency is given by :
[tex]v=f\lambda[/tex]
Where
[tex]\lambda[/tex] is the wavelength
Rearranging for [tex]\lambda[/tex],
[tex]\lambda=\dfrac{v}{f}[/tex]
Put all the values,
[tex]\lambda=\dfrac{331}{500}\\\\\lambda=0.662\ m[/tex]
So, the wavelength of the sound wave is 0.662 m.
Reference,
https://brainly.com/question/11957863
A positive point charge is placed at 5 cm from a negatively charged plate.
it is then pulled away from the plate, so it is 10 cm from the plate. Describe
what happened to the potential energy of the charge. (Hint what
happened to the force on the charge more force means more potential
energy) *
Answer: I'm not sure about this one, but you can go to this link to understand it better https://youtu.be/wEQxtUwiV1E.Its a Khan Academy Video Hope This Helps
Explanation:
A tuning fork vibrating in water with a frequency of 840 Hz produces waves that are 2.5 m long. If a tuning fork vibrating at 500 Hz produces the same type of wave in water, what will the wavelength of the waves be?
A) 1.5 m
B) 4.2 m
C) 3.2 m
D) 2.5 m
Answer:
Option B
Explanation:
As we know
Frequency (F) * wavelength (W) = C (speed of light - can also be taken as constant)
Hence,
[tex]F1 W1 = C\\F2W2 = C[/tex]
Or [tex]F1W1 = F2W2[/tex]
Substituting the given values, we get -
[tex]840 *2.5 = 500 *XX = 4.2[/tex] m
Hence, option B is correct
