A 30cm diameter wheel rotates with a constant angular acceleration of 2.00 rad/s2. It starts from rest at t = 0, and a chalk line drawn to a point, P, on the rim of the wheel makes an angle of 37.1° with the horizontal at this time. At t = 2.00 s, find (a) the angular speed of the wheel (b) the linear velocity and tangential acceleration of P
Answers
Answer:
a) 4.00 rad/s
b) 0.6 m/s, 0.3 m/s²
Explanation:
Given:
ω₀ = 0 rad/s
α = 2.00 rad/s²
t = 2.00 s
Find:
a) ω
b) v, a
a) ω = αt + ω₀
ω = (2.00 rad/s²) (2.00 s) + (0 rad/s)
ω = 4.00 rad/s
b) v = ωr
v = (4.00 rad/s) (0.15 m)
v = 0.6 m/s
a = αr
a = (2.00 rad/s²) (0.15 m)
a = 0.3 m/s²
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1. An isotope has the same ________, but a different ________ .Question 1 options: number of protons, number of electrons number of neutrons, number of protons Mass number, number of protons. Atomic number and Mass number 2.U-232 U-235 U-236 U-238 These nuclei all have a different number of Question 2 options: Electrons Neutrons Protons Nucli Identify the number of neutrons in one atom of sulfur with an isotopic mass number of 34 amu. Question 3 options: 16 18 32 34 3.Identify the number of neutrons in one atom of sulfur with an isotopic mass number of 34 amu. Question 3 options: 16 18 32 34
Answers
Answer:
4. has a symmetrical charge distribution
Explanation:
Symmetrical charge distribution in molecules results in the formation non-polar molecules.
For a symmetrical distribution of charge to occur, there must be a sort of sharing of electrons between two atoms. In the case where electrons are transferred, there won't be any need to distribute charges.
When electrons are shared between atoms with similar likeness for the electron, none of the two atoms pulls the electrons more to itself. The electrons are shared evenly and symmetrically between the two atoms. This leaves no charge separation on any of the atom. Therefore, the dipoles in one direction cancels out the dipoles in another direction and this leaves no charge.
This makes the molecule non-polar.
Answer:
has a symmetrical charge distribution
Explanation:
A symmetrical charge distribution means the atoms have the same electronegativity or they are a molecule with the same atoms in a regular pattern around the center is in CH4, identical along a central line.
B. Temperature
C. Acceleration
D. Force
Answers
Answer:
A. Energy
Explanation:
You can change energy from one form to another when you lift your arm or take a step. Energy is used to move matter. In this scenario, the matter would be you.
Answers
Answer:
6J
Explanation:
jus took the test :)
c. Atomic number
b. Molar mass
d. Avogadro’s number
Answers
You would convert from grams to moles by using the molar mass of the substance. The answer is letter B. for example, the molar mass Carbon dioxide is 44.01 g/mol. It means that for 1 mole of carbon dioxide, it contains 44.01 grams of Carbon dioxide.
(b) Red
(c) Green
(d) Violet
Answers
The color which is displaced the most will be "Violet".
Refractive index
According to the question,
Indices of refraction,
Red, = 1.520
Green, = 1.526
Violet, = 1.538
The higher the refractive index of something like a wavelength, the generally greater the departure from the glass's surfaces or ground. The emerging ray always seems to be perpendicular towards the incident light.
You now understand something the greater more deviation somewhere at this same surface of the object, the greater the laterally or sideways displacement.
Thus the response above i.e., "Option d" is correct.
Find out more information about refractive index here:
Answer:
(d) Violet
Explanation:
The formula for lateral displacement = t sin ( i - r ) / cos r
where t is thickness of slab , i is angle of incidence , r is angle of refraction
refractive index = sin i / sin r
if refractive index is high , for given i , angle of r will be less
i - r will be more , hence sin( i - r ) will be more
cos r will be less ( larger the angle , lesser will be its cos value )
sin( i - r ) / cos r will be more
lateral displacement will be more .
hence higher refractive index results into greater displacement .
So violet ray will undergo maximum displacement .
Answers
Answer:
You just need to use:W=Fd Where W is work done, F is force, d is distance. Units of work will be Nm
Explanation: