Answer:
69 revolutions
Explanation:
given,
initial angular velocity = 0
final angular velocity = 6 rev/s
when safety switch turned off
tub smoothly slows to rest in (t)= 13 s
total revolution of tub = ?
angular acceleration =
angular acceleration =
= 0.6 rev/s²
now,
= 30 revolution
now,
when safety switch turn off
angular acceleration =
angular acceleration =
= -0.462 rev/s²
now,
= 39 revolution
total revolution = 30 + 39 = 69 revolutions.
tub will rotate 69 revolutions
Answer:
(a):
(b):
(c):
Explanation:
Given that an electron revolves around the hydrogen atom in a circular orbit of radius r = 0.053 nm = 0.053 m.
Part (a):
According to Coulomb's law, the magnitude of the electrostatic force of interaction between two charged particles of charges and respectively is given by
where,
- = Coulomb's constant =
- = distance of separation between the charges.
For the given system,
The Hydrogen atom consists of a single proton, therefore, the charge on the Hydrogen atom,
The charge on the electron,
These two are separated by the distance,
Thus, the magnitude of the electrostatic force of attraction between the electron and the proton is given by
Part (b):
The gravitational force of attraction between two objects of masses and respectively is given by
where,
- = Universal Gravitational constant =
- = distance of separation between the masses.
For the given system,
The mass of proton,
The mass of the electron,
Distance between the two,
Thus, the magnitude of the gravitational force of attraction between the electron and the proton is given by
The ratio :
True is the correct answer hope this helps
The key variable that different the two type of jumps is direction of motion.
<h3>
High Jump</h3>
A high jump involves vertical upward upward motion that is limited by gravity.
The maximum height reached during a high jump is given as;
H = vt - ¹/₂gt²
<h3>Long Jump</h3>
A long jump involves horizontal distance that is not affected by gravity.
The horizontal distance traveled during a long jump is given as;
H = vt
Thus, the key variable that different the two type of jumps is direction of motion.
Learn more about direction of motion here: brainly.com/question/1674237
Answer:
4441 J
Explanation:
The amount of energy needed to change the ethyl alcohol from liquid to gas state is given by
where
m = 5.20 g is the mass of the alcohol
is the latent heat of vaporization of the substance
Substituting the numbers into the formula, we find: