Answer:

Explanation:
= Refractive index of bubble = 1.33
f = Frequency of light = 
c = Speed of light = 
The wavelength of light is given by

Wavelength is also given by

m = 1 for minimum thickness

The minimum thickness is 
Answer:
7213.7kg/m³
Explanation:
Given parameters:
Volume of the metal chunk = 0.131m³
Mass of the metal chunk = 945kg
Unknown:
Density of the metal chunk = ?
Solution :
To solve this problem, density is the mass per unit volume. It is mathematically expressed as;
Density =
So;
Density =
= 7213.7kg/m³
I did try to solve. I hope it is correct, below is the solution:
<span>put everything in s.i units
then the answer what u wrote is acceleration to get is divide by mass(80)
G=6.011*10^-11
M=6*10^24
R=6.4*10^6
m=80
</span>
Hope it helps.
Answer:
See below
Explanation:
Normal force = m g cos 53 = 8 kg * 9.8 m/s^2 * cos 53 = 47.1823 N
no work is done by this force
Force friction = coeff friction * force normal = .4 * 47.1823 = 7.55 N
work of friction = 7.55 * 2 m = 15.1 j
Force Downplane = mg sin 53 = 62.61 N
work = 62.61 * 2 = 125.22 j
Net Force downplane = force downplane - force friction = 55.06 N
net Work = force * distance = 55.06 N * 2 M = 110.12 j
<h2>
Answer: 15 s</h2>
Explanation:
This is a situation related to vertical motion with constant acceleration, where the equation that will be usefull is:
(1)
Where:
is the final height of the ball (when it reaches the ground)
is the initial height of the ball (is also zero because is thrown from ground)
is the initial velocity of the ball
is the time the ball is in air (on Earth)
is the acceleration due to gravity on Earth
is the acceleration due to gravity on the Moon
Having this clear, let's solve (1) for the Earth:
(2)
(3)
(4)
(5)
(6) This is the initial velocity
Using this same velocity and equation (4) for the Moon:
(7)
Finally finding
: