A material that lets light pass through freely is a prisim
1. Rainbow (white light is split into its subsequent wavelengths)
2. Light enters through the cornea, is adjusted by the lens, the cones and rods of the retina are responsible for the perception of color and shadows, which are sent through the optic nerve to the occipital lobe of the brain.
3. Sound waves are intercepted by the pinna, travels through the auditory canal, reverberates on the eardrum, the vibrations travel through the ossicles of ear (hammer, anvil and stirrup), continuing to the cochlea and are sent through the auditory nerve to the brain.
4. A medium
5. Vibrations
6. All
7. Faster
8.Their kinetic energy increases
9. Conduction, convection and radiation
10. The heating of metals in the mantle, creates a current which slowly moves the plates above it.
The amount of work done by the person is equal to 120 Joules.
<u>Given the following data:</u>
- Displacement = 15 meters.
To calculate the amount of work done by the person at a total height of 2 meters:
<h3>How to calculate work done.</h3>
In Science, work done is calculated by multiplying force and the displacement experienced by an object.
Mathematically, work done is given by the formula:
Substituting the given parameters into the formula, we have;
Work done = 120 Joules.
Read more on work done here: brainly.com/question/22599382
Answer:
Speed and velocity both measure an object’s rate of motion. However, speed is a scalar quantity, which means that it can be described with a numerical value. Velocity is a vector quantity, which depends on direction as well as magnitude. Read these definition for more information:
speed - the rate of distance traveled by a moving object over time
velocity - the rate of displacement of a moving object over time
Basically, an object’s speed tells you how fast it’s going. Its velocity tells you how fast it’s going in a certain direction. You use speed measurements in your daily life, but physicists depend on velocity measurements more frequently in their work.
Explanation:
Answer:
a. acceleration (a) = 4.9 m/s²
b.
c. see the attached diagram below
d V = 0.048 m/s
e. The viscosity u = 0.27 Ns/m²
Explanation:
Given that :
m = 5 kg
A = ( 0.1 m )²
d = 0.20 mm
θ = 30 °
By applying Newton's second Law ; we have
F = mgsinθ - (since no friction ; then
ma = mg sinθ
a = gsin θ
a = 9.8 × sin 30
a = 4.9 m/s²
b) By applying Newton's second law at any instant .
ma = mgsin θ -
and = T×A = -
Also; ma =
∴ ma = mg sin θ -
separating the variables ; we have
By integrating using limits ; we have:
∴
c) The curve for V(t) plot is attached in the diagram below.
d)
To find the speed after 1 sec; we have:
at t = 1.0 sec;
V =
V = 0.048 m/s
e) In order to determine the viscosity for which V(0.1) = 0.3 m/s ; we have the following.
∴
The viscosity u = 0.27 Ns/m²