Answer:
At point A. it gets kinda loud then at point B. it gets very loud than at point C. it gets quieter than at point D. it gets more silent.
Explanation:
Because you can tell when the waves get large it gets louder and then when the waves get more far apart then it get more quiet. Hope this helped!
The efficiency of steam engine is 26.66 %.
<h3>What is Efficiency?</h3>
The efficiency is defined as the work done by the engine divided by the heat supplied.
Work done is the difference between the heat supplied and heat rejected.
So, efficiency η = (Qs -Qr) / Qs
Given is the heat supplied Qs = 225 Joules and heat rejected Qr =285 . then the work done is
W = 225 -225 = - 60 Joules
Efficiency η = 60/225 x 100%
η = 26.66 %
Thus, the efficiency of the steam engine is 26.66 %.
Learn more about efficiency.
brainly.com/question/13828557
#SPJ2
Explanation:
Mass of the crate, m = 68 kg
We need to find the resulting acceleration if :
(a) Force, P = 0
P = m a
⇒ a = 0
(b) P = 181 N
(c) P = 352 N
Hence, this is the required solution.
This is the match:
1) stored energy related to positions of atoms within molecules ↔ chemical energy
Explanation: the chemical energy is the energy stored in the bonds that binds the atoms that form the molecules.
2) energy released when a nucleus splits or combines ↔ nuclear energy
Explanation: there is a huge energy inside an atom which may be released when nuclei suffer fusion (combination of nuclei) or fission (split of nuclei). The fusion of atoms is what happens in stars and it is the source of their energy. Fision of atoms is the nuclear energy used in the nuclear plants to produce electricity.
3) energy related to an object's movement ↔ motion energy
Explanation:
The motion energy is the kinetic energy, KE. KE = (1/2) m* v^2
4) energy related to heigth ↔ gravitaional potential energy
The higher an object is the higher its gravitational potential energy, PE.
PE = m*g*h.
5) energy related by vibration of a string ↔ sound energy
Explanation:
Sure you have seen that: when the string of a guitar vibrate the sound is produced.
6) energy of motion of particles in a substance ↔ thermal energy
The thermal energy is the product of the motions (vibration, translation and collisions) of the molecules that form the substance. The higher the motion the the higher the thermal energy measured as temperature.
Answer:
the googles are 4.33mm from the edge
Explanation:
In this question, we are asked to calculate the distance of a set of googles from the edge of a pool.
We proceed as follows;
depth of pool , d = 3.1mm
Now, let i be the angle of incidence
i = arctan(1.8/1.2)
i = 56.31 degree
Using snell's law ,
n1 * sin(i) = n2 * sin(r)
1 * sin(56.3) = 1.33 * sin(r)
r = 38.72 degrees
Now,
distance of googles = 1.8+ d*tan(r)
distance of googles = 1.8+ 3.1 * tan(38.72)
distance of googles = 4.3 mm
