Answer:
according to the new geometry lesson alcometry which will after 11 years in geometry
In scientific terms, ultrasound is a sound pressure, cyclic in nature, that has a greater frequency than the limit at the top of human hearing capabilities. What this means is that an ultrasonic sound can’t be heard by the human ear because their frequency is too high for our ears to pick up. In healthy young adults, this upper hearing capability is an average of 20 kilohertz. Ultrasound has many applications in several fields. Perhaps the best known application for ultrasound is sonography. This is where medical staff use the high pitched noise to produce a picture of a fetus while in the mother’s womb. Another use however, doesn’t directly concern humans at all. Bats use the high pitched noises to see in the dark and get an accurate reading on their preys internal structure. A popular belief is that an ultrasonic sound has the ability to turn the locking mechanism in a door lock, as demonstrated on some spy movies. On the opposite side of this are infrasonic sounds. These are noises with a frequency less than the lowest level of human hearing capabilities is 20 hertz. It is possible for humans to perceive infrasonic sounds, but only if the air pressure is sufficient. Although the war is the main tool for hearing these low sounds, it is possible for other parts of the body to “feel them”. Infrasound can be used to send signals in the army to special machines that can pick them up. These can be used to transmit vital data. Animals are able to pick up some low infrasonic noises which warn them of natural disasters before they happen, generally earthquakes and tsunamis.
I hope some of this information I gave you can help you. I came up with everything myself to help you.
Answer:
The heat input per cycle is closest to 230.8 J
Explanation:
Given;
percentage of energy waste = 35%
The lowest cold-reservoir temperature = 15.0°C
useful work done in the reservoir per cycle = 150.0 J
To design an ideal Carnot heat engine that wastes only 35.0% of the heat that goes into it.
If 35% of heat input = wasted work, then
65 % of heat input = useful work
∴ 0.65 × heat input = 150
heat input = 150/0.65
heat input = 230.8 J
Therefore, the heat input per cycle is closest to 230.8 J
1.THATS kinda more observed question..
well I think microwave the material is baked by passing microwave radiations. which then makes the cake fluffy. which is not like normal heating apparatus, I believe the baking dish do have certain rise in temperature,but not more as the waves are conducted it is not like normal heating which will be then conducted..
2. also it depends on the material too I mean plastic will melt but glass won't.. one has to experimentally observe and perform in order to have a full understanding of this question
