If there's no air resistance, then the diver keeps moving horizontally at 40 m/s, even after s/he jumps out of a perfectly good airplane.
Also, gravity ADDS 9.8 m/s of downward speed for every second the diver falls.
One second after leaving the airplane, the diver is moving horizontally at 40 m/s, and moving vertically downward at 9.8 m/s .
The question asks for the "downward velocity". That's 9.8 m/s .
The diver's TOTAL velocity is
√ (40² + 9.8²)
= √ (1,600 m²/s² + 96.04 m²/s²)
= √ (1,696.04 m²/s²)
= 41.2 m/s in some direction between
straight forward and straight down.
Answer: burning and melting
Combustion (burning of molecules) is an exothermic oxidation-reduction reaction. When the combustion is intense, it results in a flame or an explosion (deflagration or detonation if the flame front exceeds the speed of sound).
This chemical reaction is a recombination of molecules. It goes through an intermediate step during which the molecules are "destructured" but not yet recombined; these are called radicals and are very reactive. In the case of combustion, the radicals are created by chemical bond breakage due to thermal energy, and they will be able to act on the molecules of the product (releasing other radicals) and thus generating a chain reaction that will continue as long as the following two conditions are met: presence of fuel and oxidizer.
Digestion is a food processing that is ingested into smaller particles that can or can not be assimilated by the body.
Explanation:
Answer:
Nature and size of image:
the image is formed at the focus (F), the image is virtual,erect and highly diminished.
<span>The correct answer is option B. i.e UV Rays. The Ultra violet light is the part of electromagnetic light whose wavelength is less than the Visible light light. i.e. UV range is from 10 nm to 400 nm. UV light is invisible to the naked eye.</span>
