Answer:
efficiency of a simple machine is defined as the ratio of useful work done by a machine (output work) to the total work put into the machine (input work). For ideal or perfect machine, work output is equal to the work input.
Explanation:
hope it will help you
The density of a substance is the ratio of its mass to its volume. So whatever volume you have (call it
), the density
is computed by
![\rho=\dfrac{200\,\mathrm g}V](https://tex.z-dn.net/?f=%5Crho%3D%5Cdfrac%7B200%5C%2C%5Cmathrm%20g%7DV)
<u>Answer:</u>
The human brain and its secretion affect human behavior significantly.
<u>Explanation:</u>
The sympathetic nervous system responds to the stimuli of danger while the parasympathetic nervous system helps us to relax by secreting specific hormones.
These two systems interact with the endocrine system and release hormones and chemicals which circulate in our body and regulate our emotions and behaviors. These hormones and chemicals not only affect our growth and metabolism behaviors but also control our emotions such as anger, sadness, happiness, and fear.
R = D/2 = 4.0 / 2 = 2 m
a = V² / R = 2,8² / 2 = 7.84 / 2 = 3.92 m/s²
Explanation:
<h2>A gamma - Ray Brust (GRB) is often the brightest source in the sky, often brighter than everything else combined. </h2>