Answer:
Hydropower Plants. Hydropower plants are places where the generation of electricity takes place with the help of water. ...
Wind Mills. Windmills form one of the good examples of applications of kinetic energy. ...
Moving Car. ...
Bullet From a Gun. ...
Flying Airplane. ...
Walking & Running. ...
Cycling. ...
Rollercoasters.
Explanation:
,
Image result for nervous signal transmissionchem.libretexts.org
The transmission of a nerve impulse along a neuron from one end to the other occurs as a result of electrical changes across the membrane of the neuron. The membrane of an unstimulated neuron is polarized—that is, there is a difference in electrical charge between the outside and inside of the membrane.
and
The nervous system can respond quickly to stimuli, through the use of action potentials and neurotransmitters. Responses to nervous system stimulation are typically quick but short lived. The endocrine system responds to stimulation by secreting hormones into the circulatory system that travel to the target tissue.
Answer:
f'= 607.8 Hz
Explanation:
This is a Doppler effect exercise due to the relative velocity of the sound source and the observer.
By the time the source and the observer are getting closer the expression is
f ’=
where vs is the speed of the source, vo is the speed of the observer, if the bodies move away the signs are exchanged
in this case, train 1 emits sound, so its speed is v_s = 30.3 m / s and train 2 is the receiver of the sound v₀ = 22.5 m / s
let's calculate
f ’= 
520 (343+ 22.5 / 343 - 30.3)
f'= 607.8 Hz
By Newton's 2nd law, m*a=sum_of_forces where m is the mass and a the acceleration. Here there are two forces in opposed directions.
Thus 5*a=40-8=32 therefore a=32/5=6.4m^s/2
= 26.3 * 
= 2.63 *
N