Explanation:
It is given that,
Initial speed of the broad jump, u = 12 m/s
It is launched at an angle of 20 degrees above the horizontal. Let t is the time for which the track star i in the air before returning to Earth. The motion of the track star in the broad jump can be treat as the projectile motion. The time of flight of the projectile is given by :

Putting all the values in above equation as :

t = 0.837 seconds
So, the time for which the track star is in air is 0.837 seconds. Hence, this is the required solution.
Answer
Together with glycolysis, The Krebs cycle, and the electron transport chain release about 36 molecules of ATP per molecule of glucose.The Krebs cycle uses the two molecules of pyruvic acid formed in glycolysis and yields high-energy molecules of NADH and flavin adenine dinucleotide (FADH2), as well as some ATP. The electron transport chain forms a proton gradient across the inner mitochondrial membrane, which drives the synthesis of ATP
B. initiate an action potential.
Action potentials are initiated when a depolarization reaches a threshold potential. This threshold potential varies, but is normally around 55 or 50 millivolts above the resting potential of the cell, which implies that the input current of sodium ions exceeds the output current of potassium ions.
Answer:

Explanation:
27 cm = 0.27 m
As the blocks are hanging on 2 sides of the pulley, their difference in mass would generate a net force toward the heavier side:
Let g = 9.81 m/s2
F = g(2.7 - 1.4) = 9.81*1.3 = 12.753 N
This force would generate a torque at 0.27 m moment arm
T = F*r = 12.753*0.27 = 3.44 Nm
The moment of inertia of the solid disk:

Where m = 0.78 kg is the disk mass and R = 0.27 m is the radius of the disk.

So the angular acceleration of the torque is

So the linear acceleration is its angular component times radius

Answer:
last is the answer.
increase the voltage in order to send energy faster.