The baseball of mass 140g travels at a speed of 30 m/s.
Its momentum is
P₁ = (140 x 10⁻³ kg)*(30 m/s) = 4.2 (kg-m)/s
Part a.
The momentum is dissipated in 1.5 s.
The average force, F, that dissipates the momentum is
(F N)*(1.5 x 10⁻³ s) = 4.2 (kg-m)/s
F = 2800 N = 2.8 kN
Answer: 2.8 kN
Part b.
The average force that the baseball exerts on the head is 2.8 kN, as obtained in part a.
This is true if the time to dissipate the momentum is 1.5 ms.
Answer: 2.8 kN
Part c.
Answer:
(a) The forehead will not fracture because 2.8 kN < 6.0 kN.
(b) Your cheek will fracture because 2.8 kN > 1.3 kN
It depends on how many ounces of grains they eat every day.
Answer:
Make sure that you are always with family or friends. Talk about the traumatic event with others. Keep reminding yourself that the event is over and you are no longer in any danger. Get physical exercise.
<span>The effects of stimulants<span> on the brain
causes disruption of brain<span> neurons or
modifying the normal communication that occurs among brain<span> circuits.
They are referred as substances that increase certain types of cell signaling
and amplify various physiologic processes throughout the </span></span>brain and body.
Moreover, the effects of stimulant includes
the brain processes of sensory information throughout the body, muscle movement
and locomotion, bodily functions, thoughts and feelings, perception and moods and
thus, create disturbance over the controls of all behavior.</span></span>
A.Blood alcohol concentration is affected by factors such as body size and gender
