Answer:
(a) ![\vec{J}=176.4\frac{kg*m}{s} \hat{j}](https://tex.z-dn.net/?f=%5Cvec%7BJ%7D%3D176.4%5Cfrac%7Bkg%2Am%7D%7Bs%7D%20%5Chat%7Bj%7D)
(b) ![F=2125.30N](https://tex.z-dn.net/?f=F%3D2125.30N)
Explanation:
(a) According to the law of conservation of energy, the potential energy of the person at 0.40 m is equal to its kinetic energy before the colision with the floor:
![\Delta U=\Delta K\\mgh=\frac{mv^2}{2}\\v=\sqrt{2gh}\\v=\sqrt{2(9.8\frac{m}{s^2})(0.40m)}\\v=2.8\frac{m}{s}](https://tex.z-dn.net/?f=%5CDelta%20U%3D%5CDelta%20K%5C%5Cmgh%3D%5Cfrac%7Bmv%5E2%7D%7B2%7D%5C%5Cv%3D%5Csqrt%7B2gh%7D%5C%5Cv%3D%5Csqrt%7B2%289.8%5Cfrac%7Bm%7D%7Bs%5E2%7D%29%280.40m%29%7D%5C%5Cv%3D2.8%5Cfrac%7Bm%7D%7Bs%7D)
This is the initial velocity in the negative y-direction. Impulse is given by:
![\vec{J}=\Delta \vec{p}\\\vec{J}=m\vec{v_f}-m\vec{v_i}\\\vec{J}=63kg(0 \hat{j})-63kg(-2.8\frac{m}{s} \hat{j})\\\vec{J}=176.4\frac{kg*m}{s} \hat{j}](https://tex.z-dn.net/?f=%5Cvec%7BJ%7D%3D%5CDelta%20%5Cvec%7Bp%7D%5C%5C%5Cvec%7BJ%7D%3Dm%5Cvec%7Bv_f%7D-m%5Cvec%7Bv_i%7D%5C%5C%5Cvec%7BJ%7D%3D63kg%280%20%5Chat%7Bj%7D%29-63kg%28-2.8%5Cfrac%7Bm%7D%7Bs%7D%20%5Chat%7Bj%7D%29%5C%5C%5Cvec%7BJ%7D%3D176.4%5Cfrac%7Bkg%2Am%7D%7Bs%7D%20%5Chat%7Bj%7D)
(b) The average force is:
![F=\frac{J}{\Delta t}\\F=\frac{176.4\frac{kg*m}{s}}{0.083s}\\F=2125.30N](https://tex.z-dn.net/?f=F%3D%5Cfrac%7BJ%7D%7B%5CDelta%20t%7D%5C%5CF%3D%5Cfrac%7B176.4%5Cfrac%7Bkg%2Am%7D%7Bs%7D%7D%7B0.083s%7D%5C%5CF%3D2125.30N)
The macromolecule that is made up of subunits that are called amino acids are the protein. The answer is therefore letter D. The carbohydrates are made up of subunits called monosaccarides. The lipids are mades up of subunits referred to as the fatty acid while nucleic acid are made up of nucleotides.
The velocity of the object. because the greater the movement in particles the greater would be the kinetic energy.
Answer:
B. Thermal energy
E. Sound energy
Explanation:
Thermal and sound energy is kinetic energy.
Kinetic energy is the energy that results as a function of the motion of a body or the particles of the medium.
Sound energy is transmitted by the vibration of the particles in the air. The vibration leads to movement of the particles and hence, kinetic energy is produced.
Thermal energy originates as a result of the temperature differences in a body. This temperature difference leads to the increase in the kinetic energy of some particles which also causes vibration and motion of the particles.
Answer:
you have to substitute the volume of the ballonn with no ruler