Answer:
(a) 37.5 kg
(b) 4
Explanation:
Force, F = 150 N
kinetic friction coefficient = 0.15
(a) acceleration, a = 2.53 m/s^2
According to the newton's second law
Net force = mass x acceleration
F - friction force = m a
150 - 0.15 x m g = m a
150 = m (2.53 + 0.15 x 9.8)
m = 37.5 kg
(b) As the block moves with the constant speed so the applied force becomes the friction force.
Answer:
3050.6 Litre .
Explanation:
Total time of heart beat = Total time of race = 2 hrs , 39 minutes and 54 seconds
= 2 x 60 + 39 + 54/60 min
= 120 + 39 + .9 min
= 159.9 min
rate of heart beat = 170 per min
Total no of heart beat during race = 170 x 159.9
volume of blood per kg per beat = 2.5 mL per kg of weight
body weight = 99 pounds = .4535 x 99 kg = 44.89 kg
volume of blood per beat = 2.5 mL x 44.89 mL
= 112.225 mL .
Total required volume of blood = 112.225 x 170 x 159.9 mL
= 3050612 mL
= 3050.6 L.
Conduction. Because they are connected as they tranfer energy
Answer: The first crane has greater power
Explanation:
Answer:
Stable, Cation, Donor Atom
Explanation:
When an atom has less than 4 electrons in its valence shall, it tends to lose those electrons to becomes stable. Because an atom becomes stable when its valence shell is complete. So, when it loses the electrons its valence shell becomes complete. Also, after the loss of the electrons a positive charge is developed on the atom and it becomes an cation or donor atom.
Hence, there can be multiple answers to this question.
Atoms with fewer than 4 valence electrons want to give their electrons to become <u>Stable, Cation, Donor Atom.</u>
