Answer:
(a) 1.257 x 10^5 J
(b) 1.456 Watt
Explanation:
Volume of blood, v = 7500 L = 7.5 m^3
Height, h = 1.63 m
density of blood, d = 1.05 x 10^3 kg/m^3
(a) work done = m x g x h
W = v x d x g x h = 7.5 x 1.05 x 1000 x 9.8 x 1.63 = 1.257 x 10^5 J
(b) time = 1 day = 24 x 60 x 60 s = 86400 seconds
Power = Work / time = 1.257 x 10^5 / 86400 = 1.456 Watt
Answer: option 3 Ta < Tb = Tc < Td
Explanation:
Ta = mv²/r = mv²/r
Tb = m(2v)²/2r = (m)4v²/2r = 2mv²/r
Tc = (2m)v²/r = 2mv²/r
Td = (2m)(2v)²/r = (2m)4v²/r = 8mv²/r
The man on the ground in standing position has <u>more</u><u> </u><u>pressure</u><u>.</u> This is because when he stands, only his legs are in contact with the ground. While lying, his body is more in contact with the ground, therefore, he exerts less pressure.
To the point, <u>a</u><u> </u><u>manin</u><u> </u><u>standing</u><u> </u><u>posi</u><u>tion</u><u> </u><u>on</u><u> </u><u>the</u><u> </u><u>gr</u><u>ound</u><u> </u><u>had</u><u> </u><u>more</u><u> </u><u>pre</u><u>ssure</u><u>.</u>
More is the area of contact, less is the pressure efforted.
Thank you...
As per energy conservation we know that
Energy enter into the bulb = Light energy + Thermal energy
so now we have
energy enter into the bulb = 100 J
Light energy = 5 J
now from above equation we have
Basic division, divide 100km by 10 and you get the average speed of the ship.
10 Km/s
you do need the distance traveled and the time it took to travel that distance for this method