Answer:
Explanation:
If the family needs 26 kW of power, and knowing that the efficient is 30% the relation between the solar flux and the power would be:
(1)
e is the efficient (in our case 0.3)
Φsolar is the solar flux
S is the effective surface
Solving (1) for S we have:
I hope it helps!
Answer:
Radioactive decay: is the process by which an unstable atomic nucleus loses energy by radiation.
Half-life: in radioactivity, the interval of time required for one-half of the atomic nuclei of a radioactive sample to decay (change spontaneously into other nuclear species by emitting particles and energy), or, equivalently, the time interval required for the number of disintegrations per second of a radioactive material to decrease by one-half.
Radiometric dating: is a method used to date rocks and other objects based on the known decay rate of radioactive isotopes.
Answer: height = 3.98m
Explanation: by placing the watermelon at a height above the ground, it has a potential energy of the formulae
p = mgh
p = potential energy = 4.61kJ = 4610J
m = mass of watermelon = 118 kg
g = acceleration due gravity = 9.8 m/s²
4610 = 118 * 9.8 * h
h = 4610/ 118 * 9.8
h = 4610/ 1156.4
h = 3.98m
<span>If the balloon is closed then both volume and pressure will increase when the gas inside is heated.</span>
Answer:
ALT key and type 0937 on the keypad.