Answer:
Mass of the aluminium chunk = 278.51 g
Explanation:
For an isolated system as given the energy lost and gains in the system will be zero therefore sum of all transfer of energy will be zero,as the temperature will also remain same
A specific heat formula is given as
Energy Change = Mass of liquid x Specific Heat Capacity x Change in temperature
Q = m×c×ΔT
Heat gain by aluminium + heat lost by copper = 0 (1)
For Aluminium:
Q =
Q = m x 17.94 joule
For Copper:
Q= 4996.53 Joule
from eq 1
m x 17.94 = 4996.53
Mass of the aluminium chunk = 278.51 g
<span>The electrical potential inside a parallel-plate capacitor will increase linearly from the negative to the positive plate. If the charge is moving in the direction is naturally would move, the electric potential energy is said to decrease; if it moves in the opposite direction, it is said to increase. This is akin to lifting an object further away from the surface of the earth. As it is lifted higher, the electrical potential energy increases.</span>
<span>Answer: Because rock is more dense than water
Lithostatic pressure is pressure caused by soil or rock. It similar to hydrostatic pressure, the pressure caused by water. Pressure is force per area and force is dependent on the mass. Rock is denser than water, thus having more mass and more force.</span>
He is made a inference to the observation that the magnet doesn't stick<span />
Answer:
<em>Radius at liftoff 8.98 m</em>
Explanation:
At the working altitude;
maximum radius = 24 m
air pressure = 0.030 atm
air temperature = 200 K
At liftoff;
temperature = 349 K
pressure = 1 atm
radius = ?
<em>First, we assume balloon is spherical in nature,</em>
<em>and that the working gas obeys the gas laws.</em>
from the radius, we can find the volume of the balloon at working atmosphere.
Volume of a sphere =
volume of balloon = x 3.142 x = 57913.34 m^3
using the gas equation,
=
<em>The subscript 1 indicates the properties of the gas at working altitude, and the subscript 2 indicates properties of the gas at liftoff.</em>
imputing values, we have
=
0.03 x 57913.34 x 349 = 200V2
V2 = 606352.67/200 = <em>3031.76 m^3 this is the volume occupied by the gas in the balloon at liftoff.</em>
from the formula volume of a sphere,
V = = x 3.142 x = 3031.76
4.19 = 3031.76
= 3031.76/4.19
radius r of the balloon on liftoff = = <em>8.98 m</em>