Answer:
T = 30.42°C
Explanation:
According to the conservation of energy principle:
E = 120 KJ
mc = mass of copper = 13 kg
Cc = specific heat capacity of copper = 0.385 KJ/kg.°C
T2c = T2w = Final Equilibrium Temperature = T = ?
T1c = Initial Temperature of Copper = 27°C
T1w = Initial Temperature of Water = 50°C
mw = mass of water = 4 kg
Cw = specific heat capacity of water = 4.2 KJ/kg.°C
Therefore,
<u>T = 30.42°C</u>
Density of Earth: 5.514 g/cm³
Density of Jupiter: <span>1.326 g/cm³
1.326 g/cm³ / 5.514 g/cm³ </span>≈ <span>0,24
0,24 * 100 = 24%
Jupiter has 24% of earth's density.
(Density numbers are from internet, you may calculate with your own ones if u have )</span>
D
Explanation:
The are the same but difference
Answer:
doubled
Explanation:
F=ma1----------(1)
2F = ma2-------(2)
Divide 2nd equation by 1st one
we get a1×2=a2
Answer:
2.26 s
Explanation:
Let's take down to be positive.
Given (in the y direction):
Δy = 25 m
v₀ = 0 m/s
a = 9.8 m/s²
Find: t
Δy = v₀ t + ½ at²
25 m = (0 m/s) t + ½ (9.8 m/s²) t²
25 = 4.9t²
t = 2.26 s
If the ball instead had an initial horizontal velocity of 5 m/s, its initial vertical velocity is still 0 m/s. So the time to fall is still 2.26 s.
