Answer:
Explanation:
I suppose it has to do with the way the diagram is drawn. The heat does not reflect which makes both A and B incorrect.
C would have nothing to do with either reflection or refraction.
That only leaves D which is the answer.
Answer:
<em><u>A.9</u></em><em><u> </u></em><em><u>kWh</u></em>
Explanation:
Tv is rated 0.1 kW
in one day energy used will be 0.1kW ×3hr=0.3kwh
in 30 days energy used will be 0.3kwh×30=9kwh
Explanation:
Buoyancy force is equal to the weight of the displaced fluid:
B = ρVg
where ρ is the density of the fluid,
V is the volume of the displaced fluid,
and g is the acceleration due to gravity.
The fluid is water, so ρ = 1000 kg/m³.
The volume displaced is that of a sphere with radius 2 m:
V = 4/3 π r³
V = 4/3 π (2 m)³
V ≈ 33.5 m³
The buoyancy force is therefore:
B = (1000 kg/m³) (33.5 m³) (9.8 m/s²)
B ≈ 328,400 N
Round as needed.
Your answer is B. 1.53 m/s towards the beach.
110/72 = 1.52777 and then you round it to 1.53 :)
Answer: a) 
electrons are present is 7.74 L of water.
b)
is the net charge of all these electrons
Explanation:
a) Molar mass of the water = 18 g/mol
Volume of water = 7.74 L
Density of water = 1000 g/L
Mass of water in 7.74 L of water :
Mass of the water = 7740 g
Moles of water =
molecules
Number of water molecules in 430 moles:
molecules
1 molecule water contains = 10 electrons
Then
electrons
electrons are present is 7.74 L of water.
b) The net charge of all these electrons:
Charge on 1 electron =
The net charge of all these electrons:
is the net charge of all these electrons
