Answer:
B. 6m/s southeast
Explanation:
velocity= distance / time
= 180/ 30
6m/s southeast
Answer:
Cosmology is a branch of astronomy that involves the origin and evolution of the universe, from the Big Bang to today and on into the future. According to NASA, the definition of cosmology is "the scientific study of the large scale properties of the universe as a whole."
Answer:
c. 10.0 J
Explanation:
The heat (Q) needed to increase the temperature of a certain mass of a sample can be calculated using the following expression:
Q = c . m . ΔT
where,
c is the heat capacity
m is the mass
ΔT is the change in temperature
Let's call Q₁ (5.0 J) the heat to increase the temperature of the mass m₁ by ΔT = 10.0°C.
Q₁ = c . m₁ . ΔT
If the mass is doubled (m₂ = 2 m₁), the heat required is:
Q₂ = c . m₂ . ΔT = c . 2 . m₁ . ΔT = 2 . c . m₁ . ΔT = 2 . Q₁
Q₂ = 2 . Q₁ = 2 . 5.0 J = 10.0 J
<span>Moles of Cu = 2.10 /21 = 0.1 Moles of Ag produced is 0.2 Mass of Ag = 0.2 x 108 = 21.6 g.
0.500 g/108 = 0.046 moles, but Cu. moles produced will be half as much, from equation = 0.23moles
mass of Cu = 0.023 x2.10 = 0.0483g</span>
