Answer:
39.6138 °C
Explanation:
Heat gain by water = Heat lost by nickel
Thus,
Where, negative sign signifies heat loss
Or,
For water:
Volume = 100.0 mL
Density of water= 1 g/mL
So, mass of the water:
Mass of water = 100 g
Initial temperature = 22.0 °C
Specific heat of water = 4.186 J/g°C
For nickel:
Mass = 275 g
Initial temperature = 100 °C
Specific heat of nickel = 0.444 J/gK = 0.444 J/g°C
So,
Thus,
The final temperature of the combined metals is 39.6138 °C
<span>b. the weather patterns outside
There are three types of heat transfer or heat propagation; conduction, convection and radiation. Heat transfer is the process by which heat projects externally however, depending on the temperature and pressure. Also called the movement of heat from a low temperatured state which increases as heat progresses.
Conduction is the heat transfer by contact, immediate contact.
Convection is the transfer of heat through air and water.
Radiation is the transfer of heat regardless of the presence of atoms or particles.
</span>
Answer:
79.1°
Explanation:
Given:
x₀ = 0 m
y₀ = 0 m
x = 19500 cos 32°
y = 19500 sin 32°
v₀x = 1810 cos 20°
v₀y = 1810 sin 20°
t = 9.20
Find:
ax, ay, θ
First, in the x direction:
x = x₀ + v₀ t + ½ at²
19500 cos 32° = 0 + (1810 cos 20°) (9.20) + ½ ax (9.20)²
16537 = 15648 + 42.32 ax
ax ≈ 21.01
And in the y direction:
y = y₀ + v₀ t + ½ at²
19500 sin 32° = 0 + (1810 sin 20°) (9.20) + ½ ay (9.20)²
10333 = 5695 + 42.32 ay
ay ≈ 109.6
The direction of the acceleration is therefore:
θ = atan(ay / ax)
θ = atan(109.6 / 21.01)
θ ≈ 79.1°
To show your engaged in the learning topic and to show your undivided attention
A campfire being lighted and plants converting carbon-dioxide and water into glucose and oxygen are both forms of chemical change.
Therefore, the answer is:
B. Both are examples of chemical change.
