About 50 years ago, mounting evidence was suggesting
that the temperature of Earth's surface has been sharply
increasing for the past couple of centuries. Nowadays,
additional evidence no longer suggests it; it confirms it.
Today's mounting evidence suggests that human activity is
responsible for the increase, but that the increase eventually
spells curtains for much of human activity.
<u>First question:</u>
Density = 
Mass = density × volume
The density of the cube is 1.2g/cm³
The volume of the cube is given by side × side × side:
Volume = 7cm × 7cm × 7cm = 347cm³
Mass = 1.2g/cm³ × 343cm³ = 411.6g
*Hint: Just apply the formula Density = to solve the next questions.
Answer:
speed
Explanation:
according to your question, your answer is speed
This is a case of linear expansion. The general expression of linear expansion is given by:
ΔL = αLΔT, ΔL = change in length or height, α = coefficient of linear thermal expansion, ΔT = Change in temperature.
In the current case;
α = 2.5*10^-6 /°C (for Marble)
L = 170 m at 30.0°C
ΔT = 30 - (-16) = 46°C
Substituting;
ΔL = 2.5*10^-6 *170*46 = 0.01955 m
Height at -16°C = 170 - 0.01955 = 169.98 m
