The density of silver is ρ = 10500 kg/m³ approximately.
Given:
m = 1.70 kg, the mass of silver
t = 3.0 x 10⁻⁷ m, the thickness of the sheet
Let A be the area.
Then, by definition,
m = (t*A)*ρ
Therefore
A = m/(t*ρ)
= (1.7 kg)/ [(3.0 x 10⁻⁷ m)*(10500 kg/m³)]
= 539.7 m²
Answer: 539.7 m²
When lava reaches the surface of the Earth through volcanoes or through great fissures the rocks that are formed from the lava cooling and hardening are called extrusive igneous rocks. Some of the more common types of extrusive igneous rocks are lava rocks, cinders, pumice, obsidian , and volcanic ash and dust.
Answer:
you have to substitute the volume of the ballonn with no ruler
Answer:
Explanation:
Acceleration acts for 9 s and deceleration acts for 12 - 9 = 3 s.
Total distance covered = 990 m
initial velocity u = o
Distance covered while accelerating
s₁ = 1/2 a 9² where a is the acceleration
= 40.5 a
final velocity after 9 s
v = at = 9a
while decelerating
v² = u² - 5 x s₂
0 = (9a)² - 5 s₂
s₂ = 16.2 a²
Distance covered while decelerating = 16.2 a²
s₁ + s₂ = 990
40.5 a + 16.2 a² = 990
16.2 a² + 40.5 a - 990 = 0
a = 6.5
5 Apatite
6 Feldspar
7 Quartz
8 Topaz
