Answer:
C
Explanation:
The fume hood's ventilation system pulls fumes and fire away from you and the lab, it is safer.
Answer:
a) r = 4.22 10⁷ m, b) v = 3.07 10³ m / s and c) a = 0.224 m / s²
Explanation:
a) For this exercise we will use Newton's second law where acceleration is centripetal and force is gravitational force
F = m a
a = v² / r
F = G m M / r²
G m M / r² = m v² / r
G M / r = v²
The squared velocity is a scalar and this value is constant, so let's use the uniform motion relationships
v = d / t
As the orbit is circular the distance is the length of the circle in 24 h time
d = 2π r
t = 24 h (3600 s / 1 h) = 86400 s
Let's replace
G M / r = (2π r / t)²
G M = 4 π² r³ / t²
r = ∛(G M t² / (4π²)
r = ∛( 6.67 10⁻¹¹ 5.98 10²⁴ 86400² / (4π²)) = ∛( 75.4 10²¹)
r = 4.22 10⁷ m
b) the speed module is
v = √G M / r
v = √(6.67 10⁻¹¹ 5.98 10²⁴/ 4.22 10⁷
v = 3.07 10³ m / s
c) the acceleration is
a = G M / r²
a = 6.67 10⁻¹¹ 5.98 10²⁴ / (4.22 10⁷)²
a = 0.224 m / s²
Answer:
is less pressure on the ground and the tyres do not sink into comparatively soft ground in the fields.
Explanation:
^^^^^^^^^^^^^
Answer:
Weight of gasoline = 2039.93 kN
Volume = 80783.80 gallon
Explanation:
Volume = Base area x Depth
Depth = 22 ft
Volume = 490.88 x 22 = 10799.22 ft³ = 10799.22 x 0.0283168 = 305.8 m³
Density of gasoline = 680 kg/m³
Mass of gasoline = 305.8 x 680 = 207943.65 kg
Weight of gasoline = 207943.65 x 9.81 = 2039.93 kN
We have 1 m³ = 264.172 gallon
305.8 m³ = 305.8 x 264.172 = 80783.80 gallon