Answer:
x_{cm} = 4.644 10⁶ m
Explanation:
The center of mass is given by the equation
= 1 / ∑
Where M_{total} is the total masses of the system, is the distance between the particles and is the masses of each body
Let's apply this equation to our problem
M = Me + m
M = 5.98 10²⁴ + 7.36 10²²
M = 605.36 10²² kg
Let's locate a reference system located in the center of the Earth
Let's calculate
x_{cm} = 1 / 605.36 10²² [Me 0 + 7.36 10²² 3.82 10⁸]
x_{cm} = 4.644 10⁶ m
6,000 Joules. The formula for KE is KE=1/2mv^2. 20^2= 400. 400 x 30=12,000. 12,000/2=6,000. :)
Answer:
-1.08×10⁶ m/s²
Explanation:
Given:
v₀ = 367 m/s
v = 0 m/s
Δx = 0.0621 m
Find: a
v² = v₀² + 2a (x − x₀)
(0 m/s)² = (367 m/s)² + 2a (0.0621 m)
a = -1.08×10⁶ m/s²
Answer:
Eifel Tower height will increase by 0.03888m
Explanation:
You can calculate the variation in height by using the coefficient of thermal expansion of the steel:
ΔH = H*α*ΔT
The coefficient of thermal expansion α is describes the change in length of an object after a change in temperature. the coefficient of thermal expansion of the steel depends on the composition of the steel, but in general, it has a value of around . Then, the variation in heigth will be equal to:
Answer:
1440 W
Explanation:
The power drawn by a voltage source is the rate of energy consumed, and it can be written as:
where
V is the voltage
I is the current
P is the power
For the source in this problem we have:
I = 12 A is the current
V = 120 V is the voltage of the source
Solving for P, we find the power: