Answer: What makes the Earth habitable? It is the right distance from the Sun, it is protected from harmful solar radiation by its magnetic field, it is kept warm by an insulating atmosphere, and it has the right chemical ingredients for life, including water and carbon.
Explanation:
Answer:
Velocity ratio of a lever is 3 means distance travelled by effort is 3 times the distance travelled by the load. Efficiency of the pulley is 60%means 40% of the energy is lost in the machine due to the friction
Answer:
100 N
Explanation:
From the question given above, the following data were obtained:
Mass (m) = 5 kg
Acceleration (a) = 20 m/s
Force (F) =?
Force is simply defined as the product of mass and acceleration. Mathematically, it can be expressed as:
Force (F) = mass (m) × acceleration (a)
F = ma
With the above formula, we can obtain the force need to move the object. This can be obtained as follow:
Mass (m) = 5 kg
Acceleration (a) = 20 m/s
Force (F) =?
F = ma
F = 5 × 20
F = 100 N
Therefore, a force of 100 N is needed to move the object.
D. Because the moons shadow during a total lunar eclipse is tinnier than the earth.
Answer:
MT disc I = 2,752 10-3 kg m²
MB disc I = 2,726 10⁻³ kg m²
Explanation:
The moment of inertia given by the expression
I = ∫ r² dm
for bodies with high symmetry it is tabulated
for a hollow disk it is
I = ½ M (R₁² + R₂²)
let's apply this equation to our case
disc MT = 1,357 kg
I = ½ 1,357 (0.0079² + 0.0632²)
I = 2,752 10-3 kg m²
disk MB = 1,344 kg
I = ½ 1,344 (0.0079² + 0.0632²)
I = 2,726 10⁻³ kg m²
