It's going to be the third one because conductors allow energy to flow but insulators don't.
Free fall without air resistance:
g=9.81 m/s²
t=235 s
h=?
h=0.5*g*t²
h=0.5*9.81*235²
h=270879m =270 km
Answer:
μ = 0.385
Explanation:
Given that,
The mass of the student, m = 69 Kg
The horizontal force applied, F = 260 N
The normal force acting on the body, weight = mg = 69g N
= 676.2 N
The coefficient of friction acting on a body is equal to the force acting on the body to the normal force acting on the body due to gravitation.
The formula for coefficient of friction,
μ = F / N
Substituting the values in the above equation,
μ = 260 N / 676.2 N
= 0.385
Hence, the coefficient of friction, μ = 0.385
Answer:
134 kg
Explanation:
The snowmobile is moving at constant speed, so the acceleration is 0.
Sum of the forces in the x direction:
∑F = ma
F − 360 = 0
F = 360
Friction force equals the normal force times the coefficient of friction:
Nμ = 360
On level ground, the normal force equals the combined weight:
(m + 50)g μ = 360
m + 50 = 360 / (gμ)
m = -50 + 360 / (gμ)
m = -50 + 360 / (9.8 × 0.2)
m ≈ 134 kg
Round as needed.
Answer: It is selling like crazy! When the Food and Drug Administration asked for scientific proof that the water actually does what it claims to do,
Explanation:
