Answer:
615 N
Explanation:
If θ is the angle from vertical and T is the rope tension
θ = arcsin (2.0 / 3.5) = 34.85°
Summing vertical forces to zero
Tcosθ - mg = 0
T = 90.0(9.81) / cos34.85 = 1,075.85 N
Summing horizontal forces to zero
F - Tsinθ = 0
F = 1075.85sin34.85 = 1075.85(2.0/3.5) = 614.772... ≈ 615 N
Answer:
they are eletric and magnetic
Explanation:
you would have C) two north poles and two south poles
Answer:
266 g or 0.266 kg
Explanation:
The formula for specific heat capacity is given as,
Q = cm(t₂-t₁) ..................... Equation 1
Where Q = Heat Energy, c = specific heat capacity of Aluminum, m = mass of the aluminum fins, t₁ = initial temperature, t₂ = final temperature.
make m the subject of the equation,
m = Q/c(t₂-t₁)................... Equation 2
Given : Q = 2571 J, c = 0.897 J/g.°C, t₁ = 15.73 °C, t₂ = 26.50 °C.
Substitute into equation 2
m = 2571/[0.897×(26.5-15.73)]
m = 2571/9.661
m = 266 g or 0.266 kg
Hence the mass of the Aluminum fins = 266 g or 0.266 kg
