Explanation:
The box has no acceleration in the perpendicular direction, so the net force in that direction is 0.
Sum of forces in the parallel direction:
∑F = f − F∥ − mg∥
∑F = f − F cos φ − mg sin θ
Answer:
35 kilogram per stair will weight
What is the magnetosphere, and how does it help the earth?
The magnetosphere shields our home planet from solar and cosmic particle radiation, as well as erosion of the atmosphere by the solar wind - the constant flow of charged particles streaming off the sun. ... It is generated by the convective motion of charged, molten iron, far below the surface in Earth's outer core.
Explanation:
Answer:
170⁰C
Explanation:
α= ΔL/(lo×Δt)
arranging for Δt
Δt =ΔL/(lo×α)
here Δt is change in temperature, ΔL is change in length,lo is original length and is α coefficient of linear expansion and for copper its value is 17×10^-6
Δt =(0.00130)/(0.450×17×10^-6)
Δt=169.9⁰C
Δt= 170⁰C