Electron volts...........
Health and safety are two reasons
Answer:
θ = cos^(-1) (-A/B)
Explanation:
The image of the reauktant forces A & B are missing, so i have attached it.
Now, from the attached image, we will see that;
Angle between A and B is θ
Also;
A = Bcos(180° − θ)
Now, in trigonometry, we know that;
cos(180° − θ) = -cosθ
Thus;
A = -Bcosθ
cosθ = -A/B
Thus;
θ = cos^(-1) (-A/B)
let the ron and hermoine apply force along the horizontal direction . let ron pulls in left direction. and hermoine pulls towards right
lets assume that the left direction is taken as negative and right direction as positive.
F = force applied by ron towards left
F' = force applied by hermoine towards right
a = acceleration of the book
m = mass of book
force equation for the book is given as
- F + F' = ma
Given that : F = F'
hence
- F' + F' = ma
0 = ma
a = 0 m/s²
since the book was initially at rest and the acceleration comes out to be zero, hence the book will not move.
so correct choice is
D) The book will not move
Alvin (DSV-2) is a manned deep-ocean research submersible owned by the United States Navy and operated by the Woods Hole Oceanographic Institution (WHOI) in Woods Hole, Massachusetts. The vehicle was built by General Mills' Electronics Group[2] in Minneapolis, Minnesota. Named to honor the prime mover and creative inspiration for the vehicle, Allyn Vine, Alvin was commissioned on 5 June 1964. The submersible is launched from the deep submergence support vessel RV Atlantis (AGOR-25), which is also owned by the U.S. Navy and operated by WHOI. The submersible has made more than 4,400 dives, carrying two scientists and a pilot, to observe the lifeforms that must cope with super-pressures
