Raj is sitting on a chair. Now, his son Arun sits on his lap. Which of the following will change after Arun sits on his lap? P. the force acting on the seat of the chair
Q. the pressure acting on the seat of the chair
R. the area of the seat of the chair
1) only P
2) only Q
3) only P and Q
4) only Q and R

Which is special about a dc circuit ? a. it has both series and parallel components b. it has only series or only parallel components c. charge moves in a single direction d. charge moves back and forth quickly

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?

Wave functions describe orbitals in a hydrogen atom. each function is characterized by 3 quantum numbers: n, l, and ml. if the value of n = 2: the quantum number l can have values from to . the total number of orbitals possible at the n = 2 energy level is .