Một bình có thể tích 0,5m^ chứa không khí ở áp suất dư 2 bar, nhiệt độ 20.C. Lượng không khí cần thoát ra khỏi bình là bao nhiêu để áp suất
trong bình có độ chân không 420 mmHg trong điều kiện nhiệt độ khí xem
như không đổi. Áp suất khí quyển là 768 mm Hg ở 18.C, p = 29kg.

What happens to the light rays when they hit the specimen?

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 710 n/m. it is initially at rest on an inclined plane that is at an angle of θ = 23° with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is μk = 0.19. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. a) what is the block's initial mechanical energy? b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Will give brainliest! which statement best describes the similarities between fundamental forces? electromagnetic and strong nuclear forces influence the interaction between charged particles within an atom. gravitational and magnetic forces are both types of charges that occur in nature. nuclear and magnetic forces are both related to mass and weight. strong nuclear force is most like electrical force because they are both related to distance.