Numerade

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Nishant Kumar

Numerade educator

There are 128.2 g of rubidium (atomic mass = 85.47 amu). Calculate the number of mole? How many atoms are there?

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Ronald Prasad

Numerade educator

Chlorine consists of two major isotopes, one with 18 neutrons (75.77 percent of natural chlorine atoms) and one with 20 neutrons (24.23 percent of natural chlorine atoms). The atomic number of chlorine is 17 (it has 17 protons in its nucleus).

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Christian Dell

Numerade educator

A car with mass 1500kg traveling east at a speed of 25m/s collides at an intersection with 2500kg van traveling north at a speed at 20m/s find the magnitude and direction of the velocity of the wreckage after the collision, assuming that the vehicles undergo a perfectly in elastic collision and assuming that friction between vehicles and the road can be neglected

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Vishal Gupta

Numerade educator

I = F · t = ?P ?P = m2v2 - m1v1 = 1.5 x 10^3 x 2.6 - 1.5 x 10^3 I = Fnet · ?t An SUV with mass 1.80 x 10^3 kg is travelling eastbound at +15m/s while a compact car with mass 9.00 x 10^2 kg is travelling westbound at -15m/s. The car collide head on becoming entangled a. Find the speed of the entangled cars after collision b) Find the change in the velocity of each car. c) Find the change in the kinetic energy of the system consisting of both cars. 1/2 m1v1^2 + 1/2 m2v2^2 = 1/2 m1v1'^2 + 1/2 m2v2'^2 m1(v1^2 - v1f^2) = m2(v2f^2 - v2i^2)