Objects with masses of 149 kg and 1/3 kg are separated by 0.332 m. A 51.6 kg mass is
placed midway between them.
PART 1: Find the magnitude of the net gravitational
force exerted by the two larger masses on the
51.6 kg mass. The value of the universal gravi-
tational constant is 6.672 x 10-11 N. m2/kg2.
Answer in units of N. PART 2: leaving the distance between the 149 kg and the 773 kg masses fixed at what distance from the 773 kg mass (other than infinitely remote ones) does the 51.6kg mass experience a net force of zero? Answer in units of m.

What type of nuclear decay causes the atomic number of an element to increase by 1?

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.

Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?