A blue-ball of mas m=3 kg is thrown with an initial speed 0 m/s, at an angle of θ=32.4° above the horizontal. At the same time, a black-ball of mass m=2 kg is dropped from rest. When blue-ball starts the projectile motion, the black-ball is 19.62 m above the ground and starts the free-fall. After 1.3 s later, these two balls stick together after colliding in the air (no air resistance), in the case of perfectly inelastic collision. a) Find the momentum vector after perfectly inelastic collision.
b) When and where do they hit the ground after perfectly inelastic collision?.

The intensity, or loudness, of a sound can be measured in decibels (db), according to the equation , where i is the intensity of a given sound and is the threshold of hearing intensity. what is the intensity, in decibels, [i(db)], when ? use a calculator. round to the nearest whole number. 8 9 19 80

1. how much energy is needed to raise the temperature of 40.0 g of argon from 25c to 40c? the specific heat capacity of argon is 0.520 j/(g·k) 2a. 23.0 ml of 0.100 m hcl (standard) are added from a buret to neutralize 50.0 ml of an unknown basic solution. 2b. if the oh- produced in the previous reaction came from ca(oh)2, then what is the molarity of the ca(oh)2? 3.calculate the new freezing-point of a solution when 60.5 grams of cacl2 solute is dissolved in 0.612 kg of water. 4. what is the maximum number of moles of alcl3 that can be produced from 5.0 mol al and 6.0 mol cl2? 5. a sample of oxygen gas has a volume of 150 ml when its pressure is 0.923 atm. if the pressure is increased to 0.987 atm and the temperature remains constant, what will the new volume be? 6. nitrogen gas in a closed container at a temperature of 100.0 oc and 3.0 atm is heated to 300 oc. what is the pressure of the gas at the higher temperature?

The substances that are necessary for producing of certain hormones and that store and transport vitamins