LEARNING TASK 1: True or False: Write Ton the blank if the statement is true and F if the statement is false 1. In inelastic collision the kinetic energy of the system is conserved.
2. Momentum is conserved if the initial kinetic energy before collision is equal to the kinetic energy after the collision
3. In inelastic collision, the kinetic energy before the collision is always less than the kinetic energy
after the collision.
4. Objects in elastic type of collision stick together after the collision.
5. If there is no external force acting on the system, the total momentum of the system after collision is equal to zero.​

An object weigh 40n in air ,weigh 20n when submerged in water,and 30n when submerged in a liquid of unknown liquid density.what is the density of unknown of liquid?

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.