Ineed ! a 2.0 kilogram toy cannon is at rest on a frictionless surface. a. remote triggering device causes a 0.005 kilogram projectile to be fired from the cannon. which of the following equations best describes this system after the cannon is fired? a) speed of cannon + speed of projectile=0b) mass of cannon + mass of projectile = 0 c) velocity of cannon + velocity of projectile=0d)momentum of cannon + momentum of projectile= 0 d is the correct answer but i need an explanation of why it is the right answer

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

1. consider the case in which air fills air shocks on a truck trailer. the pressure in the shocks is 2 mpa. the temperature is 300 k. the diameter of the shock piston is 10 cm and the initial length of the cylindrical cavity containing the compressed air is 40 cm. a. the truck is gradually loaded over a period of a day in a static setting. the temperature is held constant for the atmosphere and thus for the gas shock. calculate the compressibility of the air in the shock for this condition when the truck is initially being loaded. b. if the shocks were loaded in a dynamic setting by driving over bumps, what would be the compressibility? state your assumption. c. what is the initial load on the shock if the shock is in an atmospheric 100 kpa? d. if the shock is compressed using the process described in part a, and the air shock compressed air cavity length decreases to 20 cm, what is the additional load applied to the shock?

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n