A rocket with 2 stages is launched from the ground. Initially, the acceleration of the rocket is 4 m/s^-2. When it reaches a height of 500 meters, the second stage activates and the acceleration of the rocket becomes 8 m/s^-2. The second stage is on for 10 seconds before it shuts off. a. For how much time was the first stage on?
b. What is the height of the rocket when the second stage shuts off?
c. What is the speed of the rocket when the second stage shuts off?

What are the applications of electromagnetic waves

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.

The government has declared that a hurricane is likely to hit the east coast. which government division is part of acf and provides guidance to citizens? a. job opportunities for low-income individuals b. office of human services emergency preparedness and response c. assets for independence d. low-income home energy assistance program