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1. The 9th term of an arithmetic sequence is 59 and the 13th is 87. What is the initial term of this sequence

1. What is momentum?

Grayson is deciding between two parking garages. Garage A charges an initial fee of $8 to park plus $1.50 per hour. Garage B charges an initial fee of $4 to park plus $2.50 per hour. Let A represent the amount Garage A would charge if Grayson parks for t hours, and let B represent the amount Garage B would charge if Grayson parks for t hours. Graph each function and determine which garage would be cheaper if Grayson needs to park for 6 hours.

1. Calculate the quantity of heat energy which must be transferred to 2.25 kg of brass to 
raise its temperature from 20 ℃ to 240 ℃ if the specific heat of brass is 394 J.kg-K.

2. Find the change in temperature produced by 10 kJ of heat energy added to 500 g 
copper. Specific heat of copper 0.39 kJ/kg-K.

3. Explain why, for a gas, the specific heat at constant volume has a different value 
from the specific heat at constant pressure.
An ideal gas is contained in a cylinder fitted with a piston. Initially the temperature of the 
gas is 15℃. If the mass of the gas is 0.035 kg, calculate the quantity of heat energy 
required to raise the temperature of the gas to 150 ℃ when:
(a) The piston is fixed;
(b) The piston moves and the pressure is constant.
For the gas, 𝑐𝑣 = 676 J/kg-K and 𝑐𝑝 = 925 J/kg-K.

Chemical formula of bleaching powder?