1 During a dass activity, Hashim walks 20 m due east. He reverses his direction and walks 12 m. After that,
he reverses his direction again and walk for another
10 m. If the total time taken is 30 s, what is his
speed and velocity?​

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.