1) A ball has a mass of 1.5 kg. What is the net force on the ball if its acceleration is 55 m/s2? 2) The density of aluminum is 2.70 g/cm3. A piece of aluminum foil has a volume of 54 cm2. What is the mass of this piece of aluminum? 3) Sound travels at a speed of 330 m/s. If Pablo hears a police siren 165 meters away, how long did it take for the sound to travel from the police siren to his ear? 4) If a bowling ball with a mass of 4.5 kg is dropped from a height of 16 m, how much work does gravity do on the bowling ball? 5) A car travels a total of 240 km in 3 hours. What is its average speed? Simplify. Your answers should contain only positive exponents. 1) (−2𝑚5 𝑛0 )(2𝑚0 𝑛4 )0 2) (−2𝑥𝑦 5 )(𝑦𝑥 2 )3 3) (−𝑢−5 𝑣 5 )4 (2𝑢2 𝑣 −5 ) 4) (2𝑏𝑎4 )5 (𝑎−3 𝑏 2 )(2𝑏𝑎5 ) 2 5) ((−2𝑥 4 )(𝑥 −4 𝑦 5 ))