3 A Loaf Of Bread Of Volume 1500 Cm3 Having A Density Of 0 15 G Cm3 A What Is The Mass Of The Bread B If The Bread I 1 (42.17 KiB) Viewed 109 times
3 A Loaf Of Bread Of Volume 1500 Cm3 Having A Density Of 0 15 G Cm3 A What Is The Mass Of The Bread B If The Bread I 2 (57.46 KiB) Viewed 109 times
3. A loaf of bread of volume 1500 cm3 having a density of 0.15 g/cm3 a. What is the mass of the bread? b. If the bread is crushed in the bottom of a grocery bag into a volume of 3000.0 cm3. Calculate the density of the crushed bread. c. Is there a decrease or increase in density? What is the \% increase or decrease? 4. A man drove a truck at an average speed of 80.0 km/h for 2 hours. Then at an average speed of 90 km/h for 3 h, and finally at 75 km/h for 4 hours. What was his average speed for the entire trip in a. km/h b. m/s ? [ Use this conversion factor: 1 m/s=3.6 km/h ]
1. a. A bicycle and a rider have a combined mass of 75 kg. How many calories of heat are generated in the brakes when the bicycle comes to a stop from a speed of 5 m/s ? Take 4.18 J=1cal b. If all the energy is trapped in a 20 kg bag without any heat loss, how much will its temperature increase (ΔT)?c=0.200cal/g∘C. Answer to the nearest integer. c. What was the impulse on the bicycle and rider? 2. A 100 kg person who has been watching his weight mistakenly consumes an order of French fries ( 250 kilocalories) and wishes to work off the energy by climbing a 50.0 m vertical stairway. a. What is his potential energy as he climbs to the top of stairs? b. How many vertical climbs are needed to use ALL the energy consumed in the French fries? 1cal=4.18 J,g=9.8 m/s2.
Join a community of subject matter experts. Register for FREE to view solutions, replies, and use search function. Request answer by replying!