Johnny noticed that some of the footballs his team used during practice were not fully inflated. He wondered
whether fully inflated footballs would travel farther than footballs with a lower air pressure.
To find out, Johnny collected 20 standard footballs. He fully inflated ten of them to an air pressure of 13 pounds
per square inch. He inflated the remaining ten to an air pressure of 10 pounds per square inch. Johnny used a
football launcher to launch a ball across a football field. He measured the distance the football traveled and then
launched the next ball. Johnny repeated this with all 20 balls.
•What is his independent variable?
•What is his dependent variable?
•What is his control?
Answers: 3
Other questions on the subject: Chemistry
Chemistry, 21.06.2019 20:30, mayamabjishovrvq9
1. calculate the approximate enthalpy of the reaction in joules. estimate that 1.0 ml of vinegar has the same thermal mass as 1.0 ml of water. iqnore the thermal mass of th sodium bicarbonate. note: it takes about 4.2 joules () to change 1.0 gram (1.0ml) of water 1.0 c
Answers: 2
Chemistry, 22.06.2019 18:00, kingamir
Answer asap need it by wednesday morning carry out the following calculations on ph and ka of from data. i. calculate the ph of 0.02m hcl ii. calculate the ph of 0.036m naoh iii. calculate the ph of 0.36m ca(oh)2 iv. calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 v. calculate ka for weak acid ha which has a ph of 3.65 at 0.30m concentration vi. calculate the ka of a solution made by mixing 15.0 cm3 0.2m ha and 60.0 cm3 0.31m a-. [ph= 3.80] vii. calculate the ph of a solution made by mixing 15.0 cm3 0.1m naoh and 35.0 cm3 0.2m hcooh. [ka = 1.82 x 10-4 m]
Answers: 1
Do you know the correct answer?
Johnny noticed that some of the footballs his team used during practice were not fully inflated. He...
Questions in other subjects:
History, 15.06.2020 05:57
Mathematics, 15.06.2020 05:57
