Franc rolled a toy car down a ramp and timed how long it took for the car to reach the bottom of the ramp. After one trial, the student doubled the height of the ramp and added sandpaper to surface of the ramp. He conducted three more trials. After reviewing the data, the student concluded the height of the ramp had no effect on the speed that the car traveled. Which is the most likely reason his conclusion is flawed?

Phase changes are chemical changes. true or false

Two conductors, a and b, are each in the shape of a tetrahedron. but of different sizes. they are charged in the following manner: 1. tetrahedron a is charged from an electrostatic generator to charge q. 2. tetrahedron a is briefly touched to tetrahedron b. 3. steps 1 and 2 are repeated until the charge on tetrahedron b reaches a maximum value. if the charge on tetrahedron b was q/4 after the first time it touched tetrahedron a. what is the final charge qbmax on tetrahedron b?

Which of the following is the best name for mgcl2