What is the impulse needed to stop a 45-kg boy who is running at 6 m/s in 3 seconds?

Asample of a gaseous substance changes into a liquid

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius

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?