A model rocket with an initial mass of 3.0 kg is launched horizontally by burning and expelling 890 g of fuel with a velocity of 140 m/s. what is the velocity of the rocket after the fuel is expelled?

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?

Achild has maximum walking speed of 1.6 m/s. what is the length of the child's legs? 0.26 m

Diverging mirrors and lenses always produce images