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A book is sitting on a desk. What best describes the normal force acting on the book?

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents

If a substance is in the gas phase, which of qualities of the gas will stay constant? a: volume b: mass c: shape d: position of particles