A book has four forces acting on it. The upward normal force is 40 N. The downward gravitational force is 40 N. The application force to the right is 44 N. The force of friction to the left is 28 N. Which statement below is accurate? Choose all that apply.

Question 10 options:

The forces up and down are balanced.

The forces up and down are unbalanced.

The forces right and left are unbalanced.

The forces right and left are balanced.

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.