A gasoline pump fills a 80 L tank in 1 min 15 s. If the pump exit diameter is 4 cm, determine the average pump flow exit velocity.

Problem- Cargo ships can cause a lot of air pollution.Solution-  to use nuclear powered ships since they hold a lot of energy and can travel for long distances. How it will work is that it will need a nuclear reactor at the bottom of the boat to heat up the water and then turn it to electricity to power the boat. The boat will be made out of graphene which is a tough material to avoid any leaks in the boat. It will also contain many control rods because nuclear power is so powerful that it can create to much energy to handle. With control rods, you can slow down this process and keep it in a controlled manner. Since cargo ships are already is the ocean, there will be no need for any extra materials to make it work. -Do you think this will work? Why/Why not?  -What do you think is wrong with it/ How can this be improved? Please send this to someone else I need to record 50 responses for a science project. Thank you!

Why is your Reynold's number 1400 instead of 2300?

Answer all or else skip the question please

A block weighing 2 KN is being dragged along a rough horizontal plane by a force P= 500N. The line of the force P makes an angle of 12 degrees above the horizontal plane. Coefficient of friction is 0.10. A. Compute the velocity of the block when it has travelled a distance of 5 m from rest. B. Compute the acceleration of the block C. Compute the velocity of the block 2 second after it moves from rest.