a 45kg box of books is lifted o a bookself 1.75 m above the floor. how much work was done to lift the books?

What are 3 types of archaea?

What is a difference between the magnetic fields of a regular bar magnet and an electromagnet? A. A bar magnet's field is temporary, but an electromagnet's is permanent. B. A bar magnet's field is permanent, but an electromagnet's is temporary. C.

Why does wifi bounce off walls instead of passing through

Drake travel 1000m south and then 1200m west

If you push down a table with a force of 5 newtons, what is the normal force pushing back on you

You create a transformer by wrapping wire around an iron nail. The number of turns are: Primary (500); Secondary (2500). The Primary voltage is 3.00 V. The Secondary current is 200 mA.

A 90kg cannon fires 100kg shell with muzzle velocity of 75m/s. Calculate the recoil velocity of the cannon relative to the ground

The planet XYZ traveling about the star ABC in a circular orbit takes 24 hours to make an orbit. Assume that the orbit is a circle with radius 89 comma 000 comma 00089,000,000 mi. Find the linear speed of XYZ in miles per hour.

Your heart pumps 80 g of blood with each beat. The blood starts from rest and reaches a speed of 0.60 m/s in the aorta. If each beat takes 0.16 s, the average force exerted on the blood is a. 3.0" 102 N b. 0.22 N c. 0.16 N d. 0.30 N e. 0.98 N

What is the formula for calculating the mass when i have the number of volume and density