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?

Rubber is which of the following? conductor electric field insulator electric charge

An air-track cart with mass m1=0.31kg and initial speed v0=0.90m/s collides with and sticks to a second cart that is at rest initially. if the mass of the second cart is m2=0.50kg, how much kinetic energy is lost as a result of the collision?

Which of the following is a typical product of nuclear fission? a. oxygen b. carbon dioxide c. radiation d. water

What causes the rider on a roller coaster to experience the + or - g's if gravity always remains the same on earth

What is the mass of an object that needs a force of 6000 newtons to increase its speed from rest to 107 m/s in 2.3 seconds?

Convert 4,200 decigrams to grams

A beam of light is incident upon a flat piece of glass (n = 1.50) at an angle of incidence of 30.00. Part of the beam is transmitted and part is reflected. Determine the angle between the reflected and transmitted rays

A 29 foot ladder leans against a building so that the angle between the ground and the ladder is 75 ∘. How high does the ladder reach up the side of the building? Round to 2 decimal places.

What is a difference between an isotope and a ion

2. An airplane travels 335 miles in 45 minutes. How fast does it travel? How fast is that in km/hr?