John is considering moving house in 5 years. Should he invest in draught excluders which will save him £4 per year on bills and cost £12 to buy?

The system is released from rest with the cable taut, and the homogeneous cylinder does not slip on the rough incline. determine the angular acceleration of the cylinder and the minimum coeffi cient s of friction for which the cylinder will not slip.

How does an observation about an object differ from an inference about that object

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical