Two metallic rod of the same material but of different length are heated. smaller rod has
circular area of cross-section but larger rod has rectangular cross-section. will their linear expansivity be the
same or different? give justification of your answer.

Four objects are being tested to see how they are affected by fluid friction. object w has a surface area of 4.5 cm2, object x has a surface area of 2.5 cm2, object y has a surface area of 6.2 cm2, and object z has a surface area of 3 cm2. which object would experience the most fluid friction?

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

The table below shows the acceleration of gravity on different bodies in the solar system. on which body would a 10 kg lamp has the most gravitational potential energy when lifted to a height of 2 m? a. earth b. mars c. neptune d. uranus