A 37.8 kg child is standing on a scale in an elevator.Determine the reading on the scale if the elevator is accelerating upwards at 4.1om/s^2

A textbook with a mass of 2.18 kg is pulled across a table with a horizontal force of 5.5 N [E]. If the table has a coefficient of friction of 0.15, what is the acceleration of the textbook?

 1.     What mass of ethane is required to produce 1500 kJ of energy during a combustion reaction?  The molar enthalpy of combustion of ethane is -1251.0 kJ/mol.

I need help with checking and writing my critical essay 

Find the displacement of a soccer player who runs 15 m [15° N of E] and then 13 m [5° W of N].

The side length of the gazebo's base is the same as a side length of the outer surface of the gazebo's roof. If the roof is 1.5 m tall, what angle is formed at the top of each triangular section of the roof?

Is the strength of a country best achieved through its citizens

a rabbit running at 12m/s runs past a dog who immediately gives chase. if the dog accelerates at 2.40m/s^2 and both run in a straight line, how long til the dog catches the rabbit?

Two oppositely charged parallel plates are 20.0 cm apart and have an electric field strength of 82000N/C. If an electron is placed halfway between the plates, what is the speed that it reaches the positive plate?