Suppose that the engine of a 1,600 kg automobile has a maximum power output of 40 hp. What is the maximum grade (in percent) that the automobile can climb at 45 km/h if the drag force on it is 370 N

The freezing and boiling point of a substance changes as the air pressure around it changes. for example, at a lower air pressure (higher altitude) it is easier for water molecules to escape from liquid into the air. in a high altitude city such as denver, colorado compared to a sea-level city such as houston, texas, water

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.

What is friction? how does it affect the motion of an object?