An airplane whose airspeed is 225 km/h flies parallel to the direction of a head wind with a speed of 40 km/h. What is the resultant speed of the plane relative to the
ground?

With i really need the correct answer!

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

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