Which energy transformation occures on hairdryer?

How can you prove to be an initiator?

27b. You're in an airplane that flies horizontally with speed 1000 km/h (280 m/s) when an engine falls off. Ignore air resistance and assume it takes 30 s for the engine to hit the ground.

Most stars spend the majority of their lifetimes as which type of star? a. giant b. dwarf c. protostar d. main sequence user: a star's spectral class is related to which of these characteristics? select all that apply. a. mass b. radius c.

In which one of the following locations can a person hear the echo of a sound? a. At least 33.2 meters behind the reflecting surface b. Less than 16.6 meters in front of the reflecting surface c. Less than 33.2 meters behind the reflecting surface d.

How do plants and animals rely on each other to maintain the atmospheric oxygen and carbon dioxide content?

11) Shifting with ease from one type of problem-solving strategy to another is called a) flexibility b) versatility c) originality d) openmindedness

A truck undergoes a constant acceleration of 2.0 meters/second2 on a highway that slopes upward at an angle of 30.0° to the horizontal. What is the magnitude of the horizontal component of the acceleration?

Why is there so much more carbon dioxide in the atmosphere of Venus than in that of Earth? Why so much more carbon dioxide than on Mars?

People have proposed driving motors with the earth's magnetic field. This is possible in principle, but the small field means that unrealistically large currents are needed to produce noticeable torques.

A hot air ballon with a mass of 500kg ascends at a constant rate of 1.5 m/s for 20s. how much work is done by the upward force?