The main light gathering device of a refractor telescope is

If a water wave completes one cycle in 2 seconds, what is the period of the wave? A. 0.5 seconds B. 4 seconds C. 2 seconds D. 0.2 seconds

Under which atmospheric conditions will water most likely evaporate at the fastest rate?

Which o the following phrases bet describes a physical model? A. An exact copy of an object, system, or process B. A chemical formula C. A graph or equation D. A representation of an object, system, or process

A coin of mass 0.01 kg is placed a distance 5 cm from the center of a phonograph turntable. The coefficient of static friction is 0.25. The rotational speed ⍵ of the turntable is slowly increased until the coin slides off.

A ball is thrown in the air at an angle of 40∘. If the maximum height it reaches is 10m, what must be its initial speed?

Which of the following objects would have the most inertia? A. A sphere with a radius of 5 cm and a mass of 34 grams. B. A sphere with a radius of 4 cm and a mass of 15 grams. C. A sphere with a radius of 8 cm and a mass of 27 grams. D.

A boy slides a book across the floor using a force of five and over a distance of 2M what is the kinetic energy of the book after he slides at assume there is no friction

Where would aliens be if they really do exist here on Earth?

If the mass of an object is 84g and the volume is 12cm3 what is the density

Describe one example of competiton of tropical dry forest