When was the first airplane made?

What is the approximate radius of pluto

It takes 50 seconds for a wave with a wavelength of 0.2 m to travel past you. What is the frequency of the wave?

A piston-cylinder device contains 3 kg of saturated water vapor at 200 kPa. Now heat is transferred to the system at constant pressure until the temperature reaches 200oC. Calculate the work done by the steam during this process.

Mary spins a ball in a horizontal circle on a massless string. Karen has a similar ball but wants to spin hers faster. What could Karen do to make it easier to start spinning the mass from rest? A. Spin the ball on the moon B. Use a lighter ball C.

If a. 05 kg bullet is fired from a gun at 400m/s and hits a 1.3 kg block hanging from a sting. 8-meters long, determine how high the block rises from the equilibrium position

Explain why it's important that the alveoli is only 1 cell thick

A new cannon was being developed in a science lab. The instructor wanted to do some testing of the cannon's ability to launch objects with different masses. The instructor used tennis balls and filled them with lead, rocks, and styrofoam.

Which law is being demonstrated when a swimmer moves forward through the water?

A camcorder has a power rating of 16 watts. If the output voltage from its battery is 7 volts, what current does it use?

Electromagnetic waves with low frequencies have been used for long-distance underwater communication. These waves most likely belong to which of the following parts of the electromagnetic spectrum? A. gamma rays B. infrared waves C. radio waves D.