Calculate the average speed (in km/hr) of Charlie whonruns to the store 4 km away in 30 minutes

69. A grating with lines uniformly spaced at 775 nm is illuminated by a sodium discharge lamp. For what range of wavelength will there only be three principal lines generated?

Helium atoms emit light at several wavelengths. Light from a helium lamp illuminates a diffraction grating and is observed on a screen 50.00 cm behind the grating. The emission at wavelength 501.5 nm creates a first-order bright fringe 21.

Which one of the following statements does not accurately describe the diatonic scale as it corresponds to the setup on a piano keyboard? A. The white keys are used to produce frequencies for the key of C. B.

Mr. Harden's class decides to perform an experiment to determine how long it takes different objects to hit the floor when dropped from a desk.

An automobile engine develops a torque of 280 NxM at 3800 rpm. What is the power in watts and horsepower?

Which equation best expresses the first law of thermodynamics, assuming Q is heat, U is internal energy, and W is work? A.ΔW = ΔQ + ΔU B.ΔW = ΔU - ΔQ C.ΔQ = ΔU+W D.ΔU=Q - W

Why are the action and reaction forces described by Newton's third law of motion excluded in the free-body diagram of an object?

The small depression inside the bend of the elbow is the

If r = KL/d2 find L to the nearest tenth foot if r = 2.5 ohms, k = 10.8 and = 85 mil

A 1500 kg car accelerates uniformly from rest to reach 10.0 m sin 5.00 s. Determine (i) the average power delivered by the engine.