Which has more thermal energy, 1 kg of aluminum at 20°c or 1 kg of gold at 20°c

Which part of the electromagnetic spectrum has a wavelength shorter than the color of the visible light spectrum

What observations characterize solar maximum?

An object is hanging from a rope. When it is held in air the tension in the rope is 8.86 N, and when it is submerged in water the tension is 7.84 N. What is the density of the the object

If the wavelength is changed to λ/2, does the central spot remain bright, does the central spot become dark, or do the fringes disappear? Assume the fringes are viewed by a detector sensitive to both wavelengths.

A duck floating on a lake oscillates up and down5.0 times during a 10.-second interval as aperiodic wave passes by. what is the frequencyof the duck's oscillations? (1) 0.10 hz (3) 2.0 hz (2) 0.50 hz (4) 50. hz

A CFL bulb has an efficiency of 8.9% and a power of 22 W. How much light energy does the lightbulb produce in 1 second

Which of the following is true of high clouds?

A ferris wheel takes 5 minutes to complete one full rotation, what is the angular velocity of the ferris wheel

A heat engine has a thermal efficiency of 45%. how much power does the engine produce when heat is transferred into it at a rate of 109 kj/hr?

Dos pelotas de tenis se lanzan verticalmente, hacia arriba y desde el mismo punto, con 2 s de diferencia. La velocidad inicial de la primera es de 20 m/s, y la de la segunda, de 30 m/s.