An airplane flies 2000 km with a constant speed of 1000 km/h and another 800 km with a constant speed of 800 km/h. How much time in total does it take to travel these distances

What type of light does this light bulb produce most (i.e. at what wavelength does the spectrum have maximum intensity)?

As a pendulum bob swings back and forth several times, the maximum height it reaches becomes less and less. this is because more and more of the pendulum bob's energy is being transformed into a. heat energy b. kinetic energy c. potential energy d. kinetic energy and potential energy

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above