An elevator of mass 3000 kg is ascending at a steady speed of 2.0 m/s. What is the

force in the cable supporting the elevator?

How much thermal energy is created in the slope and the tube during the ascent of a 30-m-high, 120-m-long slope?

Amplitude is a Measure of a Waves A frequency B speed C Energy True or false How many wavelength as a given period of time is the definition of frequency A true B false

Is nuclear power a good or a bad idea and y

What we see as "moonlight" is really reflected sunlight. True or False?

Um automóvel é dirigido ao longo de uma estrada caracterizada por zonas alternadas de velocidades permitidas de 40km/h e 60km/h.

What is a radio interferometer? a device for correcting chromatic aberration in radio telescopes a device for absorbing and transmitting radio waves a network of several radio telescopes wired together a radio communication network joining several

In which galaxy is our solar system located? a. milky way b. ngc 4414 c. andromeda d. small magellanic cloud

Two astronauts, of masses 60 kg and 80 kg, are initially right next to each other and at rest in outer space. They suddenly push each other apart. How far has the heavier astronaut moved when the lighter astronaut has moved 12 m

A person suffering from anaemia gets tired

Jessica took a Mylar balloon outside on a very hot day. As she waited for the bus the balloon began to get bigger. What is the best explanation of this?