Many people choose to buy expensive low energy lamps instead of cheaper filament lamps. Give two reasons for this

It will be easier to push a sofa across a rough surface like carpet and a smooth surface like a hardwood floor. Truue or False?

if an object moves in a circle at a constant speed, its velocity vector will be constant true or false

According to Erik Erikson's psychosocial theory of personality, which stage occurs during adolescence?

Geologists cannot yet predict earthquakes because

Transmission Lines and Health. Currents in dc transmission lines can be 100 A or higher. Some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers.

A wave has a wavelength of 10 mm and a frequency of 5 hertz. What is its speed? a. 50 mm/s b. 50 hertz's c. 2 mms d. 0 0.50 mms

Suppose you illuminate two thin slits by monochromatic coherent light in air and find that they produce their first interference minima at / pm 35.09 degrees on either side of the central bright spot.

Tala wants to create a sound echo. She can create the echo using a pane of glass or a carpet square. Which one does she choose? Explain.

a the average distance from the Sun to Pluto is approximately 6.10 x 1 0 ^9. how long does it take light from the sun to reach Pluto?

A 25kg object moves from left to right at a speed of 30km/h. What net force is required to keep this object moving in a straight line at constant speed