Which of these best describe the chemical composition of asteroids? select all that apply.

a. ice

b. silicate

c. hydrogen

d. carbon-based

Electric fields are produced by electrically charged particles and by changing

The maximum pressure variations the human ear can withstand are about how much above and below atmospheric pressure?

If an object is violet, what wavelengths of light are being absorbed by the object? All wavelengths but violet Violet Black White

An electric bulb draws a current of 0.8A from 250 V mains. The bulb is used on an average 8 hours a day, If energy costs Rs 3 per kWh, calculate the monthly bill for 30 days.

A person touches a large chunk of ice with their hand and remarks, "This is making me cold." Explain what this person is feeling. Is the ice transferring "cold" to the person? Is there a heat transfer occurring? Explain.

Which planet, when viewed through a telescope, appears as a reddish ball interrupted by some permanent dark regions that change intensity?

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?