Which of these is a source for particulate matter in the air?

a. automobiles

b. dust

c. fires

d. all of the above

3. Source 2 demonstrates the division in Congress into two as outlined in which document A the Bill of Rights B. the Virginia Plan C the New Jersey Plan D the Great Compromise

What is the medium that sounds waves travel through when a person speaks

A moving walkway has a speed of 0.9 m/s to the east. A stationary observer sees a man walking on the walkway with a velocity of 1.1 m/s to the east. What is the man's velocity relative to the moving walkway? A. 0.2 m/s west B. 0.2 m/s east C. 1.

Why does light look colorless and how is made (I know this just Wana see if anyone will get it correct)

If the coefficient of kinetic friction between the puck and the ice is 0.05, how far does the puck slide before coming to rest? solve this problem using conservation of energy.

How do most primary producers make their own food?

The maximum kinetic energy of photoelectrons is 3.10 ev. when the wavelength of the light is increased by 50%, the maximum energy decreases to 1.50 ev. part a what is the work function of the cathode?

Which of the following most completely describes an objects motion? A. a car travels 25 miles. B. The baby crawls 10 feet in 15 seconds toward the door. C. A marble rolls 10 m to the left D. The rain falls at a rate of one inch per hour

Why is the use of carbon-14 limited

Why do cell sometimes need to use active transport?