Which of these events indicate that a chemical reaction might have occurred?

What name is used for scientists who study the weather in an area over a long time, such as 200 years? Hydrologists weather reporters climatologists balloon specialists

Each antibody can recognize how many types of invaders of the body? A. 1 B. 10 C. 100 D. 1,000

You need to move a 122-kg sofa to a different location in the room. It takes a force of 81 N to start it moving. What is the coefficient of static friction between the sofa and the carpet?

Question 3 10 pts If the resistance in a circuit is 125.0 2 and the current is 25.0 A, what is the voltage? A. 5.0 V B. 3125 V C. 0.20 V D. 150 V

4. A student throws a set of keys vertically upward to her sorority sister, who is in a window 4.00 m above. The second student catches the keys 1.50 s later.

Heat is conducted when one atom or molecule collides with and A. transfers energy to another atom or molecule. B. transfers mass to another atom or molecule. C. fuses with another atom or molecule. D.

What are the two rolls of decomposers in an ecosystem

A devout halloweener not only dressed as an astronaut, but travelled to the moon for the full experience. The astronaut jumps on the moon with an initial upward velocity of 2.98m/s. If the acceleration of gravity on the moon is - 1.

most of earth water a. contains salt b. is freshwater c. is frozen in glaciers d. is found underground

Kilogram definition