All materials are made up of elements. Which of the following best describes elements?

A.
Mixtures combine in several different ways to make many kinds of elements.
B.
Compounds combine in several different ways to make a limited number of elements.
C.
Elements combine in several different ways to make many kinds of compounds.
D.
Elements are unable to combine in order to make different compounds.

STUDY ISLAND

Trumpeter a holds a b-flat note on the trumpet for a long time. person c is running towards the trumpeter at a constant velocity. person b is running away from the trumpeter at the same rate. person d is standing still the whole time. which person hears a frequency that is lower than the b-flat?

Thomas his older brothers, who own a junk yard, on the weekends to earn extra money. he likes to them push broken-down cars to the back of the junk yard because it makes him feel strong. last saturday, they pushed three cars with different weights, and he noticed he used different amounts of force for each one. the cars were the following weights: white car: 2,700 kg red car: 1,500 kg blue car: 2,100 kg think about how much force is needed to move each car. which correctly lists the cars in order from the most to least amount of force needed to move them? a) white, blue, red b) blue, red, white c) red, white, blue d) white, red, blue

How do you tell if someone actually cares about you? and just say they do?