Chemistry, 10.11.2019 20:31 nika0001

Someone may you me with two questions !

which example below of light behavior best matches the behavior of a sound wave when you hear an echo?

question 16 options:

a pencil looking bent in a glass of water.

a person looking in the mirror

light waves bending when the move from the air into the water

a light wave heating a roof.

second question is a speaker was giving a speech to a class of students. the sound waves present are diagrammed below:

what best explains what happened to sound wave a?

question 15 options:

the sound wave was absorbed by the yellow material on the wall.

the sound wave stopped and transmitted.

the sound wave was reflected to the students.

the sound wave was absorbed by the air molecules.

picture if for part 2

Someone may you me with two questions ! which example below of light behavior b

Answers: 3

Show answers

Another question on Chemistry

Chemistry, 22.06.2019 19:00

What information does a complete ionic equation give that the balanced equation doesn’t show?

Answers: 1

Answer

Chemistry, 23.06.2019 03:00

In november 1987, a massive iceberg broke loose from the antartic ice mass and floated free in the ocean. the chunk of ice was estimated to be 98 mi long, 25 mi wide, and 750 ft thick. a typical backyard swimming pool contains about 24,000 gallons of water. how many of these pools could you fill from the water in this iceberg? (assume the iceberg is a rectangular solid of the above dimensions and consists of water only). express answer in scientific notation.

Answers: 1

Answer

Chemistry, 23.06.2019 08:00

The goal of this experiment was to answer the question "what is the effect of a gas' temperature on its volume? " you formulated the hypothesis below. hypothesis: if a fixed amount of gas is heated, then the volume will increase because the heat will cause the molecules of gas to move faster and further apart. to test this hypothesis, you changed the of the gas between 0 and 100°c (273 and 373 k) and calculated the resulting of the gas.

Answers: 2

Answer

Chemistry, 23.06.2019 14:50

Use the bond energies provided to estimate δh°rxn for the reaction below. ch3oh(l) + 2 o2(g) → co2(g) + 2 h2o(g) δh°rxn = ? bond bond energy (kj/mol) c-h 414 c-o 360 c=o 799 o=o 498 o-h 464 use the bond energies provided to estimate δh°rxn for the reaction below. ch3oh(l) + 2 o2(g) → co2(g) + 2 h2o(g) δh°rxn = ? bond bond energy (kj/mol) c-h 414 c-o 360 c=o 799 o=o 498 o-h 464 +473 kj +206 kj -392 kj -91 kj -486 kj

Answers: 1

Answer

You know the right answer?

Someone may you me with two questions !

which example below of light behavior best ma...

Questions