Which statement describes how rays behave when they travel through media during reflection and refraction

What three things happen when air is warmed? a) it expands b) it contracts c) it becomes lighter d) it becomes heavier e) it rises f) it sinks

A 0.95-kg sample of water at 11°C is in a calorimeter. You drop a piece of steel with a mass of 0.39 kg at 212°C into it.

Which of the following is an example of qualitative data?

What types of simple machines are in a bicycle

Your teacher walks outside the classroom to have a conversation with the principal. Unknown to the teacher, while she is outside the room, the sound waves are transmitted around the edge of the door and spread out on the other side and you can hear

How much helium gas would it take to fill a gas balloon with a volume of 11:0 cm3 when the temperature is 41.0◦c and the atmospheric pressure is 790 mm hg? answer in units of mol?

What is the wavelength of an earthquake wave if it has a speed of 7km/s and a frequency of 8hz

A shark is in the ocean trying to catch fish. If the shark swims to the right for 30 meters, then swims to the left for 15 meters, and them swims back to the right for 50 meters. What is the shark's displacement?

When two hydrogen nuclei combine to form one helium nucleus, nuclear fusion has taken place. true or false

A rock is thrown off a cliff at an angle of 57° above the horizontal. the cliff is 135 m high. the initial speed of the rock is 24 m/s. (assume the height of the thrower is negligible.