PHYSICS MIDDLE SCHOOL

2. What characteristics does the domain Bacteria have

Answers

Answer 1
Answer:

Answer: Streptococcus.

Explanation:

The Bacteria and Archaea domains are prokaryotes, they contain no nuclues or organelles, only a circular chromosome. They cannot form multicells organisms. Archaea can be found in extreme evironments, such as hot springs and deep sea vents.

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If a rock is sitting in the dirt, the normal force from the ground and BLANK are acting on it plz help

Answers

The only other force acting on the rock would be gravity.
Gravity and ................? matter

Which organelle appears to be empty but is filled with liquid? A.cell membrane B.chloroplast C.vacuole D.ribosome. Help ASAP PLEASE

Answers

hey i learned this last week while we were making cell cakes its  c.vacuole
An organelle that appears to be empty but is filled with liquid is vacuole. So the answer is C because vacuole stores water and plant substances.

What occurs when an object travels in a curved path?

Answers

An object following any type of curved motion will necessarily be changing its direction as it moves. This change in direction constitutes a change in velocity, since velocity is a vector, and, thus, velocity has both a size, the speed, and a direction. So, if an object travels in a curved path, it changes velocity, and, thus, accelerates. This acceleration must be tied to a force. Newton's laws of motion explain this. Therefore, whenever an object travels in a curved path, there must be an unbalanced force acting upon it.

During which season is the sun highest in the sky? A.
spring

B.
summer

C.
fall

D.
winter

(this is science)

Answers

Answer: B.  summer

Explanation:

Seasons occur due to tilt of the Earth. Earth's axis is tilted 23.5° from the vertical. As the Earth revolves around the Sun, sometimes the Northern hemisphere points towards the Sun and sometimes away.

When the northern hemisphere points towards the Sun, Summer occurs and in the Southern hemisphere, winter occurs. In Summers, the Sun is highest in the sky and the sun rays fall directly. The duration of day time is greatest in summers. In winters, the Sun is lowest in the sky and sun rays fall obliquely.

summer i think because thats when its warmest

what does it mean for data to be reproducible? how would you conduct an experiment in such a way as to get data reproducible?

Answers

Answer:

Explanation:

If there are n number of groups in an activity and the data produced among them is copied or is same then it is termed as reproducible.

To have an experiment that gives a reproducible data there are few key points which we need to keep in mind.

1- The circumstances provided for every group should be same.

2- Each group must be selected in such a way that participants must have same set of thought processing and mind set toward the situation.
Reproducible is the term where your answers are similar to other groups. If every other group has similar results as yours (only if you use the same measurements) your results are reproducible. If your results are different to every other group your results aren't reproducible.  

A student has the following equipment - copper wire, nail made of iron,a battery, paperclips.How can he make an electromagnet and use it to separate a mixture of small pieces of copper and iron?

please help

Answers

The first step would be to create an electromagnet. You can create an electromagnet by winding a copper wire around the nail, the connect both ends to the battery. A current would start flowing around the nail through the wire, creating an electromagnet with its own magnetic field. Next, bringing the electromagnet to the mixture of copper and iron would slowly attract the pieces of iron (as copper is weakly magnetic). Do this slowly and the iron pieces would all slowly be separated from the copper pieces.
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