PHYSICS MIDDLE SCHOOL

emma runs around the track. she has a constant speed of 5m/s at the beginning of the track as well as 5m/s near of the track. did emma accelerate during her runs? explain.

Answers

Answer 1
Answer: •The statement "Emma runs around the track" hints that it is a circular track thus doing circular motion with a constant speed
the velocity at every interval of time changes, thus Emma is accelerating during her motion around the track

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HIGH SCHOOL

It is a cold night around the campfire. Megan is trying to get warm by sitting close to the fire and clutching her mug of hot chocolate. How is heat being transferred to chilly Megan?

Answers

The heat of the fire is warming her skin by making the air hot while drinking the hot chocolate warms her from inside of her

Answer:

It is being transferred by radiation.

Radiation is when things are transferred to you not by touch, but by nearby energy.

MIDDLE SCHOOL

A machine is classified as a compound machine if it A. has moving parts
B. has an IMA greater than 1
C. is made up of two or more simple machines that operate together
D. is very efficient ​

Answers

Answer:

The correct option is: A machine is classified as a compound machine if it C. is made up of two or more simple machines that operate together.

Explanation:

Composite machines are mechanical devices that have been formed from two or more simpler machines which are connected in series. In this way, when one of these parts of the composite machine is activated, the rest work in a coordinated manner, being able to offer together a function that individually could not.

Composite machines have operators that work in coordination. These operators can be:

  • Mechanical operators : They are the elements that allow the operation of the machine turning the force into movement. This set is what is called a mechanism.
  • Energy operators: are responsible for storing energy or force and transform it into another type so that the device can be activated and perform its function.

In short, the correct option is: A machine is classified as a compound machine if it C. is made up of two or more simple machines that operate together.

the answer is very clearly C.

a common example is scissors

HIGH SCHOOL

Sources of natural gas include all of the following except: flyash oil wells biomass landfills

Answers

Answer: Flyash

Explanation:

Flyash is a waste produced after the combustion of the coal in a power plant. The ash is in the form of small dark flakes.

The natural gas is a fuel which is produced by the degradation and decomposition of the organic matter generated from plant and animal matter. The following are the sources of the natural gas: oils, wells, biomass and landfill as they are sources of deposited organic matter. But flyash contains very less organic content.

Idk the answer but goodluck
MIDDLE SCHOOL

This equation is known as the ideal gas law, and it can be used to predict the behavior of many gases at relatively low pressure. From this equation, you can see that as the temperature of a gas increases, A) the pressure of the gas increases.
B) the number of moles of gas will go down.
C) either the pressure of the gas, the volume of the gas, or both, will increase.
D) either the pressure of the gas, the volume of the gas, or both, will decrease.

Answers

The correct answer is 
C) either the pressure of the gas, the volume of the gas, or both, will increase.

In fact, the ideal gas law can be written as

where 
p is the gas pressure
V is its volume
n is the number of moles
R is the gas constant
T is the absolute temperature of the gas

We can see that if the temperature T increases, then the term on the right in the equation increases, therefore the term on the left should increase as well. In order for this to be possible, at least one between p and V should increase, or also both of them. Therefore, the correct answer is C.

Answer:

C)  either the pressure of the gas, the volume of the gas, or both, will increase.

Explanation:

you are right took the test

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