PHYSICS HIGH SCHOOL

What is the distance an object would be from Earth if its parallax were one arcsecond?a. a parsec
b. a light-year
c. an arcminute
d. an angular diameter

Answers

Answer 1
Answer: The correct answer is (a.) a parsec. A parsec is a distance an object would be from Earth if its parallax were one arcsecond. This unit of measurement is usually used in astronomy which makes it easier for astronomers to calculate or measure in space accurately. 

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At a constant temperature, what will happen to the pressure inside a container of gas if the volume of the container is reduced?a. The pressure will increase.
b. The pressure will decrease.
c. The pressure will remain constant.

Answers

A. Because its now a smaller container with the same amount of gas

Which of the following industries has not seen an increase in hazardous waste production?a. medical
b. food
c. energy
d. electronics

Answers

The correct answer is letter b. food. The food industries has not seen an increase in hazardous waste production. Medical, energy and electronics' waste production are mostly hazardous. These hazardous material are dangerous to the environment and as well to our health.

Answer:

food

Explanation:

When using science to investigate physical phenomena, which characteristic of the event must exist?predictable
observable
provable
readable

Answers

In my opinion, the correct answer from the choices listed above would be the second option. When using science to investigate physical phenomena, the event should be observable. Hope this answers the question. Have a nice day. Feel free to ask more questions.

The answer is:

When using science to investigate physical phenomena, observable  must exist.

The explanation:

In physics, an observable is a dynamic variable that can be measured. Examples include position and momentum. ... In quantum physics, it is an operator, or gauge, where the property of the system state can be determined by some sequence of physical operations.

What is an object's change in position, or displacement, and the change in time over which that displacement occurred used to calculate?a. average velocity
b. inertia
c. average force
d. force of gravity

Answers

the answer is a  average velocity

A tortoise is walking in the desert. It walks6.4 meters in
4 minutes. What is its speed?

Answers


It's speed is exactly 6.4 meters per 4 minutes.

In the more familiar units, that's

       (6.4 m / 4 min) = 1.6 meters per minute

(1.6 m / min) (100 cm/m) ( 1 min / 60 sec)  =  2-2/3 cm per sec.

                                                                       (1.05 inch per second, rounded)

                                                                       (160.3 furlongs per fortnight, rounded)

The speed of the tortoise can be calculate as follows:

v=(S)/(t)

where

S is the distance travelled by the tortoise

t is the time taken


In this problem, S=6.4 m, while we should convert the time into seconds:

t=4 min= 4\cdot 60 =240 s


Substituting the numbers into the equation, we find the speed:

v=(S)/(t)=(6.4 m)/(240 s)=0.027 m/s

A net force of 200 newtons is applied to a wagon for 3 seconds. This cause the wagons to undergo a change in momentum of ?

Answers

physics- damon, Monday, December 1, 2014 at 3:27 pm force =change in momentum\ change in time or m a if m is constant 

change in momentum/3=200

change in momentum =3*200 kg m/s
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