PHYSICS HIGH SCHOOL

A scientific law is based on repeated inferences made over long periods of time.

Answers

Answer 1

Answer: A scientific law is based on repeated inferences made over long periods of time.
TRUE

Answer 2

Answer:

Answer:

False

Explanation:

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Einstein's famous equation indicates that E=mc^2, where c is the speed of light and m is the object's mass. Given this, what is the SI unit for E?

Answers

Answer: Joules

Explanation:

Einstein's equation is:

$E=mc^(2)$

Where:

$E$ is the energy

$m$ is the mass and its SI unit is kilogram $kg$

$c$ is the speed of light and its SI unit is meters per second $(m)/(s)$

If we input the units in the equation and make the analysis of the units:

$E=kg{((m)/(s))}^(2)=kg (m^(2))/(s^(2))$

Rearranging the units:

$E=kg (m)/(s^(2))m$

As we know 1 Newton is $1 N=kg (m)/(s^(2))$

$E=Nm$

And 1 Joule is $1J=Nm$

$E=J$ This is correct because the Joule is the SI unit for energy

Define escape velocity?

Answers

escape velocity is the minimum velocity required for an object to come out of the gravity of earth or any planet !

for earth , it is 11.2 km/sec

QUESTIONS When parking uphill in a car with a manual transmission, you should park with the transmission in A: Neutral. B: Any gear. C: First gear.

Answers

Answer:

option C first gear

Explanation:

we know car is parking in uphill

so is we park park on neutral it will free move that is damage car

so we park car on uphill in first gear and turn wheel away from kerb

and park car on downhill in reverse gear and turn wheel toward kerb

so any gear may be reverse or first

so correct option is C first gear

What is the definition for distance?

Answers

distance is an amount of space between two things or people

If you travel at 3 m/s for 12 seconds, how far did you travel?

Answers

Answer:

$\boxed {\tt 36 \ meters }$

Explanation:

We want to find how far was traveled, or the distance.

The formula for distance is:

$d=s*t$

where $s$ is the speed and $t$ is the time.

The speed is 3 meters per second and the time is 12 seconds.

$s= 3 \ m/s \nt= 12 \ s$

Substitute the values into the formula.

$d= 3 \ m/s * 12 \ s$

Multiply. Note that when multiply, the seconds, or $s$ will cancel.

$d= 3 \ m * 12$

$d= 36 \ m$

$d= 36 \ meters$

The distance traveled was 36 meters.

Answer:

V=3 m/s

t=12 seconds

S=?

S=V×t

S=3×12

S=36meters

So distance you travel is 36meters.

A student lifts a set of books off a table and places them in the upper shelf of a book case which is 2 meters above the table. If she applies a force of 5 newtons to lift these books, what is the work done?

Answers

10 joules of work done

Answer:

the awnser is D

Explanation:

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