Physics Semester Exam

Front

What are significant figures?

Back

Significant figures are the digits in a number that contribute to its precision. This includes all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion.

Front

How do you determine the number of significant figures in a sum?

Back

In addition, the result should be rounded to the least number of decimal places of any number in the sum.

Front

What is the rule for significant figures in multiplication and division?

Back

In multiplication and division, the result should have the same number of significant figures as the measurement with the least number of significant figures.

Front

What is inertia?

Back

Inertia is the resistance of an object to any change in its state of motion, including changes to its speed or direction.

Front

How does inertia affect an automobile's fuel efficiency?

Back

An automobile with less inertia requires less energy to change its speed, which can lead to better fuel efficiency.

Front

What is the formula for speed?

Back

Speed is calculated as distance divided by time (Speed = Distance / Time).

Front

How do you convert miles to miles per second?

Back

To convert miles to miles per second, divide the total distance in miles by the total time in seconds.

Front

What is tension in physics?

Back

Tension is the force exerted by a rope or string when it is pulled tight by forces acting from opposite ends.

Front

How do you calculate the weight of an object on a scaffold supported by ropes?

Back

The weight of the object is equal to the sum of the tensions in the ropes minus the weight of the object itself.

Front

What is the relationship between mass and weight?

Back

Weight is the force exerted by gravity on an object, calculated as Weight = Mass x Gravity (W = mg).