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Physics Final Exam

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Questions and Answers

Explain the concept of significant figures.

Significant figures are the digits in a number that carry meaning regarding the precision of the measurement.

State the rules for determining significant figures.

All non-zero digits are significant. 2. Zeros between non-zero digits are significant. 3. Leading zeros are not significant. 4. Trailing zeros in a number with a decimal point are significant.

Explain the concept of equilibrium.

Equilibrium is a state in which the net force and net torque acting on an object are both zero.

Describe the conditions of equilibrium.

<ol> <li>The vector sum of all forces acting on the object is zero (ΣF = 0). 2. The sum of all torques acting on the object is zero (Στ = 0).</li> </ol> Signup and view all the answers

Explain the concept of renewable and non-renewable sources of energy.

Renewable sources of energy are those that can be replenished naturally, such as solar and wind energy. Non-renewable sources are finite and cannot be easily replaced, like fossil fuels. Signup and view all the answers