Using Standard Form in Physics Calculations

What is the main advantage of using standard form for large and small numbers?

• It changes the units of measurement.

• It increases the number of significant figures.

• It simplifies calculations by reducing the number of zeros.

• It makes numbers look more complex.

How do you convert a small number like 0.00000045 to standard form?

• Add zeros to the number and increase the power of 10.

• Move the decimal point to the right and decrease the power of 10.

• Subtract zeros from the number and decrease the power of 10.

• Move the decimal point to the left and increase the power of 10.

What is the standard form of the density of mercury, 13,600 kg/m³?

• 1.36 * 10^5

• 1.36 * 10^4

• 1.36 * 10^6

• 1.36 * 10^3

When converting a large number to standard form, what happens to the power of 10 each time the decimal point is moved to the left?

• The power of 10 is multiplied by 2.

• The power of 10 remains the same.

• The power of 10 increases by 1.

• The power of 10 decreases by 1.

How do you combine powers of 10 when multiplying two numbers in standard form?

• Subtract the indices.

• Multiply the indices.

• Divide the indices.

• Add the indices.

What is the standard form of 0.036 watts?

• 3.6 * 10^-1

• 3.6 * 10^-2

• 3.6 * 10^-3

• 3.6 * 10^-4

How many seconds are there in 24 hours?

• 86,400 seconds

• 8,640 seconds

• 864 seconds

• 86 seconds

What is the energy transferred by an LED in 24 hours if its power is 0.036 watts?

• 31.104 joules

• 3.1104 joules

• 311.04 joules

• 3110.4 joules

What is the final step in converting a number to standard form?

• Move the decimal point to the right.

• Add zeros to the number.

• Move the decimal point to the left.

• Adjust the power of 10 to compensate for the decimal movement.

What is the standard form of 86,400 seconds?

• 8.64 * 10^4

• 8.64 * 10^5

• 8.64 * 10^3

• 8.64 * 10^6