Question

Perform the following operations and express your answers using the appropriate number of significant figures.

60.0 kg + 22.1 kg + 0.52 kg

8.75 ms − 750.0 μ s

( 1.50 × 10 4 m/s ) × 120.0 s

π ( 0.22 m 2 + 220 cm 2 )

sin 65.0 ∘ × cos 25.05

Answer 1

1.) 60.0 kg + 22.1 kg + 0.52 kg = 82.6 kg or 8.26e+1 kg (3 significant digit, 1 decimal)

2.)8.75 ms - 750.0 us = 0.00875 s - 0.00075 s = 0.00800 s or 8.00e-3 s ( 3 significant digit, 5 decimal)

3. (1.50e+4 m/s)*120.0 s=1800000 m or 1.80e+6 (3 significant digit, 0 decimal)

4.

(2 significant digit, 2 decimal)

5.