1. A kind of metal is cut into a square cube with each side equals `1.0 cm`, the mass of this cube is `41.0\ g`, what is the density of this material?
View Detail ... 2. How many significant figures are in the following numbers?
(a) `78.9 +- 0.2`
(b) `3.788 times 10^9`
(c) `2.46 times 10^(-6)`
(d) `0.0053`
View Detail ... 3. Convert following number into scientific notation format.
(a)1277
(b)0.0031
(c)210000 (3 significant figures)
(b) 0.0400
View Detail ... 4. Calculate following equations with correct significant figures.
(a) `0.31 +0.011`
(b) `0.001- 0.50`
(c) `4.11 times 10^(5) + 3.0 times 10^(6)`
(d) `1.30 times 10^(-7) -1.00 times 10^(-8)`
View Detail ... 5. Calculate following equations with correct significant figures.
(a) `3.0 times 0.011`
(b) `0.0055 / 0.5`
(c) `(1.11 times 10^(5)) times (3.0 times10^(6))`
(d) `(1.22 times 10^(-7)) / (1.0 times 10^(-8))`
View Detail ... 6. The density of water is `1.0 times 10^3\ kg//m^3`. A swimming pool need `4.51 times 10^4\ kg ` water to full it up. What is the volume of this swimming pool?
View Detail ... 7. A car drove into the highway. The driver accelerates the car from `8.0\ m//s` to `25.0\ m//s` in 10.0 seconds. What is the acceleration of the car?
View Detail ... 8. The speed of an object is depicted in the following velocity-time graph. Determine the acceleration during interval `A`, `B` and `C`.
View Detail ... 9. A car was initially at rest and started with an acceleration of `3.0 m //s^2`. How far did it traveled after 10.0 seconds?
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