## Intro to Density

## Density Values & Specific Gravity

A wooden door is 1 m wide, 2.5 m tall, 6 cm thick, and weighs 400 N. What is the density of the wood in g/cm^{3}? (use *g* = 10 m/s^{2})

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Suppose an 80 kg (176 lb) person has 5.5 L of blood (1,060 kg/m^{3} ) in their body. How much of this person’s total mass consists of blood? What percentage of the person’s total mass is blood?

You want to verify if a 70-g crown is in fact made of pure gold (19.32 g/cm^{3} ), so you lower it by a string into a deep bucket of water that is filled to the top. When the crown is completely submerged, you measure that 3.62 mL of water has overflown. Is the crown made of pure gold?

- A brass wire is to withstand a tensile force of 350 N without breaking. What minimum diameter must the wire ha...
- A square steel plate is 10.0 cm on a side and 0.500 cm thick. (a) Find the shear strain that results if a forc...
- In the Challenger Deep of the Marianas Trench, the depth of seawater is 10.9 km and the pressure is 1.16×10^8 ...
- A specimen of oil having an initial volume of 600 cm3 is subjected to a pressure increase of 3.6×10^6 Pa, and ...
- A solid gold bar is pulled up from the hold of the sunken RMS Titanic. (c) The bulk modulus of lead is one-fou...
- Stress on a Mountaineer’s Rope. A nylon rope used by mountaineers elongates 1.10 m under the weight of a 65.0-...
- A circular steel wire 2.00 m long must stretch no more than 0.25 cm when a tensile force of 700 N is applied t...
- A cube 5.0 cm on each side is made of a metal alloy. After you drill a cylindrical hole 2.0 cm in diameter all...
- On a part-time job, you are asked to bring a cylindrical iron rod of length 85.8 cm and diameter 2.85 cm from ...
- At one point in a pipeline the water’s speed is 3.00 m/s and the gauge pressure is 5.00×10^4 Pa. Find the gaug...
- BIO. Artery Blockage. A medical technician is trying to determine what percentage of a patient’s artery is blo...
- Gold Brick.You win the lottery and decide to impress your friends by exhibiting a million-dollar cube of gold....
- A small circular hole 6.00 mm in diameter is cut in the side of a large water tank, 14.0 m below the water lev...
- A pressure difference of 6.00 * 104 Pa is required to maintain a volume flow rate of 0.800m3/s for a viscous f...
- The speed of sound in air at 20°C is 344 m/s. (a) What is the wavelength of a sound wave with a frequency of 7...
- Two pulses are moving in opposite directions at 1.0 cm/s on a taut string, as shown in Fig. E15.34. Each squar...