# Properties of matter Questions and Answers

Physics
Properties of matter Solutions
How old do scientists think the Earth is? Over 4 billion years old 4 million years old Not older than 400, 000 years old 4,000 years old
Physics
Properties of matter Solutions
A hollow ball with a diameter of 3.81 cm has an average density of 0.0839 g/cm³. What force must be applied to hold it stationary while it is completely submerged under water? (Enter the magnitude in
Physics
Properties of matter Solutions
The bulk modulus of a material is 7.63*10¹¹ N/m². What fractional change in volume does a piece of this material undergo when it is subjected to a bulk stress increase of 5.07*10⁷ N/m²? Assume that
Physics
Properties of matter Solutions
The bulk modulus of a material is 7.89 x 10¹¹ N/m². What fractional change in volume does a piece of this material undergo when it is subjected to a bulk stress increase of 2.94x10⁷ N/m²? Assume that the force is applied uniformly over the surface. Round your answer to 3 decimal places.
Physics
Properties of matter Solutions
The “lead” in pencils is a graphite composition with Young's modulus of approximately 1.0x10⁹ N/m². Calculate the change in length of the lead in an automatic pencil if you tap it straight into the pencil with a force of 5.6 N. The lead is 0.51 mm in diameter and 53 mm long. Round your answer to 5 decimal places.
Physics
Properties of matter Solutions
A vertical, solid steel post 30 cm in diameter and 2.5 m long is required to support a load of 8014 kg. You can ignore the weight of the post. What is the strain in the post. Ysteel == 200 GPa
Physics
Properties of matter Solutions
The bulk modulus for bone is 13 GPa. (a) If a diver-in-training is put into a pressurized suit, by how much would the pressure have to be raised (in atmospheres) above atmospheric pressure to compress
Physics
Properties of matter Solutions
There is little geological activity on the terrestrial planets and icv moons. True False The composition of the planets gives another clue about origins. True False
Physics
Properties of matter Solutions
Bars A and B are attached to a wall on the left and pulled with equal forces to the right. Bar B, with the same length and twice the radius of bar A, stretches half as far as bar A. What is the
Physics
Properties of matter Solutions
A rod of cross-section S = 100 cm² is held between two fixed solid walls 1m apart. The temperature of one wall is then raised, and a constant heat flux Q = 0.5 W is established in the rod. What is the
Physics
Properties of matter Solutions
A sphere of radius R has uniform density p = 3 g/cm³. If the escape velocity from the surface of sphere is 40 m/s, then value of R is nearly nx 10 km. Find value of n to nearest integer.
Physics
Properties of matter Solutions
A gas storage cylinder in an ordinary chemical laboratory measures 3.1 cm wide and 12. cm high. This is the label on it. Contents: N₂ gas Pressure: 5.23 atm If the cylinder is opened and the gas