States of matter

A box weighing 360 N rests on the ground. The bottom of the box measures 0.30 m by 0.20 m. How much pressure does the box exert on the ground? $P=\frac{F}{A}$  

• 6.0 x 10³ Pa

• 5.0 x 10³ Pa

• 4.0 x 10³ Pa

• 3.2 x 10³ Pa

2. The figure below shows two canisters filled with different gases. Each container has the same number of gas particles. What is the temperature of the second gas?

• 176 K

• 226 K

• 353 K

• 451 K

If the density of water is 1.00 x 10^3 kg/m3, how much pressure is exerted on an object by a 50.0-m column of water? $P_{fluid}=\rho gh$  

• 2.0 x 10⁵ Pa

• 4.9 x 10⁵ Pa

• 5.0 x 10⁵ Pa

• 5.1 x 10⁵ Pa

An 8.3-kg object with a volume of 0.86 X 10-3 m3 is submerged in water. What is the buoyant force on the object? $F_{buoyant\ }=\ \rho_{water\ }Vg$  

• 7.0 N

• 7.1 N

• 8.1 N

• 8.4 N

Which assumption is true of an ideal gas?

• The gas has volume because the particles take up space.

• The particles experience no inter-molecular attractive forces.

• The particles undergo inelastic collisions with the surface of their container.

• The ideal gas model is not accurate under most conditions.

16. When streamlines are close together, ____ compared to streamlines that are farther apart.

• the velocity is increased and the flow is turbulent

• the velocity is increased and the pressure is reduced

• the velocity is reduced and the pressure is increased

• the velocity is reduced and the pressure is reduced