A solid copper sphere will sink in water while a hollow copper sphere of the same mass may float. Explain this observation(Answered) Explain the following observation: ice cubes float on water and solid benzene sinks in liquid benzene(Answered) (i) You are provided with the following :
-an overflow can
-a spring balance
-water
-a beaker
-a metal block
-a string
Describe an experiment to verify Archimedes principle(Answered) Figure 2 shows a uniform bar in equilibrium.
When water is added into the beakers A and B until the weights are submerged, it is observed that the bar
tips towards B. Explain the observation.(Answered) When a piece of metal is placed on water, it sinks. But when the same piece of metal is placed on a block of wood, both are found to float. Explain this observation.(Answered) The system in Figure 2 is in equilibrium at room temperature.
The system is taken outside where the temperature is 100c higher for some time.
Explain why this tips to the right immediately it is returned to the room.(Answered) The uniform bar in Figure 7 is pivoted at its midpoint. It is in equilibrium under the action of two identical balloons filled with equal volumes of different light gases at the same temperature.
Explain why the bar may not remain in equilibrium if the temperature of the surrounding changes.(Answered) State Archimedes principle(Answered) State the law of floatation(Answered) Figure 13 shows a simple hydrometer
(i) State the purpose of the lead shots in the glass bulb
(ii) How would the hydrometer be made more sensitive?
iii) Describe how the hydrometer is calibrated to measure relative density.
(Answered) Figure 14 shows a cork floating on water and held to the bottom of the beaker by a thin thread.
(i) Name the forces acting on the cork
(ii) Describe how each of the forces mentioned in (i) above changes when water added into the beaker until it fills up.(Answered) The system in figure 8 is in equilibrium When the temperature of the water is raised the system is observed to tilt to the right. State the reason for this observation.(Answered) The system in figure 8 is in equilibrium
When the temperature of the water is raised the system is observed to tilt to the right. State the reason for this observation.(Answered) State the condition necessary for a body to float in a fluid(Answered) A ship made of steel is observed to float on water yet the density of steel is approximately eight times that of water. Explain this observation.(Answered) A balloon is filled with a gas which is lighter than air. It is observed to rise in air up to a certain height. State a reason why the balloon stops rising.(Answered) Figure 6 shows two solids W and X made of the same material and immersed in water.
(i) State with a reason one of the containers experiences a greater upthrust.(Answered)