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A-Level Physics: True or False statements

A-Level Physics: True or False statements

With reference to the figure above, a mass m hangs at the end of a rope which is attached to a support fixed on a trolley moving to the right with a speed v on a horizontal track. The angle, θ, is the angle the rope makes with the vertical. Are the following...

A-Level Chemistry: Performing Chemical Calculations

A-Level Chemistry: Performing Chemical Calculations

A mass of 0.457 g of solid carbon dioxide was vapourised into an evacuated gas syringe at r.t.p. A small amount of inert gas was introduced into the gas syringe and the volume of the gas syringe was 334.5 cm³. The temperature was kept constant throughout. How much...

A-Level Chemistry: Finding the final pH of a solution

A-Level Chemistry: Finding the final pH of a solution

What is the final pH of a solution formed by mixing equal volumes of two separate solutions of pH 2.0 and 4.0?  How can we approach the question?  pH refers to the power of hydrogen. Hint #1: It is not 3.0! Hint #2: The concept involved is ionic equilibrium. Hint...

A-Level Physics: Drawing velocity-time graphs

A-Level Physics: Drawing velocity-time graphs

A steel ball bearing is released from rest above a tall cylinder filled with water.  Sketch the possible velocity-time graphs. Indicate t1, which is the time at which the ball bearing strikes the water surface.     How can we approach the question? Refer...

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