Heating element of a toaster based problem
A potential difference of 120 V produces a current of 8.0 A in the heating element of a toaster. What is the resistance of this heating element while the toaster is carrying this current?
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A block of mass 0.80 kg is suspended by a string which is wrapped so that it is at a radius of 0.054 m from the center of a pulley. The moment of inertia of the pulley is 0.0040 kg·m2.
What is the molarity of a solution of NaOH if 38.6 mL of the solution are titrated by 1.00 g of oxalic acid dihydrate?
A 5.00-kg steel ball is dropped onto a copper plate from a height of 10.0 m. If the ball leaves a dent 3.20 mm deep, what is the average force exerted by the plate on the ball during the impact?
A solution of 1.00 g of a protein in 20.0 ml of water has an osmotic pressure of 35.2 torr at 298 K. Calculate the molar mass of the protein.
What is the vacuum wavelength ? vacuum in the visible range (380 nm to 750 nm) at which destructive interference causes the film to look dark in reflected light?
A person starts walking from home and walks: 4 miles East. Find the total displacement vector for this walk. If this person walked straight home, they'd have to walk.
If a dielectric is inserted between the plates of a parallel-plate capacitor that is connected to a 100-V battery, which decreases? The electric field between the plates decrease, voltage across capacitor, or charge on capacitor?
A mixture of 60 mol% n-propylcyclohexane and 40 mol%n-propylbenzene is distilled through a simple distillation apparatus; assume that no fractionation occurs durng the distillation.
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Its key advantage is high internal validity; its disadvantage is that randomization is often ethically or practically impossible.
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