Determine if the following errors are of random or systematic type. Justify your response. (a) A digital scale, that always shows 0.2 lb when no weight is applied. (b) Vibration of the needle of an automobile speedometer. (c) Consistent temperature difference between two sensors reading the air temperature in the same room.

Two polarizers are oriented at 70∘∘ to one another. unpolarized light falls on them. what fraction of the light intensity is transmitted?

When does your body conduct current more readily?

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?