Mindblown: a blog about philosophy.

A student measures the potential difference across a battery as 12.4V and states that his measurement has a percentage uncertainty of 2%. Calculate the absolute uncertainty in his measurement.

The depth of water in a bottle is measured as 24.3cm, with an uncertainty of 0.2cm. (This could be written as 24.3 ± 0.2cm.) Calculate the percentage uncertainty in this measurement.

A.) Being too long B.) Lacking true substance C.) Not being funny Answer:- B.) Lacking true substance The Importance of Being Earnest was criticized by George Bernard Shaw, a prominent literary critic of the early 19th century, for lacking content. He meant that although Wilde attempted to depict the elitism that prevailed among the ruling class…

A. Brain wave associated with critical thinking. B. Low frequency, high amplitude brain wave. C. Sleep-related brain waves called spindles. D. Low frequency, low amplitude brain wave. Answer:- C. Sleep-related brain waves called spindles. Theta waves happen during REM sleep in nonhuman creatures, Stage 2 NREM sleep in humans, and the sleepy state previous to sleep…

Garrett throws a dart at a circular dart board. The dart board has a radius of 18 inches, and the bull’s eye in the center of the dart board has a radius of 4 inches. What is the probability that a dart thrown at random within the dartboard will hit the bull’s eye? Round your…

A. Happiness B. Grief C. Anger D. Love Answer:- D. Love The most common function of Shakespearean sonnets is to convey the love between various characters. Because sonnets were one of the most revered poetic genres in his day, these poems were composed specifically for that reason. Shakespeare’s sonnets often have a range of subjects, but…

A car battery is labelled ‘50Ah’. This means that it can supply a current of 50A for one hour. a. For how long could the battery supply a continuous current of 200A needed to start the car? b. Calculate the charge which flows past a point in the circuit in this time.

Calculate the extension of a copper wire of length 1.00m and diameter 1.00mm when a tensile force of 10N is applied to the end of the wire. (Young modulus E of copper = 130GPa.)

A piece of steel wire, 200.0cm long and having cross-sectional area of 0.50mm2, is stretched by a force of 50N. Its new length is found to be 200.1cm. Calculate the stress and strain, and the Young modulus of steel.

Calculate the pressure of water on the bottom of a swimming pool if the depth of water in the pool varies between 0.8m and 2.4m. (Density of water = 1000kgm−3.) If atmospheric pressure is 1.01 × 105Pa, calculate the maximum total pressure at the bottom of the swimming pool.