Daily Practice Questions

Explanation: Each else gets paired with the nearest unpaired if . Thus when the test (22 % 5 == 0) fails, the else part indicating that 22 is negative will be executed. This is clearly not the intent of the fragment, which can be fixed using delimiters:

Explanation: Less than 100 kJ of energy was absorbed to melt 0.250 kg of water ∴= 400 kJ kg−1. Choice C, 300 kJ kg−1, is the closest number that is less than 400. The actual heat of fusion of water is 334 kJ kg−1.

Explanation: The acceleration on the surface of a planet is given by the equation a = Gm _{planet} / r ^{2} _{planet} . The new planet has twice the radius of Earth and four times the mass (doubling the radius increases the volume by a factor of 8, but halving the density decreases the mass by a factor of 2; the net result is an increase by a factor of 4). Because the radius is squared in the above formula, these effects cancel out exactly, leaving the planet’s surface with the same acceleration due to gravity as on the surface of Earth.

Explanation: The sentence states that the ethics committee 'ultimately' took some action, but despite that, 'the taint of scandal followed her long after the investigation had concluded.' This implies the committee did *not* find her guilty or hold her responsible — otherwise, the scandal would likely have been cleared. 'Exculpated' means to absolve from blame, which fits: even though she was cleared (exculpated), the scandal's stigma remained. 'Discharged' and 'dismissed' could imply removal from position but don’t necessarily convey innocence; 'repudiated' means rejected or disowned, which would likely clear her name and contradict the lingering taint.

Explanation: The researchers’ hypothesis is that losing body water is not as detrimental if one is losing it while exercising in cold weather. If someone does not sweat as much in a cold environment, there would be less of a need to have water in one’s body to produce sweat. Thus, losing body water would not be as detrimental to someone in this situation. It is not (A) because this does not address the specifics of someone exercising in cold conditions. It is not (B) because cold would not affect whether someone could take supplements. It is not (C) because the factor in question is cold, not body mass index.

Explanation: Roberto Goizueta’s quote is used to highlight the misplaced confidence and misguided enthusiasm of those promoting New Coke. It underscores how executives misjudged consumer sentiment, which ultimately contributed to the product's failure.