A 12-M High by 2

question 4

Multiple Choice

A 1.2-m high by 2.8-m wide, vertical rectangular gate is used to control the flow of water from a reservoir to a grinding mill. A frictionless hinge runs along the bottom of the gate. The
Minimum force acting normal to and at the very top of the gate needed to hold the gate shut if
The water is at the very top of the gate, is nearest:

• A) 6590 N
• B) 9800 N
• C) 10 000 N
• D) 13 300 N How high above the hinge must the water be for the gate
• To just open?

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Definitions:

Reading Scores

Numerical or categorical assessments that represent an individual’s ability or proficiency in reading.

Degrees of Freedom

Refers to the number of independent values or quantities which can be assigned to a statistical distribution, minus the number of parameters estimated from sample data.

Equal-variances Test Statistic

A statistical method used to assess whether the variances of two populations are equal as part of comparing their means.

Confidence Interval Estimator

A statistical tool used to estimate the range within which a population parameter lies, with a certain confidence level.