Exams & Certification

Is hardness an intensive property or an extensive property? Is work/heat an intensive or extensive properties? The Correct Answer and Explanation is: Correct Answer: Explanation (300 words): Physical properties of matter can be classified as either intensive or extensive. This classification depends on whether or not the property changes with the amount of substance present. […]

Identify the highlighted muscle. This muscle works synergistically with latissimus dorsi. Triceps brachii Pectoralis minor Coracobrachialis Rhomboid major Teres major Subscapularis Reset Zoom The Correct Answer and Explanation is: The correct answer is Teres major. Explanation: The muscle highlighted in the anatomical model is the teres major. This thick, flattened muscle is located in the posterior

Describe the unilateral action of the highlighted muscle. Depression of scapula Rotation of head to same side Lateral flexion of neck Retraction of scapula Rotation of head so face turns to opposite side Rotation of head to opposite side Extension of head and neck The Correct Answer and Explanation is: Correct Answer: Rotation of head

An IQ score has a mean of 100 and a standard deviation of 15. Genius is sometimes characterized as a person with an IQ score of 140 or above. What fraction of the population scores at the genius level? What would be the IQ score corresponding to the 90th percentile The Correct Answer and Explanation

An IQ score has a mean 90, and standard deviation 10. (a) A genius is sometimes characterized as a person with an IQ score of 140 or above What fraction of the population scores at the genius level? (b) What would the IQ score corresponding to the 99th percentile? The Correct Answer and Explanation is:

A fraction whose numerator is greater than its denominator is called an improper fraction For example; in the fraction 5/4, the denominator tells you the unit should be divided into 4 equal-sized parts, as shown at the right What do you need to draw in order to show 5 of these 1/4 pieces? Make a

The volume of this cone is 100.48 cubic centimeters. What is the height of this cone? Useand round your answer to the nearest hundredth. 4 cm hcentimeters The Correct Answer and Explanation is: To find the height of the cone, one must use the formula for the volume of a cone: V = (1/3)πr²h. In

An observatory is shaped like a cylinder standing on one of its bases with a dome on top. The diameter of the floor of the observatory is 64 feet, as shown in the diagram. 64 ft Which measurement is closest to the circumference of the base of the observatory in feet? F 200.96 ft G

Acetic acid and sodium bicarbonate produce sodium acetate with release carbon dioxide gas and water The Correct Answer and Explanation is: Correct Answer:When acetic acid (CH₃COOH) reacts with sodium bicarbonate (NaHCO₃), the products are sodium acetate (CH₃COONa), carbon dioxide gas (CO₂), and water (H₂O). The balanced chemical equation is: CH₃COOH + NaHCO₃ → CH₃COONa +

What causes the high luster of a metal? a excitation of electrons into empty orbitals b mobility of electrons C easily ionizable metal atoms d their low melting points The Correct Answer and Explanation is: Correct Answer: B. mobility of electrons Explanation The high luster of a metal arises from the mobility of electrons, specifically