Q: In a fuel cell, energy is not stored; electrical energy is provided by what? Read this paragraph and choose the correct option from the provided answers: called an alkaline battery when adapted to operate under alkaline conditions. Button batteries have a high output-to-mass ratio; lithiumiodine batteries consist of a solid electrolyte; the nickel cadmium (NiCad) battery is rechargeable; and the leadacid battery, which is also rechargeable, does not require the electrodes to be in separate compartments. A fuel cell requires an external supply of reactants as the products of the reaction are continuously removed. In a fuel cell, energy is not stored; electrical energy is provided by a chemical reaction. Choices: - fusion reaction - carbon reaction - consumption reaction - chemical reaction A:
chemical reaction

Q: Meningitis, for example, is caused by a viral or bacterial infection of the tissues covering what? Read this paragraph and choose the correct option from the provided answers: Nervous tissue may become infected by microorganisms. Meningitis, for example, is caused by a viral or bacterial infection of the tissues covering the brain. This may cause the brain to swell and lead to brain damage and death. Choices: - the skin - the liver - the lungs - the brain A:
the brain

Q: Q: Paint keeps oxygen and water from coming into direct contact with the metal, which prevents what? Read this paragraph and choose the correct option from the provided answers: Paint keeps oxygen and water from coming into direct contact with the metal, which prevents corrosion. Paint is more necessary because salt is an electrolyte that increases the conductivity of water and facilitates the flow of electric current between anodic and cathodic sites. Choices: - heat - evaporation - filtration - corrosion A:
A: corrosion

Question: Q: The extent to which a substance may be dissolved in water or another solvent is known as what? Read this paragraph and choose the correct option from the provided answers: The extent to which a substance may be dissolved in water, or any solvent, is quantitatively expressed as its solubility, defined as the maximum concentration of a substance that can be achieved under specified conditions. Substances with relatively large solubilities are said to be soluble. A substance will precipitate when solution conditions are such that its concentration exceeds its solubility. Substances with relatively low solubilities are said to be insoluble, and these are the substances that readily precipitate from solution. More information on these important concepts is provided in the text chapter on solutions. For purposes of predicting the identities of solids formed by precipitation reactions, one may simply refer to patterns of solubility that have been observed for many ionic compounds (Table 4.1). Solubilities of Common Ionic Compounds in Water Soluble compounds contain group 1 metal cations (Li+, Na+, K+, Rb+, and Cs+). Choices: - humidity - flexibility - turbidity - solubility A:
Answer: solubility

*Question*
Q: The gender of a baby is determined by what special pair of chromosomes? Read this paragraph and choose the correct option from the provided answers: One of the exciting things about expecting a child is wondering if the baby will be a boy or a girl. There are many superstitions about how one might influence or predict the outcome. But what really determines if a baby is male or female? We now know that the gender of a baby is determined by a special pair of chromosomes known as the sex chromosomes. Choices: - diploid chromosomes - sister chromatids - reflection chromosomes - sex chromosomes A:
**Answer**
sex chromosomes

(Q).
Q: What is the measure of change in velocity of a moving object? Read this paragraph and choose the correct option from the provided answers: Acceleration is a measure of the change in velocity of a moving object. It shows how quickly velocity changes. Acceleration may reflect a change in speed, a change in direction, or both. Because acceleration includes both a size (speed) and direction, it is a vector. Choices: - transmission - vibration - kinetic energy - acceleration A:
(A).
acceleration