Ques:Q: Why wouldn't a teakettle have an aluminum handle? Read this paragraph and choose the correct option from the provided answers: This teakettle is made of aluminum except for its handle, which is made of plastic. Aluminum is a good conductor of heat. It conducts heat from the flames on the range to the water inside the kettle, so the water heats quickly. Plastic, on the other hand, is not a good conductor of heat. It stays cool enough to touch even when the rest of the teakettle becomes very hot. Choices: - it absorbs light - it isn't washable - it is magnetic - it conducts heat A:

Ans:it conducts heat
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Ques:Q: What is the si unit for pressure? Read this paragraph and choose the correct option from the provided answers: Summary Four quantities must be known for a complete physical description of a sample of a gas: temperature, volume, amount, and pressure. Pressure is force per unit area of surface; the SI unit for pressure is the pascal (Pa), defined as 1 newton per square meter (N/m2). The pressure exerted by an object is proportional to the force it exerts and inversely proportional to the area on which the force is exerted. The pressure exerted by Earth's atmosphere, called atmospheric pressure, is about 101 kPa or 14.7 lb/in.2 at sea level. Atmospheric pressure can be measured with abarometer, a closed, inverted tube filled with mercury. The height of the mercury column is proportional to atmospheric pressure, which is often reported in units ofmillimeters of mercury (mmHg), also called torr. Standard atmospheric pressure, the pressure required to support a column of mercury 760 mm tall, is yet. Choices: - watt - laurent - le - pascal A:

Ans:pascal
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Ques:Q: A device that produces a very focused beam of visible light of just one wavelength and color is called? Read this paragraph and choose the correct option from the provided answers: A laser is a device that produces a very focused beam of visible light of just one wavelength and color. Pulses of laser light carry communication signals through optical fibers. Choices: - mirror - microwave - prism - laser A:

Ans:laser
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Ques:Q: What are reactions that can occur only in one direction called? Read this paragraph and choose the correct option from the provided answers: Some chemical reactions can occur in only one direction. These reactions are called irreversible reactions. The reactants can change to the products, but the products cannot change back to the reactants. These reactions are like making a cake. The ingredients of a cakesuch as eggs and flourare the reactants. They are mixed together and baked to form the cake, which is the product (see Figure below ). The cake can't be "unbaked" and "unmixed" to change it back to the raw eggs, flour, and other ingredients. So making a cake is irreversible. Choices: - permanent - instantaneous - critical - irreversible A:

Ans:
irreversible
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