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Car manufacturers use radiation for which task?

Question Car manufacturers use radiation for which task? a) sealing windowsb) drying paintc) cleaning tiresd) lubricating engines Answer B) drying paint EXPLANATION: Car manufacturers use UV radiation to dry the paint o the vehicle. The high reflectivity of infrared radiation helps to keep the car interior cool. It also gives advantages over convection heating. It can … Read more

Which of earth’s systems was most affected by fossilized dinosaurs?

Question Which of earth’s systems was most affected by fossilized dinosaurs? A. Biosphere B. Hydrosphere C. Lithosphere D. Atmosphere Answer Answer : C) Lithosphere Explanation : Lithosphere is the only sphere where fossils can be found. Lithosphere consists of the hard rocks (Crust) and the upper mantle. The imprints of the dead species on rocks … Read more

Which statements correctly describe Earth’s magnetic field?

Question Which statements correctly describe Earth’s magnetic field? Check all that apply. A) Field lines enter Earth near the North Pole. B) The magnetic pole near Antarctica is a north pole. C) Compasses point toward a magnetic pole that is a north pole. D) Field lines circle Earth from east to west. E) A compass … Read more

This thermogram shows a person using a computer. Complete the sentence to describe the flow of thermal energy between the person and the computer.

Question This thermogram shows a person using a computer. Complete the sentence to describe the flow of thermal energy between the person and the computer. Answer The thermal energy will flow from the computer to the person. Explanation : Usually computer are such devices which converts electrical energy into thermal energy and then it gets … Read more

A molecule contains 16 atoms and undergoes a chemical change.

Question A molecule contains 16 atoms and undergoes a chemical change. How does the chemical change affect the total number of atoms of each element? Answer They remain the same Explanation: As the molecule goes from reactants to products, the number of atoms in the each of the element remains the same. This is in … Read more

The Bohr model below represents which answer choice

Question The Bohr model below represents which answer choice A) Na^1-B) Na the neutral atomC) Na^1+ Answer Na⁺ Explanation: In the given atom:   Number of protons  = 11   Number of neutrons  = 12 So, the number of electrons  = 10 The number of protons within an atom is used to determine the kind … Read more