Can I please get some help with these multiple choice questions: [1] The law of

Question

Can I please get some help with these multiple choice questions: [1] The law of conservation of energy states that in the absence of external work input or output, _____. A ) energy cannot be created or destroyed B ) momentum cannot be created or destroyed C ) mass cannot be created or destroyed D ) energy can be created and then destroyed [2] Ocean water has a pH around 8.2. Identify the correct statement. A ) Ocean water is neither acidic nor basic. B ) Ocean water is slightly acidic. C ) Ocean water is slightly basic. D ) Ocean water has a neutral pH. [3] During an _____ reaction, _____. A ) exothermic; energy is released B ) endothermic; energy is released C ) exothermic; gravity force increases D ) endothermic; nuclear force increases [4] Elements in the same period on the Periodic Table will have the _____. A ) same number of electrons in their outermost energy levels B ) same number of protons in their outermost energy levels C ) increasing number of protons as they move across the the period D ) decreasing number of protons as they move across the period [5] Groups on the periodic table list elements with _____. A ) similar chemical properties B ) different chemical properties C ) similar number of electrons D ) similar number of neutrons [6] Tides, caused by the gravitational attraction between the Earth, Moon, & the Sun: A ) are caused by rip currents B ) cannot be predicted with any degree of accuracy C ) are deep-water waves D ) are shallow-water waves [7] Which part of the visible region of the electromagnetic spectrum has the longest wavelength? A ) The blue end. B ) The yellow end. C ) The red end. D ) The ultraviolet end. [8] Temperature is generally proportional to a substance's _____. A ) average volume B ) average potential energy C ) average humidity D ) average molecular speed [9] The force of gravity between two bodies depends on their _____. A ) masses and charges B ) masses and distance apart C ) charges and distance apart D ) masses only [10] Three radioactive elements, A, B, & C, all cause 10 clicks per second on a radiation meter placed 1 inch away. After placing a piece of paper between each element and the detector, element A produces 9 clicks per second, element B produces 1 click per second, and element C produces 8 clicks per second. What can you conclude? A ) element A is an alpha emitter B ) element B is an alpha emitter. C ) element C is an alpha emitter D ) Elements A, B, & C are all alpha emitters [11] Sonar sound speed varies at different depths due to water temperature, salinity, and depth along a water column. The depth at which sound waves can travel great distances (hundreds or even thousands of miles) is called the: A ) shadow zone. B ) deep sound channel. C ) thermocline D ) mixed layer [12] Light waves and sound waves both consist of vibrations. However, _____. A ) sound waves require no medium for transmission B ) sound and light waves both require a medium for transmission C ) light waves require no medium for transmission D ) light waves require a medium for transmission [13] The gravity force acting on an object at the Earth’s surface is the same as: A ) 32 feet per second per second B ) the object’s weight C ) the universal gravitational constant D ) the object’s mass [14] An object having a net force (other than zero) acting on it means that: A ) the object is moving at a constant velocity B ) the object has no mass C ) the object is accelerating D ) the object is stationary [15] Momentum is defined as: A ) weight x height B ) mass x velocity C ) force x distance D ) work / time [16] A geostationary satellite is one which: A ) is not moving B ) is soon to crash into the Earth C ) can view cloud motions D ) is orbiting the Earth at extremely fast speeds compared to all other satellites [17] The scientific method: A ) proves all ideas B ) never really finds the absolute truth C ) is a strict recipe that all scientists must follow D ) was invented by Al Gore [18] The amplitude of a sound wave corresponds to a sound’s: A ) volume B ) pitch C ) Doppler D ) resonance [19].The frequency of a sound wave corresponds to a sound’s: A ) volume B ) pitch C ) Doppler D ) resonance [20] The difference between visible radiation and infrared radiation is: A ) its speed B ) its amplitude C ) its wavelength D ) its gravitational force [21] The greenhouse effect: A ) is beneficial to life on our planet as we know it B ) should be eliminated to save our lives C ) was invented by Al Gore D ) traps gamma and X-ray radiation in the Earth’s atmosphere [22].Which is not a branch of physical science? A ) physics B ) chemistry C ) astrology D ) meteorology [23] If an atom has 17 electrons, 20 neutrons, and 19 protons, what is its atomic mass? A ) 39 B ) 37 C ) 19 D ) 17 [24] Elements that do not react with other elements are: A ) noble B ) alkaline C ) halogen D ) metallic

Explanation / Answer

(1)

option (A) is correct

(2)

option (C) is correct

(3)

option (A) is correct

(4)

option (A) is correct

(5)

option (A) is correct.

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