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Questions in physics

[Answered] Which of the following elements is commonly used as fuel in nuclear fusion reactions? A. Silicon B. Aluminum C. Hydrogen D. Uranium E. Carbon F. Oxygen

[Answered] Deuterium is an isotope of hydrogen. The nucleus of a deuterium atom consists of one proton and one neutron. When two deuterium nuclei fuse, helium-3 is formed, and a neutron is emitted. Which equation illustrates this process? $2 H _2+ O _2 \rightarrow 2 H _2 O$ ${ }_2^2 H \rightarrow{ }_1^3 H +{ }_1^1 H$ ${ }_1^1 H \rightarrow{ }_1^2 H +{ }_1^0 e$ $2_1^2 H \rightarrow 2_2^3 He +{ }_0^1 n$

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] Distant dark-colored hills appear blue due to the: A. color of the reflected light that survives scattering. B. atmosphere between the observer and the dark hills. C. selectively reflected light that reaches a distant observer. D. sky that is reflected off the hills.

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] What is specific heat capacity? A. The amount of heat needed to raise the temperature of 1 kilogram of a substance by 1 degree Celsius. B. The temperature at which a substance boils. C. The total heat energy stored in an object. D. The amount of energy lost when a substance cools.

[Answered] What is the magnetic force on a proton that is moving at $3.8 \times 10^7 m / s$ up through a magnetic field that is 0.72 T and pointing toward you? The charge on a proton is $1.6 \times 10^{-19} C$. Use $F=q v \times B \sin \theta$. A. $6.1 \times 10^{-12} N$ left B. $6.1 \times 10^{-12} N$ right C. $4.4 \times 10^{-12} N$ right D. $4.4 \times 10^{-12} N$ left

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] The specific heat of water is $4.18 J /( g \cdot{ }^{\circ} C )$ and that of wood is $1.97 J /( g \cdot{ }^{\circ} C )$. Which statement is correct? A. Regardless of mass, wood will heat up less than water if the same heat is added. B. Given equal masses, wood will heat up less than water if the same heat is added. C. Given equal masses, water will heat up less than wood if the same heat is added. D. Regardless of mass, water will heat up less than wood if the same heat is added.