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Questions in physics

[Jawaban] Which medium is more dense? Is it water or air? Complete the sentences below. A ray passing from a ______ dense medium into a ______ dense medium, refracts towards the normal.

[Jawaban] The loudest sound measured one night during a hockey game was 112 dB. The loudest sound measured during a hockey game the next night was 118 dB. What fraction of the sound intensity of the second game was the sound intensity of the first game? L = loudness, in decibels I = sound intensity, in watts/m² I₀ = 10⁻¹² watts/m² Options: 0.25, 0.78, 0.95, 0.99

[Jawaban] Which Semiconductor material is made from coal ash? (a) Germanium (b) Silicon (c) Tin. (d) Carbon

[Jawaban] 1. What is the reason why surface particles of Saturn are used to disprove the nebular theory? 2. Suppose the fate of the sun to become a white dwarf happens soon, how will it affect the conditions on Earth?

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

[Jawaban] Any external force that acts against movement is called A. gravity B. efficiency C. resistance D. momentum

[Jawaban] What variable represents specific heat in the equation [tex]Q=m c \Delta T[/tex]? A. The variable [tex]$c$[/tex] B. The variable [tex]$T$[/tex] C. The variable [tex]$Q$[/tex] D. The variable [tex]$m$[/tex]

[Jawaban] The equation $T^2=A^3$ shows the relationship between a planet's orbital period, $T$, and the planet's mean distance from the sun, $A$, in astronomical units, $A U$. If planet $Y$ is twice the mean distance from the sun as planet $X$, by what factor is the orbital period increased? A. $2^{\frac{1}{3}}$ B. $2^{\frac{1}{2}}$ C. $2^{\frac{2}{3}}$ D. $2^{\frac{3}{2}}$

[Jawaban] The sun rotates faster at the equator than its poles. True False

[Jawaban] Which unit abbreviation is a measurement of force? A. [tex]$m / s$[/tex] B. [tex]$m / s ^2$[/tex] C. N D. [tex]$N / s$[/tex]