HotelInfantesAgres - Tempat Tanya Jawab Pelajaran & Ilmu Pengetahuan Logo

Questions in physics

[Jawaban] A drop of ink is placed in water and left undisturbed. After some time, the whole water turns blue. Explain the process involved and why it happens even without stirring.

[Jawaban] Who successfully tested a fuel cell to generate electricity in space? (1) ISRO (2) NASA (3) DRDO (4) None of these

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

[Jawaban] 1. What is the resistivity of a wire? 2. According to Kirchhoff's first law, i.e., ΣI = 0 at a junction, what conservation principle does it deal with? 3. Why is constantan wire used for making standard resistance? 4. A large number of free electrons are present in metals. Why is there no current in the absence of an electric field?

[Jawaban] A body was found at $6 a.m.$ in a warehouse where the temperature was $50^{\circ} F$. The medical examiner found the temperature of the body to be $66^{\circ} F$. What was the approximate time of death? Use Newton's law of cooling, with $k=$ 0.1947 . $T(t)=T_A+\left(T_o-T_A\right) e^{-k t}$ A. Midnight (12 a.m.) B. 5 a.m. C. 2 a.m. D. 3 a.m.

[Jawaban] A plane is flying north at 200 km/h, and a wind is blowing east at 50 km/h. What is the resultant velocity of the plane?

[Jawaban] The formula for density is given by [tex]p=\frac{M}{V}[/tex], where [tex]p[/tex] is density, [tex]M[/tex] is mass and [tex]V[/tex] is volume. If a substance has a mass of 27.82 grams and a volume of 3.6 ml, what is the most accurate density?

[Jawaban] Note of ICT chapter?

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

[Jawaban] Which best describes the runners? A. Garreth and Elisa ran the same distance but not the same displacement, Luigi and Jasmine went the same displacement, and Logan ran faster than Jasmine. B. Garreth ran farther than Luigi, Elisa and Jasmine went the same distance, and Logan and Jasmine have the same displacement in the opposite direction. C. Garreth and Elisa ran together, Luigi and Jasmine went the same distance, and Logan and Jasmine have the same displacement in the opposite direction. D. Garreth ran less than Logan, Elisa and Jasmine went the same displacement, and Luigi and Garreth ran together.