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Questions in physics

[Answered] Technician A says that the best method of measuring the temperature of a liquid is to use a thermocouple pyrometer. Technician B says that the best method of measuring the temperature of a liquid is to use an infrared thermometer. Who is correct? A) A only B) B only C) Both A & B D) Neither A nor B

[Answered] What is temperature? A. A measure of the average kinetic energy of a substance B. A measure of the average pressure acting on a substance C. A measure of the melting point characteristic of a substance D. A measure of the average forces within a substance

[Answered] (i) State two factors that determine the pressure at a point in a liquid. (ii) Explain why dam walls are thicker at the bottom than at the top.

[Answered] Which equation shows the correct relationship between mechanical energy, kinetic energy, and potential energy? $ME=KE+PE$ $ME + KE = PE$ $ME=KE-PE$ $ME+PE=KE$

[Answered] The path along which a planet travels around the sun is called (a) eclipse (b) orbit (c) solar system (d) satellite (e) radar

[Answered] (b) At the end of the straight section, the track remains horizontal but bends to the right, as shown in Fig. 2.1. When the motorcyclist reaches the bend, she travels around the bend in a circular path at a constant speed. (i) Velocity is a vector quantity. State how a vector quantity differs from a scalar quantity. (ii) Describe what happens to the velocity of the motorcyclist as she travels around the bend at constant speed. (iii) Explain why there must be a resultant force on the motorcyclist as she travels around the bend.

[Answered] State whether each sentence below is true or false. 1. A velocity vector takes both the speed and the direction of a moving object into account.

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

[Answered] (ii) [tex]V=I R[/tex] [tex]\Rightarrow \quad R=\frac{V}{I}=\frac{1.5}{0.5}=3 \Omega[/tex] Question 34 (WASSCE Nov 2017 Ou 5d) State two ways in which parallel wiring system in households is important. ii) The power rating of an electric stove is 2 kW. Calculate the amount of energy it uses in 1 hour.

[Answered] Why do planets revolve around the Sun? A) The Sun's gravity pulls the planets in orbit around it. B) Conservation of angular momentum. C) Conservation of energy. D) Action of God.