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Questions in physics
📝 Answered - In a scenario where a thin metallic strip on a vernier caliper descends from the upper edge to the lower edge and makes constant contact with the surface of a beaker, the main scale displays a reading of 6.4 cm with a vernier constant of 1.1 mm, and the fourth vernier scale division aligns precisely with a main scale division. Determine the precise depth of the beaker, assuming there is no zero error.
📝 Answered - An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
📝 Answered - Which process would correctly calculate the frequency of a wave? A. dividing speed by wavelength B. dividing frequency by wavelength C. multiplying frequency by period D. dividing wavelength by period
📝 Answered - A block of 150 kg mass is placed on a rough horizontal plane. The coefficient of static friction between the block and the plane is 0.33. Determine the force required to prevent the block from moving in each of the following cases: (i) If the block is pushed by a horizontal force. (ii) If the block is pulled by an inclined force, inclined at 20° to the horizontal. (iii) If the block is pushed by an inclined force, inclined at 20° to the horizontal.
📝 Answered - With air by blowing continuously, what do you think happened to the air inside the balloon? A. It becomes solid. B. It changes its volume. C. It disappears. D. It spreads out.
📝 Answered - (b) Some pieces of stainless steel cubes at -18 °C are added into 250 g of water at 15 °C. The mass of each steel cube is 50 g. The specific heat capacities of stainless steel and water are 502 J kg⁻¹ °C⁻¹ and 4200 J kg⁻¹ °C⁻¹ respectively. If the final temperature of the water is 9.7 °C, how many cubes are added?
📝 Answered - An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
📝 Answered - Explain the work-energy theorem, including the direction energy moves and how it relates to positive and negative work.
📝 Answered - You are measuring the diameter of a small steel rod. The main scale reading is 5 mm, and the thimble scale coincides perfectly at the 28th division. Calculate the diameter of the steel rod.
📝 Answered - An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
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