Search
Question: In a hydraulic lift, if the input power is 500 W and the efficiency is 80%, what is the ou..
Question: If a person lifts a 50 kg object to a height of 2 meters in 5 seconds, what is the power e..
Question: A light bulb uses 60 W of power. How much energy does it consume in 5 hours?Options: 18000..
Question: A 2 kg object is moving with a speed of 3 m/s. What is its total mechanical energy?Options..
Question: A roller coaster at the top of a hill has a potential energy of 5000 J. If it descends to ..
Question: A 10 kg object falls from a height of 20 m. What is its potential energy at the top?Option..
Question: A ball is thrown vertically upwards with a speed of 30 m/s. What is the maximum height it ..
Question: A cyclist accelerates from rest to a speed of 10 m/s in 5 seconds. What is the average pow..
Question: A 2 kg object is dropped from a height of 20 m. What is its potential energy at the top? (..
Question: A ball is thrown vertically upwards with a speed of 15 m/s. What is the maximum height it ..
Question: If a machine does 2000 J of work in 5 seconds, what is its power output?Options: 200 W400 ..
Question: A block of mass 2 kg is pushed along a horizontal surface with a constant force of 10 N. W..
Question: What is the dimensional formula for acceleration?Options: [M^0 L^1 T^-2][M^0 L^0 T^-2][M^1..
Question: In the measurement 0.03040, how many significant figures are present?Options: 3452Correct ..
Question: When rounding the number 0.6789 to three significant figures, what is the result?Options: ..
Question: What is the result of dividing 6.38 by 2.0, considering significant figures?Options: 3.193..
Question: If a measurement is recorded as 1500 m, how many significant figures does it have?Options:..
Question: What is the correct way to express 0.000123 in scientific notation with significant figure..
Question: When multiplying 3.00 by 2.5, how many significant figures should the answer have?Options:..
Question: A student records the time taken for a reaction as 15.0 s with an uncertainty of ±0.5 s. W..
Question: In a lab experiment, the density of a liquid is measured as 1.2 g/cm³ with an uncertainty ..
Question: A student measures the speed of a car as 60 km/h with an uncertainty of ±2 km/h. What is t..
Question: A voltage is measured as 12.0 V with an uncertainty of ±0.1 V. What is the absolute error?..
Question: If a length is measured as 30.0 cm with an uncertainty of ±0.2 cm, what is the maximum pos..
Question: In an experiment, a student measures the mass of an object as 200 g with an uncertainty of..
Question: A pendulum\'s period is measured as 2.0 s with an uncertainty of ±0.1 s. What is the relat..
Question: A thermometer reads 100.5 °C when the actual temperature is 100.0 °C. What is the percenta..
Question: If the true value of a measurement is 50.0 cm and the measured value is 49.5 cm, what is t..
Question: What is the value of 1 Joule in terms of base SI units?Options: 1 kg·m²/s²1 kg·m/s²1 m²/s²..
Question: What is the main mechanism of heat transfer in liquids?Options: ConductionConvectionRadiat..