A metal object of mass 156 g is lowered into a measuring cylinder containing 300 cm of water. The water level rises to 360 cm. What is the density of the metal?
Answer and explanation
Correct answer: D. 2.6 g/cm
- Step 1: Volume of the object cm.
- Step 2: Density = mass volume g/cm.
Answer
2.6 g/cm.
Why not the others: 0.433 g/cm: the final reading is used as the volume of the object. 0.52 g/cm: the starting volume of water is used. 0.385 g/cm: volume is divided by mass.
Practise more Calculations.
Free questions with an explanation for every one, and full timed Junior Cycle (Ireland) mock tests.
More Calculations questions
- A 1000 W heater is on for 2 hours. Electricity costs 30 cent per kWh. What is the cost?
- A 3000 W heater is on for 3 hours. Electricity costs 30 cent per kWh. What is the cost?
- A 1000 W heater is on for 4 hours. Electricity costs 25 cent per kWh. What is the cost?
- A metal object of mass 195 g is lowered into a measuring cylinder containing 250 cm of water. The water level rises to 275 cm. What…
- How many moles are there in 32 g of methane, CH? (Relative formula mass = 16)
- A motor takes in 500 J of energy and gives out 375 J of useful energy. What is its efficiency?