Energy and Mass

Convert 23.56 kg to tonnes.

• 23560 t

• 0.02356 t

• 0.2356 t

• 235600 t

A patient is prescribed 750 mg of anti-inflammatory medication. If there are 5 mg in every 10 mL dose, how many mLs of liquids does the patient require?

• 150mL

• 75mL

• 1500mL

• 375mL

The table below shows the energy burned per kilogram of weight in a 30-minute time period. Heidi plays basketball. She weighs 78 kg. Use the table to find how long she has to play to burn 3167 kJ?

• 1 hour

• 1.5 hours

• 2 hours

• 30 min

Calculate the fat energy intake, in calories, from eating one serving of yoghurt. (Remember: 1 cal = 4.184 J, protein = 17 kJ/g, fat = 38 kJ/g, carbohydrate = 17 kJ/g, dietary fibre = 8 kJ/g)

• 281.2 cal

• 67.2 cal

• 281200 cal

• 67208 cal

Standard light globes are rated at 100 W and energy is charged at a rate of 33.5 cents/kWh. Find the yearly energy used, in kWh, by a household that has three standard light globes in the kitchen and each globe is used for 4 hours per day. 

(Do not use units when typing your answer)

A dishwasher uses 4200 kWh of energy in a year. If energy is charged at a rate of 33.5 cents/kWh find the monthly cost. (Do not use $ when typing your answer)

Use the Schofield formula to calculate the difference in basal metabolic rate for a 12-year-old boy who weighs 36 kg and a 10-year-girl who weighs 28 kg. (Do not use units when typing your answer)