Energy - math word problems - page 10 of 11
Number of problems found: 207
- Projectile height
A 100 g body is ejected vertically upwards from the surface of the Earth at an initial speed of 30 m/s. Determine the height at which the body rises and its potential energy at the path's highest point. - Energy
In one region, the September energy consumption levels for single-family homes are normally distributed with a mean of 1050 kWh and a standard deviation of 218 kWh. Find the consumption level separating the bottom 45% from the top 55%. - Electricity consumption - Filip
Last year Filip was writing a long school paper. As a great conservationist of nature, however, he was unable to decide which is more ecological - to write the paper on a computer, or to write the paper by hand. Filip found out that: the paper written on - Water temperatures
To 25 liters of water at 50 °C, we add 15 liters of water at a different temperature. How many °C should the water be colder than 50 °C so that 40 liters of the water obtained has a temperature of 42.5 °C? - Fuel consumption
The car consumed m liters of gasoline per s of kilometers. How many liters of gasoline does it consume per 100 km? - Three drivers
Three drivers driving in the same direction found that they had the same amount of gasoline. The first is enough to go 6 km, 4 km, second and third 3 km. Gasoline they divided, so all three just drove to the nearest petrol station. How many km away was a - Bulb consumption
Eighty identical light bulbs shine in the sports hall for two hours. How long does it take to consume the same energy from 100 such bulbs? - Gasoline consumption Skoda MB
The consumption of cars for 100 km is 6.6 liters of gasoline and 1 liter of gasoline costs € 1.274. How many euros did grandfather spend when the car traveled 321 km? - Cows
Twenty cows have food for 60 days. We reduce the dose to two-thirds for 18 cows. How many days will it feed? - Locomotive
Locomotive pulled a permanent train load of 200 kN horizontally along the track of 5 km. What work has it done? - Lamp brightness
Ten lamps with a certain luminosity are needed to illuminate the rooms. How many lamps with 2.5 times more brightness are needed for the same lighting in the same room? - Elevator
In homes with more floors, elevators are used. For passenger transport, the most commonly used traction elevator counterweight. The top of the shaft engine room with the engine. The car is suspended on a rope, which is guided up over two pulleys to the co - MPG
324 miles a week fills up twice a week. Each fill is 38 gallons. What is the gas mileage of the car? - Shot
Shot with a mass 39 g flying at 427 m/s penetrates into the wood to a depth 21 cm. What is the average force of resistance of wood? - Car
At what horizontal distance reaches the car weight m = 753 kg speed v = 74 km/h when the car engine develops a tensile force F = 3061 N. (Neglect resistance of the environment.) - Motor physics
A car is traveling at 104 km/h on the highway. The pulling power of the motor is 10 kN. Find the engine power in kW. - University bubble
You'll notice that the college is up slowly every other high school. Many people in Slovakia/Czech Republic study political science, mass media communication etc.. Calculate how many times more does a clever 24-year-old mason with a daily net income of 16 - Decibel
A circuit has an input power of 73 mW. Its output power is 18 mW. What is the loss in decibels? - Excavation
Mr. Vendelín calculated that excavation for a water connection digs for 10 days. His friend would take 10 days. Vendelín worked 3 days alone. Then his friend came to help and started on the other end. On what day since the beginning of the excavation they - Water
Mix 58 l of water with a temperature of 81 °C, 10 l warm of 54 °C, and 41 l water of 67 °C. What is the temperature of the mixed water immediately after mixing?
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