Fundamentals of Physics - practice problems - page 8 of 50
Number of problems found: 985
- Thermal energy
From the formula for calculating thermal energy Q=m*c*t, express t and calculate by how many °C 2 kg of water must be heated to increase its energy by 126 kJ - Barrel ethanol weight
What is the weight of a two-hundred-liter barrel with ethanol if the empty barrel weighs 50 kg? - Object final velocity
The object has a speed of 25 m/s and accelerates 5.0 m/s² for 250 meters. What is the final velocity? - Car acceleration speed
The car has a speed of 5 m/s and accelerates to 35 m/s in 12 seconds. Calculate the acceleration of the car at a speed of 34.5 m/s. - Copper wire meters
How many meters of copper wire with a diameter of d=3 mm will be produced from 60 kg of copper scrap if the specific gravity of copper is p=9 g/cm³? - Cyclist resistance work
A cyclist rides along a horizontal path at a constant speed, overcoming a total resistance force of 20 N. What work does he do on a 5 km track? - Body glycerol volume
They will calculate the volume of a body that stretches the force gauge in the air with a force of 80 N. After immersion in glycerol with a density of 12 kg. m-3 is a load cell stretched by a force of 30 N. - Pipe water radius
5 m³ of water flows through the pipe in 1 second at a maximum speed of 2 m/s. What is the pipe radius? - Gear wheel rotation
Two gears mesh together. The larger wheel has 56 teeth, and the smaller wheel has 20 teeth. How many times does the smaller wheel turn if the larger wheel turns 15 times? - Plane sound echo
A plane flying at 612 km/h speed sent a sound signal. In front of the aircraft (in the direction of flight), there is a fixed object at a distance of 3 km, from which the sound is reflected back to the plane. How long will it take the pilot to hear the ec - Body trajectory energy A body of mass 4 g is shot perpendicularly from the ground and lands in 8 s. What is its kinetic energy at the beginning of its trajectory, what speed does it take off, and where does the distance from the ground stop?
- Ball collision speed
Two inelastic/plastic balls move towards each other with equal velocities of 2 m/s. The weight of one ball is 3 kg, the other 1 kg. Determine the speed of the balls after the collision and the loss of kinetic energy. - Flywheel energy decrease
How much energy was supplied by the flywheel of the device if its number of revolutions decreased from 1200 to 720 revolutions per minute if it has a moment of inertia of 71.3 kg/m²? - Mercury density measurement
10 ml of mercury has been measured to weigh 0.135 kg. Calculate the density of mercury and compare it with the density shown in the tables. - Tin body mass
A tin object transferred 150,000 J of heat, and its temperature dropped by 10 °C. Calculate the mass of the tin object. (c of tin is 0.227 kJ/kg. °C). Enter the resulting weight in grams and round it to two decimal places. - Iron key temperature By how much °C will the temperature of an iron key weighing 0.004 t change if it receives 360,000 J of heat? ( c of iron is 450 J/kg.°C )
- Steel heat capacity Calculate the mass heat capacity of a steel body weighing 2 kg, which was heated from an initial temperature of 15 °C to 80 °C by supplying 60 kJ of heat.
- Makarska riviera
The motor boat departs from Baška Voda at 19:15 and arrives in Makarska at an average speed of 30 km/h at 20:00. However, a group of tourists from Germany must be in Makarska a third of the time earlier. What should the average speed of the boat be? - Ring gold volume
The ring weighs 28 g and has a volume of 2 cm³ to find out if it is made of pure gold. - Vehicle speed ratio The speeds of two motor vehicles are in the ratio 7:4. How many kilometers will the slower vehicle travel simultaneously, if the faster vehicle travels 52.5 km?
Do you have homework that you need help solving? Ask a question, and we will try to solve it. Solving math problems.
