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Water has a specific heat capacity of 4186 J/kg C. A tank contains 500 kg of water at 10 C. The water is heated up to a temp of 90.0 C. If electricity costs $0.100 per kilowatt-hour, then what is the cost of heating the water?
Two charged dust particles exert a force of 8.5 x10-2 N on each other. What will be the force if they are moved so they are only one-seventh as far apart.
An object is sliding on a horizontal surface. The coefficient of kinetic friction between the object and the surface is 0.250. how far will the object travel before it stops
Both spacecraft are initially at rest. Explain how far does the starship move as it pulls the shuttlecraft aboard?
How many electrons must be removed from each of two 4.4-kg copper spheres to make the electric force of repulsion between them equal in magnitude to the gravitational attraction between them?
An 8.4kg crate is pulled 4.7m up a 30? incline by a rope angled 16? above the incline. What is the increase in thermal energy of the crate and incline
A 83.55kg woman walked a 5k race in 53.33 minutes. How much power did it take to complete the race
A lady ate a whole medium size pizza storing up 120 food Calories. This energy is used to heat up 2 liters of water from a certain initial temperature to a final temperature of 80 deg.C
This question requires three answers. Three resistors are connected in parallel with a 9.0 V battery. What is the voltage drop across R2
A 9000pF capacitor holds plus and minus charges of 1.35×10?7C . What is the voltage across the capacitor
While looking through the Mt. Palomer telescope, you discover a large planetary object orbited by a single moon. calculate the density of Planet Hephaestus
Froima plotted graph a student determined that the best fit line had a slope of 1.227m/s^2 and a y-interecept of 0.32m/s. Determine the uncertainty for the slop of the line
A spring with k=620 N/M is stretched with a tension of 40 N. What is the potential energy of the stretched spring
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