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Question: A small ferryboat is 4.00 m wide and 6.00 m long. When a loaded truck pulls onto it, the boat sinks an additional 4.80 cm into the water. What is the weight of the truck?
A container is filled to a depth of 20.0 cm with water. On top of the water floats a 35.0 cm thick layer of oil with specific gravity 0.900. What is the absolute pressure at the bottom of the conta
A 43.0 kg ballet dancer stands on her toes during a performance with four square inches (26.0 cm2) in contact with the floor. What is the pressure exerted by the floor over the area of contact in th
Given the heat of fusion and specific heat of this metal is 80.18 kJ/kg and 373 J/kg°C, respectively, determine the amount of thermal energy absorbed by the sample before reaching thermal equili
The second submarine is required to travel at a constant velocity, so the captain needs to determine the magnitude of that velocity. Draw a picture of the problem.
Assuming no heat loss to the surrounding environment, determine the minimum duration of time necessary for a 100 W aquarium tank heater to raise the temperature of 20.0 gallons of water by a differ
You are a part of a citizen's group evaluating the safety of a high school athletic program. To help judge the diving program you would like to know how fast a diver hits the water in the most compl
A person scuffing her fee on a dry day accumulates a net charge of -42 uC. How many excess electrons does she get, and by how much does her mass increase?
Charges of 4.0 µC and -6.0 µC are placed at two corners of an equilateral triangle with sides of 0.10 m. At the third corner, what is the electric field magnitude created by these two c
Question: Calculate the electric field at the center of a square 53.7 cm on a side if one corner is occupied by a +38.5 µC charge and the other three are occupied by -29.4 µC charges.
A cyclist riding this bike increases her pedaling rate form 60 rpm to 90 rpm in 10 s. What is the tangential acceleration of the pedal?
What must be the potential difference across the plates of the capacitor filled with a dielectric so that it stores the same amount of electrical energy as the empty capacitor?
Their angular speeds are 1.90 x 10-3 rad/s and 3.10 x 10-3 rad/s, respectively. How much time elapses before they meet? Find its angular speed 1.00 s after this process begins.
Question: An auto race is held on a circular track. A car completes one lap in a time of 19.3 s, with an average translational speed of 45.2 m/s. What is the radius of the track, and what was the c
Question: A wheel centered at the origin turns through a displacement of -8.00 radians. A bug riding on the wheel rim starts this trip on the +x-axis. Find its final angular position, in degrees ab
Question: An office window has dimensions 3.4 m by 1.7 m. As a result of the passage of a storm, the outside air pressure drops to 0.95 atm, but inside the pressure is held at 1.0 atm. What net for
How many electrons must be removed from each of two 4.6-kg copper spheres to make the electric force of repulsion between them equal in magnitude to the gravitational attraction between them?
A tiny sphere with a charge of q = +6.4 µC is attached to a spring. Two other tiny charged spheres, each with a charge of ?4.0-µC, are placed in the positions shown in the figure, in whi
What is your speed due to the Earth's rotation, if you are at the equator? What is your acceleration due to the Earth's rotation, if you are at the equator?
The two hot-air balloons in the drawing are 48.2 m and 61.0 m above the ground. A person in the left balloon observes that the right balloon is 13.3° above the horizontal. What is the horizonta
You are driving into St. Louis, Missouri, and in the distance you see the famous Gateway-to-the-West arch. This monument rises to a height of 192 m. You estimate your line of sight with the top of t
Suppose that the charge on the electron and proton did not have the same magnitude but instead differed by one part in 10^10. What would be the net charge on a 1.0-kg sample of helium gas?
An object initially at rest moves a distance x when a force F is applied for time t. How far will the object move of a force of 2F is applied for the same time t?
An "energy bar" contains 18g of carbohydrates. If the energy bar was his only fuel, how far could a 68kg person walk at 5km/hr ?