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A 940kg motorboat accelerates away from a dock at 2.1m/s^2 .t Its propeller provides a thrust force of 4.0kN. What drag force is exerted by the water on the boat?
The magnetic field inside a superconducting solenoid is 4.1 T. The solenoid has an inner radius of 2.2 cm and a length of 29.0 cm. Find the magnetic energy density inside the solenoid
It takes the elevator in a skyscraper 4.5s to reach its cruising speed of 12m/s. What is the passenger's weight before the elevator starts moving
a ray of light traveling through one type of glass, In which type of glass does light travel at a higher speed
During one cycle a heat engine transfers 4 X 103 J of heat from a hot reservoir and exhausts 2.4 X 103 J to a cold reservoir. How much work is performed by this engine in one cycle
draw a motion diagram, using the particle model, showing the cars velocity vectors as seen from a helicopter hovering over the highway.
A person who weighs 715 N is riding a 98-N mountain bike. Suppose the entire weight of the rider and bike is supported equally by the two tires. find the area of contact between each tire and the ground
A uniform electric field exists in the region between two oppositely charged plane parallel plates. Find the magnitude of this electric field
A 100 g aluminum calorimeter contains 250 g of water. The two substances are in thermal equilibrium at 10°C. Determine the specific heat of the unknown second sample
An air-track glider attached to a spring oscillates between the 10.0 {rm cm} mark and the 58.0 {rm cm} mark on the track. The glider completes 15.0 oscillations in 35.0 {rm s}. What are the (a) period, (b) frequency, (c) amplitude, and (d) highest..
A man stands on the roof of a 19.0 -tall building and throws a rock with a velocity of magnitude 30.0 at an angle of 42.0 above the horizontal. find the max height above the roof reached by the rock
An object with a charge of -2.6?C and a mass of 1.2×10?2kg experiences an upward electric force, Find the magnitude of the electric field
A wooden dowel (cylinder) has a diameter of 2.20 cm. Determine the density of the dowel
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