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A 30.0 kg crate is being pulled across a rough horizontal surface by a cable. this cable exerts a constant tension force of magnitude 45.5 N. If the crate is traveling to the right and gaining speed at a rate of 0.40 m/s2, determine the magnitude of kinetic friction acting on the box?
A tennis ball gun launches tennis balls at 18.8m/s . It's pointed straight up and launches one ball; 2.0s later, it launches a second ball. What is the first balls' velocity at that point
A 30.0-cm-long hollow nichrome tube of inner diameter 1.70mm, outer diameter 5.20mm is connected to a 3.00V battery. What is the current in the tube
A cable used to lift heavy materials like steel I-beams must be strong enough to resist breaking even under a load of 2.1 x 106 Newton. Obtain by how much will a 7.0 meter length of this cable stretch when subject to the 2.1 x 106 N load
a copper bar 2.5 m long has a circular cross section of radius 2 cm. one end is kept at 80 oc and the other end is kept
You do 6.5 J of work to stretch a spring with k = 190 N/m , starting with the spring unstretched. How far does the spring stretch
The heater element of a toaster is 5.40m length of nichrome wire, whos diameter is 0.480mm. What is the power drawn by the toaster
What is the distance between an object and its real image formed by a thin converging lens with focal length f, if the object distance is p? What is this minimum object-image distance
44.3 kg of ice is melted into water then raised to a temperture of 354.8 K. How much energy is needed to complete this process
A block of mass m [kg] slides from rest a distance d [m] down a frictionless incline at angle theta where it runs into a spring of spring constant k [N/m]. When the block momentarily stops, it has compressed the spring by x [cm].
If the charges are separated by 20 cm, calculate the magnitude of the net electric field halfway between the charges?
If the velocity of your spaceship goes from 0.3c to 0.6c, then compute how much will your mass increases
A charge of q = +7.07 μC is placed in an electric field. Obtain the magnitude of the force on the charge
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