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You are researching personal watercraft (PWC) safety. These vehicles have a well known safety issue in which the rider loses stearing control when there is no thrust from the engine. You want to know for what distance the rider loses control when the machine loses thrust at top speed. The particular PWC you are testing weighs 635 lbs (has mass 288 kg) and has a top speed of 7.0 × 101 mph (31 m/s). It takes 2.0 × 101 s for the watercraft to slow to a safe 2.25 mph (1 m/s). What is the distance covered in that time? Ignore air resistance.
A spherical object has an outside diameter of 50.0cm. Its outer shell is composed of aluminum and is 0.800cm thick. Determine the object's average density
What is the resistance of a lightbulb that uses an average power of 55.0 W when connected to a 60.0 Hz power source having a maximum voltage of 180 V
A wooden cylinder of length 2.0m and cross section 78cm^2 is suspended in vertical positionwith a string of length 2.5m. Find the linear density of the string
You work for a moving company and are given the job of moving two crates (masses are 130kg and 280kg) held together by a rope attached between the two. You pull on a rope attached to the larger crate giving the system the acceleration of 0.29m/s2. Wh..
The owner of a van installs a rear-window lens that has a focal length of -0.310 m. When the owner looks out through the lens at an object located directly behind the van, How far from the van is the object actually located
A 3.0 kg block is initially at rest on a horizontal frictionless surface when a horizontal force in the positive direction of an x axis is applied to the block. What is the kinetic energy of the block as it passes through x = 4.3 m
A 10-cm-diameter cylinder of helium gas is 20 cm long and at 20°C. The pressure gauge reads 120 psi. what is the mass of the helium
A 2.0-nF parallel plate capacitor with a sheet of mylar (k = 3.1) filling the space between the plates is connected to a 90 V battery. Determine the change in the charge on one of the plates
A jet with mass m = 130000.0 kg jet accelerates down the runway for takeoff at 1.5 m/s2. What is the net horizontal force on the airplane as it accelerates for takeoff
Just as you are about to step into a nice hot bath, a small earthquake rattles your bathroom. Immediately afterward, you notice that the water in the tub is oscillating. What is the wavelength of this standing wave
In a purely inductive AC circuit, L=25.0 mH and the rms voltage is 150 V. Calculate the inductive reactance and the rms current in the circuit
In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is approximately 1.95 106 m/s. Find the centripetal acceleration of the electron
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