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A 100 kg sled is slid across a smooth ice field by a group of four dogs tied to the sled pulling with a 350 N force along a rope at an angle of 20 degrees above the horizontal. (a) If the sled travels at a constant speed, find the drag force on the sled. (b) Find the work done by the dogs after pulling the sled for 1 km.
The average threshold of dark-adapted (scotopic) vision is 4.00 10-11 W/m2 at a central wavelength of 500 nm. how many photons per second enter the eye
At what angle should the road bank on the curve so that no frictional force is required by a vehicle travelling around the curve at the speed limit.
What velocity must be transferred to the spacecraft to crash it into the sun? Assume it is initially in a solar circular orbit, at the same distance from the sun as the Earth. What velocity must be transferred to the spacecraft so that it will escape..
An imaginary accelerator consists of colliding beams of electrons and protons, each of 2TeV total energy. What laboratory energy would be required to achieve the same center - of - mass energy if electrons collide with stationary protons?
The density of a 2.79-m long rod can be described by the linear density function ?(x) = 109 g/m + 10.1x g/m2. Determine the total mass of the rod
question1a bicycle wheel is rotating at 43 rpm while the cyclist begins to pedal harder giving the wheel a constant
The cohesive energy of a sodium chloride crystal is 6eV per ion pair, Neglecting the energy of repulsion, estimate the interionic spacing
A ball is held on an incline at the height of 72 cm. it is then released so that the ball rolls down the incline. At the bottom of the incline there is a loop where the ball rolls around in. If the loop is 62 cm high at its highest point what is the ..
An angler hangs a 4.52-kg fish from a vertical steel wire 1.65m long and 5.47×10?3cm2 in cross-sectional area. Calculate the amount the wire is stretched by the hanging fish
An RLC circuit consists of a 170 resistor, a 21.0 µF capacitor, and a 510 mH inductor, compute the phase angle between the current and the applied voltage
A spring is compressed by 0.0612 m and is used to launch an object horizontally with a speed of 1.64 m/s.at what angular frequency (in rad/s) would it oscillate
A thin cable 2m long with a mass of 100g is fixed at both ends. Its tension is 20N. What is the frequency of this mode of vibration
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