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A spaceship travels at a constant speed from earth to a planet orbiting another star. When the spacecraft arrives, 13 years have elapsed on earth, and 9.4 years have elapsed on board the ship. Determine how far away is the planet, according to observers on earth?
The dielectric in a capacitor serves two purposes. It increased the capacitance, compared to an otherwise identical capacitor with an air gap, What is the maximum energy that can be stored if the plates are separated by a 0.50-mm-thick Teflon sheet
a motorcycle has a constant acceleration of 2.74 ms2. both the velocity and acceleration of the motorcycle point in the
In the absence of air resistance, a projectile is launched from and returns to ground level. It follows a trajectory similar to that , What is the new range
Is kinetic energy of a system conserved when two objects collide and stick together? What about the momentum of the system? What kind of collision is this (elastic or inelastic )?
question derive the expressions to find the wavelength of a particle of mass m and charge q accelerated through a
A 110-m-wide river flows due east at a uniform speed of 1.5 m/s. A boat with a speed of 8.5 m/s relative to the water leaves the south bank pointed in a direction 39o west of north. find the direction of the boat's velocity relative to the ground
During a stage production of Peter Pan, the 53.5 kg actress playing Peter has to fly in vertically (descend). Calculate the tension in the wire supporting the actor
A 65 {\rm kg} hiker climbs to the top ofa 450 {\rm m}-high hill. Ignoring the energy required for horizontal motion and assuming atypical efficiency for energy utilize by the body, how many frozen burritos would be needed to fuel this climb? Suppose ..
a box rests on the ice of a frozen pond. A man applies a horizontal force of 48 N to the box causing the box to accelerate at 3 m\s^2. What is the mass of the box
An Olympic skier moving at 20.0 m/s down a 30.0o slope encounters a region of wet snow, of coefficient of friction μk=0.740. Find how far down the slope does she go before stopping
A parallel-plate capacitor has the volume between its plates filled with plastic with dielectric constant K. Use Gauss's law to calculate the magnitude of the electric field in the dielectric
Lonnie pitches a baseball of mass 0.20 kg. The ball arrives at home plate with a speed of 40 m/s and is batted straight back to. Lonnie with a return speed of 60 m/s. If the bat is in contact with the ball for 0.050 s, what is the impulse experienced..
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