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A person stands directly in front of two speakers that are emitting the same pure tone. The person then moves to one side until no sound is heard. At that point, the person is 5.40 m from one of the speakers and 5.46 m from the other. What is the frequency (in Hz) of the tone being emitted? (Assume air temperature to be 20°C.)
An astronaut orbits the earth in a space capsule whose height above the earth is equal to the earths radius. How does the weight of the astronaut in the capsule compare to her weight on earth?
You have 2 capacitors plus 1 resistor all hooked up in series. The value of R= 15 ohms and C1=C2= 1uf. Find the time constant T(tau)=RC
At the beginning of a basketball game, a referee tosses the ball straight up with a speed of 5.03 m/s. What is the minimum time that a player must wait before touching the ball
A 7 g bullet has a speed of 270 m/s and embeds itself into a 600 g block. How far does the block slide after the collision before coming to rest
If electrons are accelerated from rest in an electron gun by sending them through a potential difference of 11.0 kV, what is the resulting kinetic energy of each electron?
an 8.5 m long wire of resistance 20.6 \(\Omega\) carries a current of 6.6, What is the magnitude of the electric field in the wire
A student applies a 1.5 N horizontal force on a box of weight 20 N at rest on the floor. The coefficient of static pressure is 0.3. (a) Calculate the magnitude of the normal force acting on the box and (b) the magnitude of the static friction..
a heater coil connected to a 240 v ac line has a resistance of 58 .a what is the average power used?b what is the
0.0023 J of energy are stored in a parallel-plate capacitor whose plates each have area 0.30 m2, find the electric field energy density between the plates
At what frequency is this circuit in resonance? Find the impedance of this circuit if the frequency has the value found in part A, but the capacitance is increased to 0.275 μF.
Car A uses tires for which the coefficient of static friction is 1.1 on a particular unbanked curve. The maximum speed at which the car can negotiate this curve is 25 m/s. Car B uses tires for which the coefficient of static friction is 0.65 on the s..
A cord is used to vertically lower an initially stationary block of mass M kg at a constant downward acceleration of g/4. The block has fallen a distance d. (Use any variable or symbol stated above as necessary.) Discover the work done by the cord's ..
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