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A 0.1kg ball is attached to a string and whirled around in a circle overhead. The string breaks if the force exceeds 60N. What is the maximum speed the ball can have when the radius of the circle is
A 0.49 copper rod with a mass of 0.18 carries a current of 13 in the positive x direction. Let upward be the positive y direction. What is the magnitude of the minimum magnetic field needed to levit
A 1.8-g balloon is filled with helium gas. When a mass of 4.8 g is attached to the balloon, the combined mass hangs in static equilibrium in midair. Assuming that the balloon is spherical, what is i
If the string were only 1/2 as dense as you found it to be how would the tension have to change in each case to produce the same number of segments (same wavelength)?
A wire with a current of 2.9 A is at an angle of 35.0 degrees relative to a magnetic field of 0.89 T. Find the force exerted on a 2.20m length of the wire.
A block of unknown mass is attached to a spring with a spring constant of 7.50 N/m and undergoes simple harmonic motion with an amplitude of 11.0 cm. When the block is halfway between its equilibriu
The coefficients of static and kinetic friction between the block and the plane are, respectively, 0.359 and 0.156. What value of F will move the block up the plane with constant velocity?
An air conditioner draws 13 A at 220V ac. The connecting cord is copper wire with a diameter of 1.528mm. a) If the total length of the wire is 17 how much power is dissipated in the writing?
Light of wavelength 659.9 nm is emitted by a star. The wavelength of this light as measured on Earth is 660.9 nm. How fast is the star moving with respect to Earth?
A proton Gun fires a proton from midway between two plates, A and B, which are separated by a distance of 0.1m. The proton initially moves at a speed of 150 km/s towards plate B. Plate A is kept at
A solid non-conducting sphere of radius 0.01m has a total charge 5C and a uniform charge distribution. Using Gauss's Law, determine the electric field (as a vector) in the regions r < 0.01m and r
Find the net force (magnitude and direction) acting on a 0.5C charge due to a 3C charge 1.2 meters away at an angle of 30 degrees (counterclockwise from the x-axis) and a -3C charge 2 meters away a
When the speed of the turntable is slowly increased, the object remains fixed on the turntable until a rate of 40 rpm is reached, at which point the object slides off. What is the coefficient of sta
What is a Lissajous figure? Be sure to (a) discuss how one is made, and (b) sketch an example of one.
There is an induced emf in the circuit causing the bulb to glow. How much power is being consumed by the bulb?
What is the potential difference across each capacitor? Express your answer using two significant figures. Enter your answers numerically separated by a comma.
If we wanted to find out how period and spring constant relate to each other how would we go about finding the spring constant with the formula F= kx if we have the length of the spring without a ma
A box is pulled up by a rope at a constant acceleration. If its mass 30 kg, its upward acceleration is 1.5 m/s2, and the vertical distance of travel is 17 m, what is the work done by the rope on the
The current in the coil had to be set to 0.512 A to set the electron beam exactly straight. If each coil has 62 turns and has a mean radius of 66.0 cm, calculate the component of the earth magnetic
An electron has a kinetic energy of 2.80 x 10-17 J. It moves on a circular path that is perpendicular to a uniform magnetic field of magnitude 5.30 x 10-5 T. Determine the radius of the path? (answer
An electron moves in a circular path perpendicular to a magnetic field of magnitude 0.255 T. If the kinetic energy of the electron is 4.70 10-19 J, find the speed of the electron and the radius of th
To travel at a constant 25.0 m/s speed, exerting a 480 N force to overcome air resistance and friction?