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1. Explain why you are safe and unaffected inside a car that is struck by lightning. Also explain why it might not be safe to step out of the car just after the lightning strike, with one foot in the car and one on the ground. ( Note that it is current that kills; a rather small current passing through the region of the heart can be fatal).2. The electric field on a closed surface is due to all the charges in the universe, including the charges outside the closed surface. Explain why the total flux nevertheless is proportional only to the charges that are inside the surface, with no apparent influence of the charges outside.
A 12 DC power supply is connected to the primary coil of a transformer. What is the rms voltage across the secondary
A 300 bird flying along at 6.0 m/s sees a 7.0 g insect heading straight toward it with a speed of 25m/s (as measured by an observer on the ground, not by the bird). The bird opens its mouth wide and enjoys a nice lunch. What is the bird's speed immed..
An archer wishes to shoot an arrow at a target at eye level a distance of 43.5 m away. what angle should the arrow make with the horizontal
A 5.0-kg object is pulled along a horizontal surface at by a 15 N force acting 20? above the horizontal. How much work is done by the gravitational force
Presume a spherical planet P has a uniform density of 4.72 x 10^3 kg/m^3 and a radius R = 3604km. For a parcel that weighs 64N on the surface of the spherical Earth.
A double slit experiment produces 25 highlight spots with total distance y = 21cm, What is the wavelength of the laser source
A 49g marble moving at 1.9m/s strikes a 24g marble at rest. What is the speed of the first marble immediately after the collision
A 1050 kg car is traveling at a speed of 25 m/s when the driver sees that there is a tree across the road. how far does the car travel before it comes to a stop
A device used in radiation therapy for cancer contains 3.10×10-1 g of cobalt 2760Co (59.9333819 u). Determine the activity of the radioactive material
A point charge causes an electric flux of -670 N·m2/C to pass through a spherical Gaussian surface of 18.0 cm radius centered on the charge. What is the value of the point charge
A doubly charged helium atom, whose mass is 6.6*10^-27 kg, is accelerated by a voltage of 3000 V. What will be its radius of curvature in a uniform 0.300 T field
A mass spectrometer applies a voltage of 2.00 kV to accelerate a singly charged positive ion. A magnetic field of B = 0.400 T then bends the ion into a circular path of radius 0.305 m. What is the mass of the ion?
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