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Question: The magnetic field of the Earth is approximately 0.5e-4 T. What current in a long straight wire would produce a field of equal strength at a distance of 7 cm from the wire?
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a boy and a girl are balanced on a massless seesaw. the boy has a mass of 75 kg and the girls mass is 50 kg. if the boy
A weight of 30.0 N is suspended from a spring that has a force constant of 190 N/m. The system is undamped and is subjected to a harmonic driving force of frequency13.0 Hz, resulting in a forced-motion amplitude of 5.00 cm. Determine the maximum valu..
The equation of mothionof a SHM oscillator is x= (.50m) sin(2pi f)t, where x is in meters and t is in seconds. what is the frequency of the oscillator?
A 3700-lb automobile (m = 1600 kg) starts from rest on a level road and gains a speed of 45 mi/h (= 72 km/h) in 33 s. What is the average net power delivered to the car during the 33-s interval
an electron in an x-ray machine is accelerated through a potential difference of 1.00 times 104 v before it hits the
A certain capacitor in a circuit has a capacitive reactance of 30.89 ohms when the frequency is 177 Hz. What capacitive reactance does the capacitor have
The energy required to dissociate 1 mol of O2 to form 2 mole oxygen is 118kcal. find the wavelength of the photon
Humans can detect a difference in sound instensity levels of 1.0dB. What is the ratio (louder to softer) of the sound intensities
an ideal transformer steps down 120 volts to 12.0 volts and the 2630- turn secondary supplies 12.0 amperes. What is the ratio output power to input power
Radioactive isotopes often occur together in mixtures. assume a 480 sample contains , with a half-life of 12 days, and , with a half-life of 4.5 days.
A mass is at rest on a spring in a liquid with density = 1500kg/m^3. The spring has a force constant of 200N/m, determine the density of the mass
a flare is dropped from an airplane flying horizontally at uniform velocity constant speed in a straight line.
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