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A 1.5-kg block B is connected by a cord to a 2-kg block A, which is suspended from a spring of constant 3 kN/m. Knowing that the system is at rest when the cord is cut, determine
(a) the frequency, the amplitude, and the maximum velocity of the resulting motion,
(b) the minimum tension that will occur in the spring during the motion,
(c) the velocity of block A 0.3 s after the cord has been cut.
a light-year is the distance light travels in one year (at speed=2.998x108m/s). Find what is the speed of light in AU/h
A spherical silver ball of radius 1 foot is set on a concrete pedestal as a lawn ornament. How big is the reflection of the hummingbird
A Carnot heat engine is to be designed with an efficiency of 81%. what is the temperature of the "hot" reservoir
A coil of 15 turns and radius 10.0 cm surrounds a long solenoid of radius 2.20 cm and 1.00 x 103 turns/meter. Find the induced emf (in volts) in the 15-turn coil as a function of time
A car moving with constant acceleration covered the distance between two points 59.5 m apart in 5.87 s. What was the speed at the first point
An electron (charge -e) is projected horizontally into the space between two oppositely charged parallel plates. The electric field between the plates is 462N/C upward.
Two tiny particles having charges of +7.00 C and -9.00 C are placed along the y-axis. The +7.00-µC particle is at y = 0.00 cm, and the other particle is at y = 40.00 cm. Where a third charged particle should be placed along the y-axis so that it does..
The mass of nitrogen molecule, N2, is 4x10^26 kg. What is its root mean square (rms) speed at 40 degrees Celsius
In an X-ray tube, electrons with energy 38 keV are incident on a cobalt (Z = 27) target. Compute the cutoff wavelength for X-ray production
A 5 kg mass is connected to a spring (1000 N/m) platform which undergoes simple harmonic motion in the vertical direction with two complete oscillations each second. What is the angular frequency of the box
A man falls over while ten pin bowling. He has a speed of 1.7 m/s and a mass of 81 kg. The coefficient of kinetic friction is 0.24. How far in metres does he slide from where he fell
A closely wound coil has a radius of 6.30 cm and carries a current of 1.70 A. How many turns must it have if, at a point on the coil axis 6.30 cm from the center of the coil, the magnetic field is 7.00 10-4 T?
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