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A 70-kg crate is lowered from a loading dock to the floor using a rope passing over a fixed support. The rope exerts a constant upward force on the crate of 500N (a) Will the crate accelerate? explain (b) what are the magitude and direction of the acceleration of the crate?
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800 , length 89.6 and diameter 3.00 from a storage room to a machinist. Calculate the weight of the rod
A magnetic field is directed perpendicular to the plane of a 0.15-m × 0.30-m rectangular coil consisting of 240 loops of wire. To induce an average emf of –2.5 V in the coil, the magnetic field is increased from 0.1 T to 1.8 T through a time interval..
The width of the slit is slowly decreased. Once diffraction effects become evident, what happens as the slit gets narrower? Why is there no change in the pattern in the vertical direction? What do you suppose the pattern for a round hole would look..
Suppose that an ion source in a mass spectrometer produces doubly ionized gold ions (Au2+), each with a mass of 3.27 × 10-25 kg. Determine the radius of the path
Suppose a gas-filled incandescent light bulb is manufactured to have atmospheric pressure in it at 20.0°C. Find the gauge pressure inside such a bulb when it is hot
a massless pan hangs from a spring that is suspended from the ceiling. when empty the pan is 52 cm below the ceiling.
An unstrained horizontal spring has a length of 0.34 m and a spring constant of 240 N/m. Two small charged objects are attached to this spring, one at each end. The charges on the objects have equal magnitudes. Because of these charges, the spring..
The altitude of a hang glider is increasing at a rate of 6.61 m/s. At the same time, the shadow of the glider moves along the ground at a speed of 16.2 m/s when the sun is directly overhead. Compute the magnitude of the glider's velocity.
A jet airplane is in level flight. The mass of the airplane is m = 8910 kg. What is the magnitude of the lift force acting on the plane
Although the cross-sectional area of a capillary is much smaller than that of the aorta, there are many capillaries, so their total cross-sectional area is much larger. calculate the total cross-sectional area of the capillaries
A 15-uF capacitor is connected to a 50-V battery and becomes fully charged. What is the voltage across the capacitor's plates after the slab is inserted
The x position of (a) is 8.6 m. The y position of (b) is 8.68 m. The wave travels at a speed of 3.2 m/s. What is the amplitude of the wave?
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