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An artist friend of yours needs help hanging a 500 lb sculpture from the ceiling. For artistic reasons, she wants to use just two ropes. One will be 30o from vertical, the other 60o . She needs you to determine the smallest diameter rope that can safely support this expensive piece of art. On a visit to the hardware store you find that rope is sold in increments of 1/8 inch diameter and that the safety rating is 4000 pounds per square inch of cross section.
A. What size (diameter) rope should you buy?
Electric circuit consists of battery (with emf ε), resistor R and capacitor with initial capacitance C0, all connected in series as shown on the picture. The system has been connected as shown for some time, when abruptly, the capacitance is instanta..
The critical angle for total internal reflection at a liquid-air interface is 45.0^\circ. what angle does the refracted ray in the air make with the normal
What is the flux of Zn moving down the rod? Write down all your assumptions (hint: you will need to look up the density of copper. You do not need to account for the variation in density with alloy composition). Clarify what the boundary conditions w..
A telescope that has a 80 centimeter focal length objective and a 3.50 centimeter focal length eyepiece. Obtain the distance between the objective and eyepiece lenses
You have annoyed the local crime boss who has had his thugs nab you and dump you in the trunk of a Lincoln. In searching you, they missed the smart phone in your pocket. You turn on your phone and get a GPS fix.
A neutron moved through a 1 T field with a speed of 185849 m/s. The velocity of the neutron is perpendicular to the field. Calculate the magnetic force on the neutron
A 50 kg skater pushes off horizontally for a distance of 0.4m witha force of 150N. If she travels 80m before stopping, what is the coefficient of friction
The temperature of a gold bar rises by 10.0°C when it absorbs 0.677 kJ of energy by heat. The mass of the bar is 525 g. Determine the specific heat of gold from these data
A 20,000 ohm resistor and a capacitor are connected in series and then a 15v potential differnce is suddenly applied across them. what is the capacitive value of the capacitor
if the human body has a total surface area of 1.20 m2 and the surface temperature is 30degc find the total net rate of
You hold a small plane mirror 0.50 m in front of your eyes, Find the height of the bottom of the mirror such that the lowest point the person can see on the building is 22.9 m above the ground
at the science olympiad competition a group of middle school students uses a trebuchet that launches a tennis ball from
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