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Joe has a ring weighing 13 grams made of an alloy of 16 silver and the rest gold. He decides to melt down the rings and add enough silver to reduce the gold content to 69 . How many grams of silver
The force she exerts is 35 N at an angle of 55° above the horizontal. Find the coefficient of kinetic friciton between the flight bag and the floor.
What strategies do other organisms have that allow them to live in environments that are hypertonic to their cytoplasm?
Released from rest at the same height, a can of frozen juice rolls to the bottom of the same hill. What is the translational speed of the frozen juice can when it reaches the bottom?
A bucket is made from thin sheet metal. The bottom and top of the bucket have radii of 21.0 cm and 39.0 cm, respectively. The bucket is 30.0 cm high and filled with water. Where is the center of gr
What properties allow phospholipids to form membrane bilayers? Why can't a fatty acid do this?
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800 kg/m^3 , length 90.3 cm and diameter 2.55 cm from a storage room to a machinist. Calculate the weight of the rod, w
What happened when f2 pea plants are allowed to self breed
Segmentation moves chyme in only one direction
Under these simplified conditions, what value must the safety factors exceed to prevent pancake collapse of the building?
In an 8.00 km race, one runner runs at a steady 11.0 km/h and another runs at 14.3km/hr. How far from the finish line is the slower runner when the faster runner finishes the race?
What is the pattern in the data from Seeley's field experiment?
Explain the difference in the number of drops needed between the water and alka seltzer
Consider two straight conductors of length 0.8 m, carrying current of 15.8 A and 11 A respectively. If they are placed 0.2 m apart, what is the value 106 F, where F is the magnitude of the force in
When a guitar string is sounded along with a 449 Hz tuning fork, a beat frequency of 5.00 Hz is heard. When the same string is sounded along with a 448 Hz tuning fork, the beat frequency is 6.00 Hz
At t=0, the block is moving in the positive direction of the axis, with a speed of 3.0 m/s. what are its (a) speed and (b) direction of travel at t=11 s?
Unlike squamous cells, cuboidal and columnar cells have large, open cytoplasm's. Which of the functions of epithelial tissue are supported by having such big cells?
Express the total force exerted on the tower by the three cables in terms of components.
Describe the difference between euchromatin and heterochromatin.
A 0.250 kg block on a vertical spring with a spring constant of 5.00 x 103 N/m is pushed downward, compressing the spring 0.100 m. When released, the block leaves the spring and travels upward vert
Determine the work done on the object by this force as it moves in a straight line from the origin to vector r =(12.0 i hat + 22.0 j hat) m.
Find the displacement of a simple harmonic wave of amplitude 9.60 m at t = 0.71 s. Assume that the wave number is 2.34 m -1, the angular frequency is 2.88 rad/s.
A book with a mass of 2.0kg is held in equilibrium on a board with a slope of 60 degrees by a static frictional force. what is the frictional force exerted on the book?
1. What are possible sources of the microorganisms in the bean water?
A 1500 {rm kg} car skids to a halt on a wet road where mu_k = 0.50. How fast was the car traveling if it leaves 66-{rm m}-long skid marks?