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Distinguish between organic chemistry and biochemistry. Tell the number of covalent bonds formed by an atom of each of these common elements in organic compounds: C, H, O, S, N, a halogen.
An alien spacecraft is flying overhead at a great distance as you stand in your backyard. You see its searchlight blink on for 0.190. The first officer on the spacecraft measures that the searchlight is on for 12.0.
A sound wave travels in air toward the surface of a freshwater lake and enters into the water. The frequency of the sound does npt change when the sound enters the water. The wavelength of the sound is 2.49 m in the air, and the temperature of bot..
A particle with a charge of -5.90 * 10^-9 C is moving in a uniform magnetic field B(vector) = -(1.25 T) k (hat). The magnetic force on the particle is measured to be F(vector) = -(4.00 * 10^-7 N) i(hat) + (7.60 * 10^-7 N) j(hat). Are there compone..
A 300g ball on a 70cm -long string is swung in a vertical circle about a point 200 cm above the floor, What was the tension in the string an instant before it broke
A spring (k = 812 N/m) ishanging from the ceiling of an elevator, and a 4.8 kg object is attached to the lower end. By how much does the spring stretch
the filament in an incandescent light bulb is made from tungsten. the light bulb is plugged into a 120 v outlet and
A toaster uses a Nicrhrome heating wire. When the toaster isturned on at 20o C, the initial current is 1.5A. A few seconds later, the toaster warms up and the current nowhas a value of 1.30A. The average temp coefficient ofresistivity for Nichrome is..
Oasis B is located 25 km east from oasis A. A camel starts from oasis A and travels 19.6 km in the direction 14.7 degrees south of east. Then it walks 8 km directly to the north. How far is the camel from oasis B?
A 8760-kg car is travelling at 27.8 m/s when the driver decides to exit the freeway by going up a ramp. What is the magnitude of the average drag force exerted on the car
A firecracker resting on a level street explodes into three pieces of equal mass. Immediately after the explosion, the first piece is moving north at 125 m/s, and the second piece is moving east at 75.0 m/sec. What is the velocity of the third piece ..
A U-shaped tube is partly filled with water and partly filled with a liquid that does not mix with water. what is the density of the liquid
A hot air balloon rises from the ground with a velocity of 1.8 m/s.A champagne bottle is opened to celebrate takeoff, expelling thecork horizontally with a speed of 4.0 m/s. How long does the cork remain in the air
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