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A dentist uses a small mirror with a radius of 42 mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 15 mm from the tooth, what is the magnification of the image
Two people, on each side of a line directly in front of the window, in the row along the wall hear no sound. What minimum distance are they from each other?
A 0.10-kg object with a velocity of 0.20 m/s in the +x direction makes a head-on elastic collision with a 0.15 kg object initially at rest. What is the final velocity of the 0.10-kg object after col
An ocean liner leaves New York City and travels 20.6 ° north of east for 289 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the shi
A hollow aluminum cylinder is to be fitted over a steel piston. At 22°C the inside diameter of the cylinder is 99.2% of the outside diameter of the piston. To what common temperature should the
Find a relationship between the orders m1 and m2 that determines where a bright fringe of the green light coincides with a bright fringe of the blue light.
The wave length of an electromagnetic wave is measured to be 300m. (a) What is the frequency of the wave? (b) What type of EM wave is it?
The generator at a power plant produces AC at 48,000 V. A transformer step this up to 345,000 V for transmission over power lines. If there are 1000 turns of wire in the input coil of the transform
A closely wound rectangular coil of 80 turns has dimensions 25.0 rm cm by 40.0 rm cm. The plane of the coil is rotated from a position in which it makes an angle of 37.0 degrees with a magnetic fie
Rabbit runs in a straight line with a velocity of +1.4 m/s for a period of time, rests for 11 s, and then runs again along the same line at +0.64 m/s for an unknown amount of time. The rabbit trave
What is the smallest radius r that results in an intensity minimum at the detector? State your answer in terms of the given variables using vs for the speed of sound and π if necessary.
Lightning occurs when there is a flow of electric charge (principally electrons) between the ground and a thundercloud. How much charge flows between the ground and the cloud in this time?
Describe the events that take place to ensure that both the leading and lagging strand DNA synthesis occur with high accuracy (~1 mistake per million base pairs) and at the same rate by a single repli
An electric force of 4.0 N exists between two objects separated from each other by a distance of r. If the distance is decreased to 0.50r, calculate the magnitude of the force between the two objec
A -5.00nC point charge is on the axis at x= 1.20 m . A second point charge Q is on the x axis at -0.600m. What must be the sign and magnitude of Q for the resultant electric field at the origin to be
Write a paragraph about the result of the test of carbohydrates and lipids for benedict's test, lugol's test, uncoated paper test, sudan IV test, and Biuret test
A 4.00-kg model rocket is launched, expelling 54.0 g of burned fuel from its exhaust at a speed of 690 m/s. What is the velocity of the rocket after the fuel has burned? Hint: Ignore the external f
When we say that something gives us "energy," what does that mean? What is a biological definition of energy?
During a violent thunderstorm, hail the size of marbles (diameter = 1.6 cm) falls at a speed of 36 m/s. There are estimated to be 50 hailstones per cubic meter of air. Assume that, as for ice, 1 cm3
A proton is moving in the uniform electric field of part A. At point A, the velocity of the proton is 1.87×10^4 m/s, again pointed towards the east. What is the speed of the proton at point B?
A strictly aerobically respiring bacterium catabolizes glucose to co2. If a single cell of this organism has utilized 4 glucose molecules in this manner, how much net ATP has that cell produced by sub
The rocket fires for 10 mins , after which the asteroid is moving at 28 degrees to its original path at a speed of 20 km/h/. Find its average acceleration.
What Are the three types of work that a cell undergoes ?
Suppose you performed a gram stain on a sample from a pure culture of bacteria and observed a field of red and purple cocci. Adjacent cell were not always the same color. What do you conclude?
A young child grows rapidly, with high levels of cell division and high energy requirements.