JH

I recently had an oral surgery and stitches inside my mouth, and they are starting to dissolve before the 7 days the doctor told me it would take. Should I be concerned.

I received an insurance claim in the mail, but was not involved in a car accident. I do park my car at a park and ride location and guess that maybe someone hit my car but I never saw any note or anything. Would I be liable for anything?

I did not have any income for 2011.

Explain what happens to the following in a recession, particularly the Great Recession:

a) The demand for new homes

b) The demand for existing homes

c) The supply of new homes

d) The supply of existing homes

An observer in reference frame S sees two events as simultaneous. Event A occurs at the point (41.0 m, 0, 0) at the instant 9:00:00 Universal time on January 15, 2001. Event B occurs at the point (120 m, 0, 0) at the same moment. A second observer, moving past with a velocity of 0.800c, also observes the two events. In her reference frame S ', which event occurred first and what time interval elapsed between the events?

An electromagnetic wave with a photon energy of 4.6 x 10^3 eV is able to excite inner-shell electrons in heavy nuclei. Calculate the frequency of this radiation.

With young children and the elderly, use of a traditional fever thermometer has risks of bacterial contamination and tissue perforation. The radiation thermometer works fast and avoids most risks. The instrument measures the power of infrared radiation from the ear canal. This cavity is accurately described as a black body and is close to the hypothalamus, the body's temperature control center. Take normal body temperature as 37.0°C. If the body temperature of a feverish patient is 38.5°C, what is the increase in radiated power from his ear canal?

A refrigerator shelf is an array of parallel wires with uniform spacing of 10.50 cm between centers. In air at 20°C, ultrasound with a frequency of 11.0 kHz from a distant source falls perpendicularly on the shelf.

Find the number of diffracted beams leaving the other side of the shelf. Find the direction of each beam.

The nickel's image has 2.2 times the diameter of the nickel and is 2.85 cm from the lens. Determine the focal length of the lens.

Consider a common mirage formed by super-heated air just above a roadway. A truck driver whose eyes are 2.00 m above the road, where n = 1.0003 looks forward. She perceives the illusion of a patch of water ahead on the road, where her line of sight makes an angle of 1.30° below the horizontal. Find the index of refraction of the air just above the road surface. (Suggestion: Treat this problem as one about total internal reflection. Give your answer to 5 decimal places.)

A 4.00 m long pole stands vertically in a lake having a depth of 2.50 m. The Sun is 38.0° above the horizontal. Determine the length of the pole's shadow on the bottom of the lake. Take the index of refraction for water to be 1.33

Suppose you are located 184 m from a radio transmitter.

(a) How many wavelengths are you from the transmitter if the station calls itself 1150 AM? (The AM band frequencies are in kilohertz.)

(b) What if this station were 98.1 FM? (The FM band frequencies are in megahertz.)

An earthquake on the ocean floor in the Gulf of Alaska produces a tsunami (sometimes incorrectly called a "tidal wave") that reaches Hilo, Hawaii, 4,450 km away, in a time interval of 9 h 30 min. Tsunamis have enormous wavelengths (100 to 200 km), and the propagation speed for these waves is shown below , where is the average depth of the water.

From the information given, find the average wave speed and the average ocean depth between Alaska and Hawaii. (this method was used in 1856 to estimate the average depth of the Pacific Ocean long before soundings were made to give a direct determination.)

Ultrasound is used in medicine both for diagnostic imaging and for therapy. For diagnosis, short pulses of ultrasound are passed through the patient's body. An echo reflected from a structure of interest is recorded, and from the time interval for the return of the echo the distance to the structure can be determined. A single transducer emits and detects the ultrasound. An image of the structure is obtained by reducing the data with a computer. With sound of low intensity, this technique is noninvasive and harmless. It is used to examine fetuses, tumors, aneurysms, gallstones, hearts, and many other stuructures. To reveal details, the wavelength of the reflected ultrasound must be small compared with the size of the object reflecting the wave.

a) What is the wavelength of ultrasound with a frequency of 2.4 MHz, used in echo cardiography to map the beating heart?

b) In the whole set of imaging techniques, frequencies in the range of 1.00 to 20.0 MHz are used. What is the range of wavelengths corresponding to this range of frequencies? The speed of ultrasound in human tissue is about 1500 m/s (nearly the same as the speed of sound in water).

A simple pendulum with a length of 2.83 m and a mass of 6.54 kg is given an initial speed of 3.06 m/s at its equilibrium position

(a) Determine its total energy

(b) Determine its maximum angular displacement. (For large v, and/or small l, the small angle approximation may not be good enough here)

A simple pendulum with a length of 2.83 m and a mass of 6.54 kg is given an initial speed of 3.06 m/s at its equilibrium position.

(a) Assuming it undergoes simple harmonic motion, determine its period.

(b) Determine its total energy

(c) Determine its maximum angular displacement.

I found (a) to be 3.37 seconds, but I don't know how to get te rest

A vibration sensor, used in testing a washing machine, consists of a cube of aluminum 1.50 cm on edge mounted on one end of a strip of spring steel (like a hacksaw blade) that lies in a vertical plane. The strip's mass is small compared with that of the cube, but the strip's length is large compared with the size of the cube. The other end of that strip is clamped to the frame of the washing machine that is not operating. A horizontal force of 1.35 N applied to the cube is required to hold it 3.00 cm away from its equilibrium position. If it is released, what is its frequency of vibration?

1. How many acetyl CoA's will come from a 18 carbon acyl-CoA?

2. How many propionyl-CoA's come from a 19 carbon acyl-CoA?

3. How many rounds of beta-oxidation will a 18 carbon acyl-CoA go through?

Cellulose and starch are almost identical molecules, yet we cannot digest cellulose. Why?

a) Cellulose is highly branched, which makes it harder to break down

b) Cellulose is a long polysaccharide composed of thousands of glucose residues

c) We only make the enzyme necessary for breaking down the glycosidic linkages in starch and not cellulose

d) All of the above

e) None of the above because we can digest cellulose but not starch

A monosaccharide that is in the b form has its -OH on the anomeric carbon on the same side of the ring structure as the terminal C.

a) True

b) False

Linear monosaccharides can have an anomeric carbon

a) True

b) False

1. The zwitterion for Q:

a) represents Glutamtic acid with a net charge of -1

b) represents Glutamic acid with a net charge of 0

c) represents Glutamic acid with a net charge of -1

d) represents Glutamine with a net charge of 0

e) represents Glutamine with a net charge of +1

2. Which of the following amino acids has a side chain that will most likely interact with the side chain of D at a physiological pH?

a) H

b) R

c) K

d) All of the above

e) Both b and c

3. At pH 9.5, the net charge of Lys is most likely:

a) -2

b) -1

c) 0

d) +1

e) +2