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Physics
Physics
High School
After a long day working in Gru's Lab, Stuart decides to go sunbathing at the beach and lies on a blanket facing up towards the sun. His skin temperature is 33 C and his total body surface area is 0.4 m 2. The emissivity of his body is 0.96 . The Boltzmann constant =5.6710Z^8W/m 2 K 4. Neatly show your calculations to the questions below. 33 C=306 K 1: The power radiated away by Stuart (in Watts) is 191 P= eo AT =0.96(5.6710 8 )(0.4m 2)(30bK) 4 191 W. Solar radiation falls on Stuart's body with a power per unit area of about 1200 W/m 2, but only his top-half is exposed to the sun. Assume that he absorbs this radiation with the same emissivity of 0.96 . 11: The radiative power absorbed by Stuart's body (in Watts) is P= Assume that Stuart loses heat only by radiation and not any other method. III: As he sunbathes, his body will settle to a final temperature (in Celsius) of Hint: Stuart will reach a final temperature when he emits radiation at the same rate as he absorbs/ So, use the absorbed power from Part ll to find the equilibrium temperature of his body.
Physics
High School
on the surface of the moon where acceleration due to gravity is less, a person's hang time would be
Physics
High School
determine the maximum number of flights the airline can schedule per day from chicago to los angeles and indicate the number of flights along each route.
Physics
High School
what is the orbital hybridization of a central atom that has two lone pairs and bonds to two other atoms? select the single best answer.
Physics
High School
describe the results of your coomassie-stained gel. what is in each lane? do you have multiple bands or single bands? why?
Physics
High School
what will happen if a short circuit occurs in the parallel branch of a series/parallel resistive circuit?
Physics
High School
determine (a) the absolute maximum value of live load moment and shear produced in the 50-ft girder and (b) the maximum value of moment at midspan. hint: for part (b) use the influence line for moment
Physics
High School
three waves are traveling along identical strings wave b has twice the amplitude of the other tow. wave c has 1/2 the wavelength than a and b. rank the frequences
Physics
High School
use equation 2 from the lab manual to predict the speed of sound (in m/s) in air at 29o c. never include units with a numerical answer.
Physics
College
Which statement describes a primary difference between an electromagnetic wave and a mechanical wave
Physics
High School
when a resistor is connected to a 12v source, it draws a 185ma
Physics
High School
ssuming all six springs are identical, rank the effective spring constant for the follow configurations and explain your reasoning.
Physics
High School
a body of mass 2.6 kg is pushed straight upward by a 27 n vertical force. what is its acceleration?
Physics
High School
what is the probability that a second sample would be selected with a proportion less than 0.06
Physics
High School
find the sensitivity of the closed loop system, t(s) = y (s) r(s) , to the parameter, k. in other words find s t k .
Physics
High School
Heliumneon laser light ( = 632.8 nm) is sent through a 0.280-mm-wide single slit. What is the width of the central maximum on a screen 2.00 m from the slit?A screen is placed 55.0 cm from a single slit, which is illuminated with light of wavelength 690 nm. If the distance between the first and third minima in the diffraction pattern is 3.30 mm, what is the width of the slit?
Physics
High School
in rutherford's famous set of experiments the fact that some alpha particles were deflected at large angles indicated that
Physics
High School
2. Determine the direction of the force acting on each particle below. Remember to use your right hand rule.
Physics
High School
which type of thermometer does not have to touch the surface of food to check the temperature accurately?
Physics
High School
During the flight, the air speed of a turbojet engine is 250 m/s. The ambient air temperature is - 14C. The exhaust gas temperature at the outlet of the nozzle is 610C. Corresponding enthalpy values for air and exhaust gas are respectively 250 kJ/kg and 900 kJ/kg. The fuel-air ratio is 0.0180. The chemical energy of the fuel is 45 MJ/kg. Heat loss from the engine is 21 kJ/kg of air. Calculate the velocity of the exhaust gas in m/s from the jet. Fuel Air- Exhaust Gas 1
Physics
High School
which electron in fluorine is most shielded from nuclear charge?
Physics
High School
determine the angular momentum h of the 6-lb particle about point o
Physics
High School
water has an unusually high electrical conductivity. heat of combustion. specific heat. heat of formation.
Physics
High School
determine the molarity of io3- in each of the five 12.00-ml equilibrium solutions. note the power of 10 in the x-axis label
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