Physics

(20) A rocket is launched vertically. At time t = 0 seconds, the rockets engine shuts down. At the time, the rocket has reached an altitude of 500m and is rising at a velocity of 125 m/s. Gravity then takes over. The height of the rocket as a function of time is h(t)=-9.8/2 t^2+125t+500,t>0. Using your function file from HW2A: Generate a plot of height (vertical axis) vs. time (horizontal axis) from 0 to 30 seconds. Include proper axis labels. Find the maximum height and the time at which it occurs: Analytically, showing your steps and equations. This part should be done entirely in the write-up: no coding Using the data cursor on the plot. Using the MAX function on your data from part (a) Using FMINSEARCH on your m file Comment on the differences between the methods. How closely does each method match the "true" (analytical) value? Find the time when the rocket hits the ground: Analytically, showing your equations. This part should be done entirely in the write-up: no coding Using the data cursor on the plot. Using FZERO on your m file Comment on the differences between the methods in each of part (B) and (C). How closely does each method match the "true" (analytical) value? Use a quantitative comparison to make your argument.
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Which of the following is NOT an important factor in selecting a medical professional?AcostB accessibilityC. locationDappearancePlease select the best answer from the choices providedCD
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Please help! I'll mark you as branliest!!! :)
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The spaceship Lilac, based on the Purple Planet, is 721 m long when measured at rest. When the Lilac passes Earth, observers there measure its length to be 661 m. At what speed v is the Lilac moving with respect to Earth? Express your answer as a multiple of the speed of light c.
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An RV is traveling 60 km/h along a highway at night. A boy sitting near the driver of the RV turns a flashlight on and shines it at another boy at the back end of the RV.
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A microwave oven uses a current of 0.45 Amps in a voltage of 120 Volts how much power does a microwave use?
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O raz de lumin cade sub un unghi de inciden i=30 pe o suprafaplan ce separ dou materiale transparente cu indici de refracie n 1 = 1,60i n 2 = 1,40.Calculai unghiul de refracie (din mediul cu indicele de refracie mai mic).Sugestie: sin 30 = .
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What is the major difference between herbal and conventional medicines
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A 5.00 cm tall object is placed 4.25 cm from a lens and produces an image that is 3.00 cm behind the lens. What is the magnification of the lens?
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What would happen to a current in a circuit if the resistance is multiplied by four
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Which is a true statement?A.Valence electrons play a key role in chemical reactions.B.The properties of elements in a group are identical.C.Hydrogen contains multiple valence electrons.
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A rectangular loop of wire that can rotate about an axis through its center is placed between the poles of a magnet in a magnetic field with a strength of 0.40 T. The length of the loop L is 0.16 m and its width w is 0.040 m. What is the magnetic flux through the loop when the plane of the loop is perpendicular to the magnetic field?
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The activity of a radioactive material drops to 1/16 of its original value in 20 years. What is its half life?
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A cobalt-60 source with activity 2.6010-4 Ci is embedded in a tumor that hasmas 0.20 kg. The source emits gamma photons with average energy 1.25 MeV.Half the photons are absorbed in the tumor, and half escape.i. What energy is delivered to the tumor per second? [4 marks]ii. What absorbed dose, in rad, is delivered per second? [2 marks]iii. What equivalent dose, in rem, is delivered per second if the RBE forthese gamma rays is 0.70? [2 marks]Page 6 of 7iv. What exposure time is required for an equivalent dose of 200 rem? [2marks]B. A laser with power output of 2.0 mW at a wavelength of 400 nm is projectedonto a Calcium metal. The binding energy is 2.31 eV.i. How many electrons per second are ejected? [6 marks]ii. What power is carried away by the electrons? [4 marks]C. A hypodermic needle of diameter 1.19 mm and length 50 mm is used towithdraw blood from a patient? How long would it take for 500 ml of blood to betaken? Assume a blood viscosity of 0.0027 Pa.s and a pressure in the vein of1,900 Pa. [10 marks]D. A person with lymphoma receives a dose of 35 gray in the form of gammaradiation during a course of radiotherapy. Most of this dose is absorbed in 18grams of cancerous lymphatic tissue.i. How much energy is absorbed by the cancerous tissue? [2 marks]ii. If this treatment consists of five 15-minute sessions per week over thecourse of 5 weeks and just one percent of the gamma photons in thegamma ray beam are absorbed, what is the power of the gamma raybeam? [4 marks]iii. If the gamma ray beam consists of just 0.5 percent of the photonsemitted by the gamma source, each of which has an energy of 0.03MeV, what is the activity, in Curies, of the gamma ray source? [4 marks]E. A water heater that is connected across the terminals of a 15.0 V power supplyis able to heat 250 ml of water from room temperature of 25C to boiling pointin 45.0 secs. What is the resistance of the heater? The density of water is 1,000kg/m2 and the specific heat capacity of water is 4,200 J/kg/C. [10 marks]
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Matter in which particles are arranged in repeating geometric patterns is a ______.Question 9 options:solidliquidgasplasma
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Which has the deers image? Why?
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which one of the following statements is true? A.in an elastic collision,only momentum is conserved B. in any collision,both momentum & kinetic energy are conserved C.in an inelastic collision,both momentum & kinetic energy are conserved D.in an elastic collision,only kinetic energy is conserved
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What spectacles are required for reading purposes by a person whose near point is 2.0m
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explain nuclear fusion briefly
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Two identical speakers are 3.50 m and 5.20 m from a listener. What is the lowest frequency (n = 1) that would cause constructive interference there? PLS HELP!
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In terms of forces, what makes the arrow start moving?
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30. Which of the following represents thestatement "The difference of two squarenumbers is positive
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The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (allow)st = 200 mpa for the steel and ( allow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.
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This experiment is to see if water flows faster out of a smaller can or a larger can.You will need: two cans (one quite small like a soup can and the other large, like a juice, can.)Follow these steps:A. Remove the top of each can. Punch a hole in the side of each can, very close to the bottom, making sure the holes are equal in size. Cover each hole with a piece of tape, and place the cans next to the sink.B. Put water in both cans, making sure the water is at the same level - different amounts, but the same level. Turn the cans so the holes are facing into the sink, and remove the tape at the same time. Answer these questions: Do the streams of water shoot out at the same distance? Why or why not?C. Try the same experiment, but this time put one cup of water in each can. Whathappens to the streams of water now?D. Try the same experiment, but this time fill both cans to the top. What happens to the streams of water?
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