An electron has de Broglie wavelength 2.78×10-10 m . Part A Determine the magnitude of the electron's momentum pe. Express your answer in kilogram meters per second to three significant figures. ▸ View Available Hint(s) VG ΑΣΦ 24 Pe 2.29 10 . Submit Previous Answers ? × Incorrect; Try Again; One attempt remaining kg. m/s
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- 3. The equation 1.45 in our textbook says that the de Broglie wavelength as a function of temperature is given by 1 Assuming the accepted accuracy for h, R, and m are very high, what is the V3MRT maximum uncertainty in the de Broglie wavelength if AT is the uncertainty in temperature?A photon has an energy of 1.9 meV (milli electron Volt). What is the wavelength of this photon, expressed in micrometers? Keep four significant digits. And the answer is NOT 6.543Physics A distance R is measured to be 5.400±0.003m. What is the absolute uncertainty in R^-2?
- min where Given the equation p= m =13.75±0.06 and n =0.0787+0.0007. What is the absolute uncertainty in P? Select one: O a. 285±5 O b. 285±8 O c. 285+7 O d. 285±6L Review View sert Design Layout References Mailings Tell me what you want to do... AaBbCcI AaBbCcD AaBbCcI to 12 Á Á Aª- ◊ §·E·† Aa- - ALT - E abc X₂ X² Aay-A· ==== #· 2.E. 1 Normal TVS Table... 1 No Spac... Font Paragraph F Styles Measure the following quantities: • R- Range (at the location where projectile hits the ground) T-Flight Time (at the location where projectile hits the ground) • H - Maximum Height (at the peak of the projectile) Th-Time at Max Height (at the peak of the projectile) Max. Time to Launch Launch Speed Angle Range Flight R Time Height Max. 0 Tf H Height sin 0 (m/s) (s) (m) Th (degree s) (s) 25 17.57 1.29 0.58 0.1 15 35 21.55 0.81 0.1 Cos ( tan 0 17 M. P DE S1:54 O KB/S ul . 52 %3D s the the g With a wooden ruler, you measure the length of a rectangular piece of sheet metal to be 16 mm. With micrometer calipers, you measure the width of the rectangle to be 8.98 mm. Use the correct number of significant figures: What is (a) the area of the rectangle; (b) the ratio of the rectangle's width to its length; (c) the perimeter of the rectangle; (d) the difference between the length and the width; and (e) the ratio of the length to the width? Your answer
- 68. Alveoli are tiny sacs of air in the lungs. Their average diameter is 5.20×10−5 m. Calculate the uncertainty in the velocity of an oxygen molecule (5.30×10−26 kg) trapped within a sac. Enter your answer in scientific notation. (Hint: The maximum uncertainty in the position of the molecule is given by the diameter of the sac.)e2f_h. g= 4 e =7.83±0.04 f =0.204±0.007. h=14.14+0.05 and i=3.99±0.03- Given the equation where What is the absolute uncertainty in g? Select one: 1.35+0.02 a. O b. 1.4±0.1 Oc. 1.4+0.2 O d. 1.35±0.011. A student is using a track photogate to determine the time it takes her to run 50 meters. She records the following times: Trial Time (seconds) 1 5.420 5.464 3 5.728 4 5.496 5 5.644 6. 5.794 7 5.540 The data she collects has a mean of 5.583714 seconds, with an absolute uncertainty computed to be 0.141074 seconds. Report her 50-meter time as a confidence interval (а) using the mean and the absolute uncertainty given above. Another student measures his 200-meter run time (b) to be 20.7 ± 0.3 seconds. Report the relative uncertainty of each student and identify which has the more precise run time.
- The accepted value of the density of aluminum is 2.70 g/cm3 while our computed value is 2.8 g/cm3 . What is the percent uncertainty of our experimental density (observing correct significant figures)? a. 0.037 b. 3.7 c. 3.70 d. 4d. A satisfactory radiograph is made using 30 mAs at 72 inches SID. How many mAs are needed to produce a similar radiograph at 84 inches SID? e. A satisfactory radiograph is made using 12 mAs at 40 inches SID. How many mAs are needed to produce a similar radiograph at 72 inches SID?of 1 estion Given the equation f =- where = 3.43±0.78. What is the value and the absolute uncertainty in f (with the correct number of significant figures)? Select one O 0.2 Ob. 0.78 0.8 Od 1.26 O 1 Clear my choice If the length of an object is /=18.0±0.2cm What is the object's length in units of 772? There are 100cm in 1 m Select one: O 0.2±0.2m Ob. 0 1800+20m d. 0.180+0.002m Clear my choice 0.000180±0.000002m