PHY 251 TEST 1 FA23 (1)

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Indicate to what decimal position readings should be recorded (nearest 0.1, 0.01, etc.)for measurements made with the following devices.a. A thermometer with a smallest scale marking of 1°Cb. A graduated cylinder with a smallest scale marking of 0.1 mLc. A volumetric device with a smallest scale marking of 10 mLd. A ruler with a smallest scale marking of 1 mm

er B. Graphing Exercises: Construct a graph for each of the following sets of data. Using the graphs that you make, answer the questions below for each graph. 1. Students measured the mass and the volume of various samples of a metal and the results below were obtained. Mass (grams) Volume (cubic centimeters) or cm3 ()1.5 12.3 28.5 3.5 frie 42.0 5.0 59.5 7.3 (S) 78.2 9.6 12.0 99.0 What basis observation can be made concerning the mass-volume relationship? a. Page 9 of 12 Lab 2

Answer..

34. The mass of a sample of nickel is 11.74 g.  It contains   A. 4.287 x 1022 atoms   B. 1.205 x 1023 atoms   C. 1.174 x 1023 atoms   D. 1.869 x 1023 atoms   E. 3.256 x 1023 atoms

A1

1 The accepted density of water at room temperature is approximately 1.0 g/mL. Melody and Margaret were told by their professor to measure 7.0 mL of water, which should theoretically weigh 7.0 grams. They first measured the volume of water in a graduated cylinder to be 7.0 mL and then the students weighed the water and they obtained a mass of 6.85 grams. First, calculate the density of their sample of water and then calculate their percent error for density. 2. A science teacher tells her class that their final project requires the students to measure a specific variable and determine the velocity of a car with no more than 2.5% error. Jennifer and Johnny work hard and decide the velocity of the car is 34.87 meters/second. The teacher informs them that the actual velocity is 34.15 meters/second. Will Jennifer and Johnny pass their final project.

The pharmacy receives an order for a 30 day supply of Lasix 10 mg/tab to be given four times a day. How many tablets must you prepare? O a. 70 tablets O b. 120 tablets O c. 01 tablets O d.50 tablets O e. 100 tablets

Among the following the largest mass is O a. 75000 mg O b. 0.075 kg O . 7500 g O d. 750 ug

b. Determine values of L, ML, S, and Ms for a doublet P term.

C. d. 554 mk/s 2.554 mg/mL K/s g/L µK/ms µg/mL

A. How Close? Directions: Compute the percent error for each of the experiments. Assume that the observed value is the mean of the measurements. Express your answer up to 2 decimal places. 8 True Value 124 g True Value 1.75 lb 1. 120 g Trial # 1 2.75 lb Trial # 1 Trial # 2 121 g Trial # 2 2.76 lb Trial # 3 120 g Trial # 3 2.78 lb True Value 1.15 L True Value 0.15 m 2. 7. Trial # 1 0.95 L Trial # 1 0.09 m Trial # 2 1.16 L Trial # 2 0.23 m Trial # 3 1.26 L Trial # 3 0.36 m True Value 766 atm True Value 1.43 cm 3. Trial # 1 765.9 atm 8. Trial # 1 1.44 cm Trial # 2 765.8 atm Trial # 2 1.42 cm Trial # 3 766.4 atm Trial # 3 1. 40 cm True Value 10.1 N True Value 9.81 m/s² 4. 9. Trial # 1 7 N Trial # 1 14 m/s? Trial # 2 3 N Trial # 2 8 m/s? Trial # 3 5 N Trial # 3 11 m/s? True Value 15 psi True Value 36.5°C 5. 10. Trial # 1 20 psi Trial # 1 37.2 °C Trial # 2 21 psi Trial # 2 36.1 °C Trial # 3 19.5 psi Trial # 3 35. 7 °C

Consider the equation a=6πb/q√17 relating the variables a, b and q. If a scientist does an expirment in which b is held constant, q is varied, and a is measured.    A. Identify the independent and dependent variables.  B. What functional relationship is being testing? C. What should be plotted in order to confirm this relationship? (order matters)

Pls help ASAP. Pls show all work and calculations.

Follow Significant Figures rules and Scientific Notation for all steps of the solution just for Question 1. Question 1 Gold, which has a mass density of 19.32 g/cm³, is the most ductile metal and can be pressed into a thin leaf. If a sample of gold, with a mass of 27.63 g, is pressed into a leaf of 1.000 μm thickness, what is the area of one side of the leaf? Note: Volume of the leaf is area of one side times the thickness.

The table data: 15 1.75 13 1.63 11 1.5 9 1.35 7 1.19 5 1.01 3 0.78 A. Graph these data B. Describe the graph C. Using the data, calculate 1/2t^2 and complete table 2 below

A cylindrical storage tank has a radius of 1.06 m. When filled to a height of 3.67 m, it holds 12600 kg of a liquid industrial solvent. What is the density of the solvent? Number i Units

The question is at the picture. Answer should be round off to 2 decimal points with units.

1A. A cylindrical tube 9.5 cm high and 0.85 cm in diameter is used to collect blood samples. How many cubic decimeters (dm³) of blood can it hold? The volume of a cylinder is given by ar?h,r = radius and h = length. 1B. A cylindrical rod formed from silicon is 16.8 cm long and has a mass of 2.17 kg. The density of silicon is 2.33g/mL. What is the diameter of the cylinder? Hint: the volume of a cylinder is given by ar?h, r = radius and h = length.

Which option is ir

The average mass of a human liver is 1.5 KG.  convert this quantity to. A. Grams B. Ounces.

Problem 19. Must use formula from formula sheet. Not sure which one or where to start.

A batch of concrete consisted of 200lb fine aggregate, 350 lbs course aggregate, 94 lb cement and 5 gallon of water. Assuming SG of sand and gravel is 2.65 and that of cement is 3.10.   a. What is the total volume? b. How much by weight of cement is required to produce one cubic yard?

An iron casting containing a number of cavities weighs 5.75E+3 N in air and 4.01E+3N in water. What is the total volume of all the cavities in the casting? The density of iron (that is, a sample with no cavities) is 7.87 g/cm3. Number i Units

What kind of error does this pose and why? "A volumetric cylinder that is used to measure the volume of the liquid has a bump on the cylinder." a. Random error b. Minimal error c. Instrumental error d. Systematic error

Q 2: a- If you had 0.2 kg of helium, how many helium atoms would you have? b- If you had 10 dozen helium atoms, what would be their mass? c- What is the mass of one helium atom? d- What is the mass of 2.0 moles of helium atoms?

9. 10 The equation of the graph above is A P-10Q +5 B C P=-2Q+10 D P - 2Q + 10 P 5Q-10

I need the answer as soon as possible