The SARS-CoV-2 (COVID-19) virus can be described as approximately spherical having a diameter of about 120 nm. If the density is about the same as water, 1 000 kg/m", determine the mass of one COVID-19 virus. Express your answer in picograms. Clearly show your calculations and unit conversions using the chain method.

The followings are the measurements from one group of students: M1=127.01 g, M2=49.40 g, Xi=33.90 cm, Xf=87.90 cm, Δt = 1.38 sec, what should be their μk value?  Enter the result with correct significant figures.

A study fonds that the metabolic rate of mamals is proportional to the mass of the mamal carried to the exponent of (3/4). By what factor does the metabolic rate of a 70.0 kg human exceed that of a 6.30 kg cat?\ 70.0 3/4 kg    = 6.09 6.303/4 kg I set up the values as a ratio and came up with 6.09. OK, I answered my own question. That is the correct answer.

An Olympic-size swimming pool is 50 m long, 25 m wide, and 2 m deep. In terms of volume, this pool, when full, holds how many kilogallons of water? Use the following equivalences: 1 gallon = 3.8 L     1 kilogallon = 103 gallon      1 L = 103 mL     for water: 1 mL = 1 cm3      1 m = 100 cm   [Numerical Problem: Just write the numerical answer without units. Express your answer to 2 significant figures in standard notation]

A person's blood pressure is measured to be: 115 ± 7 mm Hg. What is its percent uncertainty? (Express your answer to the correct number of significant figures and proper units. Use unrounded values in your calculations.)

This was wrong. Can you solve this again with these numbers? What is the root mean square velocity, vrms, for Hydrogen molecules (H2) at 20oC? Hint: How many amu does an H2 molecule contain. 1 amu = 1.67 x 10-27 kg Boltzman's Constant, k = 1.38 x 10-23 J/K Give your answer in m/s to 4 significant figures (NO DECIMALS)

il vidong P 7. (10pt) In AABC, ZC = 81°, ZB = 33°, and side c = 15. Find side b of AABC to the nearest tenth. pucg 1701 8. (a) (5pt) Prove the identity: secx-cosx = secx sin²x Ils obulout jollood moitotumnez baicoibai saiwisdio aeslau mmol jalgraiz oszo ni flot bris bolodal (b) (5pt) Find cos, if sin and tan 0 <0 5 snowers odriguia bustolovioc (0.x) mpl ori) to anotulos) airpori y bris x sit state noitsupo ostboup grivollol smil movie (inc E+xxx dgety od dolose or noemolni zid sau no bas tev dr.((,0) bas 9. Find all exact solutions to the trig equations for x = [0, 27): tan(x) = -√3 2 sin(x) = √2 (a) (5pt) (b) (5pt) =-- 10. (a) (5pt) Evaluate the logarithm without using a calculator: log, (819) hoitoup oils bri (b) (5pt) Solve for x and round the answer to the nearest tenth: 12* = 384 110 auibet bos.odnos odi vinobl mol bisbraste 20180b7009 diw storio edino ziniog spot fods. I npitori xalqinos oli vulgrai? woled invig oloro od to noisups silloi odi gniau slonio odi dgers bi 01-…

b) In an equation (P+) (V - b) = RT, where P is the pressure, V is the volume, T is the temperature and a, b, R are constants. What is the dimensional formula of ?

You are measuring the length of a tube using a ruler. Your actual measurement of the tube is 6 mm ± 1 mm. Compare the accuracy and precision of your measurement compared to the expected measured value of 6.0 mm ± 0.1 mm Describe the accuracy of your measurement: Choose... Describe the precision of your measurement: (Hint: Look at the number of decimal places in the measurement.) v Choose... I don't know High Low Check

Complete the missing entries in the table of metric prefixes, symbols, and multiplication factors. Pay attention to capitalization in the Prefix Symbol column, and specify whether the prefix is upper or lower case in the right-most column. The rows are not in any particular order. Example 1. 2. 3. 4. 5. Multiplier 10-¹2 10-2 10-3 Prefix Name pico kilo mega Prefix Symbol Р G Upper or lower case prefix? lower upper