If you have two bottles full of lake water and keep one in the dark and the other in daylight, which one would have a higher DO after a few days? Why?
Q: How much energy is required to heat 7.5 kg of ice from -30 oC to steam at 200 oC?
A: Write the given values with the suitable variables. m=7.5 kgT1=-30 °CT2=200 °C Here, m is the mass,…
Q: What is the difference between spectral emission and absorption lines? And what is their origin? 2.…
A:
Q: 2. Calculate the melting point of ice under a pressure of 10 MPa in Kelv density of ice under these…
A: GivenP=10 MPa
Q: 1- How do molecular mechanics methods calculate the potential energies of molecules?
A: SOlution:
Q: 61. Which of the following would be classified as an innovation? a. Edwin H. Land perfects the…
A:
Q: also say between two latitudes you must add the values together if they are in opposite hemispheres…
A: According to question Additional if they are in opposite hemisphere
Q: DEA agents watch drug smugglers load 10,000 N of cocaine onto a fishing boat to transport it from…
A: weight = 10000 N density of saltwater = 1025 kg/m3area of base of boat = 50m2
Q: Suppose 1.0 cubic meter of oil is spilled into the ocean. Find the area of the resulting slick,…
A:
Q: According to the Young-Helmholtz theory of color vision, humans have cell receptors called "cones"…
A: The colour of an object can be seen when it reflects off the surface and reach to our eye
Q: 36. Which of the following is true about energy from the sun? a. It arrives as mechanical energy in…
A:
Q: 2. What is the temperature of an 11.2-L sample of carbon monoxide, CO at 744 torr if it occupies…
A:
Q: Physics is considered to be the study of everyday phenomena; how important do you think is Physics…
A: Physics is branch of science which deals with things like force matter energy and motion . We use…
Q: Based on your observation, what is the direction of the circulation of red food color? blue food…
A: As the heart beats, it pumps blood through a system of blood vessels called circulatory system.…
Q: 4) Some fish that evolved to live at extreme depths essentially explode if they are Prirted by Wotam…
A:
Q: 3. Which of the following elements is a liquid at room temperature? а. N С. Br b. В d. Si O A O B O…
A:
Q: 4)A sample of a gas has a volumey of 4.5 liters at a pressure of 770mm Hg. What will be the volume…
A: Given data: Initial volume (V1) = 4.5 L Initial pressure (P1) = 770 mm of Hg Final pressure (P2) =…
Q: 2. It is recommended that athletes drink a minimum of 0.24 L of water for every 20.0minutes of…
A: Given: 0.24 L of water needed for every 20 minute. Amount of water in bottle =1500.0 mL Athlete work…
Q: The number density of air in a child's balloon is roughly the same as sea level air, 1019…
A: Number of particles in the balloon is, N=nVN=n×43πR3
Q: Victor loves the movie "Titanic". After he gets his Moderna booster, he takes a Disney Cruise to…
A: GIVEN: Density of water =ρw=1010 kg/m3 Density of ice =ρice=917 kg/m3 length of ice cube = a=2m
Q: 1. Which of the following are examples of how the sclence of physics is used to advance technology?…
A: Here in this question all options are correct.
Q: 1. Tony wants ivy to grow on his white picket fence in a certain direction. He decides to run a…
A: Section of wire in front of the house (l) = 10 feet Height (h) = 27 inches Using the conversation, 1…
Q: 26. A piece of solid weighs 120 g in air, 80 g in water and 60 g in a liquid. The relative density…
A:
Q: What is a mole? What is energy?
A: We have to define the following. -What is a mole? -What is energy?
Q: A typical atom has a diameter of about 1.0×10^−10m. Approximately how many atoms are there along a…
A: GivenDiameter of atom D=1.0×10-10mLength of line L=5.0cmL=5×10-2m
Q: Air, CO2, some plastics, water, and hand sanitizer are all transparent materials. Yet you can tell…
A: any object when interacts with light the following four phenomena can occur: 1.Specular Reflection:…
Q: 57 Petermina the vol tage drop acvoss 4-dhm vesistor in the figure belaw. 4 r 10 . 心 20V =
A: Since you have asked multiple question, we will solve the first question for you. If you want any…
Q: A water molecule is shown schematically in the figure (Figure 1). The distance from the center of…
A: The distance from the center of the oxygen atom to the center of a hydrogen atom is 0.96 Å The angle…
Q: 2. Can a 1kg mass balance 1000kg a mass? How?
A: Yes we can balance a 1000 kg mass by a 1kg mass by using torque balance method. How we can balance…
Q: Liquid nitrogen is obtained froM liquefied air and is used to prepare frozen goods and in…
A: Given : density of liquid nitrogen at boiling point (d) = 0.808 gcm3Required : density of liquid…
Q: Suppose it is winter and the system is filled with methanol. The density of methanol is 0.80 g/cm3.…
A: Note: Volume of methanol is not given. Supposing it to be a known problem, volume of methanol is 20…
Q: Problem 1: Answer the following questions using the table to the right. Medium Gases at 0 °C, 1 atm…
A:
Q: How does opening one’s mouth, swallowing or chewing help reduce the popping of the ear as we travel…
A: Atmospheric pressure: The envelope of air around the earth is called the atmosphere. The weight of…
Q: 1. It is debated that a certain civilization knew how to forge metals. To determine the density of a…
A: Archimedes' principle states that when an object is partially or fully immersed in a fluid, it…
Q: 1. The unit angstrom , symbolized by Å , is named after Anders J. Angstrom. Given that 1Å = 0.1nm,…
A:
Q: 2. In a crystalline material, what do we mean by "unit cell"? Why is it useful of unit cells instead…
A: unit cell is smallest unit of any crystal which repeat in symmetry to form full crystal.
Q: Two liquids, A and B, have densities of 0.75 grams per milliliter and 1.14 grams per milliliter,…
A: The density of a substance is based on its mass, size of atoms and their arrangements
Q: At the park there is a pool shaped like a circle. A ring-shaped path goes around the pool. Its inner…
A: The radius of the outer circle( R) = 14 yd The radius of the inner circle(r) = 10 yd the…
Q: How many atoms are in a 4.10 cm × 4.10 cm × 4.10 cm cube of aluminum?
A:
Q: Integrated Concepts - The boiling point of water increases with depth because pressure increases…
A: The vapour pressure at 150C, Pabs=4.76×105 Pa The atmospheric pressure, Patm=1.013×105 Pa The…
Q: We take a sample of atoms in the fundamental level. We excite the atoms until they're all in the…
A: Emission spectrum:
Q: 1. When the sun is directly overhead, the thermal energy incident upon the earth is about 1.4 × 106…
A:
Q: Draw a Miller plane which was indexed as (110) in a face centred cubic structure and state how many…
A: The miller indices of the plane is given as (hkl)=(110) The intercepts of this plane on x, y and z…
Q: The Moon is approximately 400,000 km from the Earth. An atom of a certain element has a diameter of…
A:
Q: If you add salt continuously to a glass of water, eventually some salt will remain at the bottom.…
A: Given Assertion: If we add salt continuously to a glass of water, eventually some salt will remain…
Q: What does it mean to state that something is on the periphery of something else?
A: the external boundary of any surface or area. the external surface of a body. the edge or outskirts,…
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- Approximately how many atoms thick is a cell membrane, assuming all atoms there average about twice the size of a hydrogen atom?1. Suppose the amount of air in a person's lungs is 2.2 L, Calculate the number of moles of air molecules in the person’s lungs when the pressure there is atmospheric pressure. Note that the air is at 37.0°C (body temperature). 2. An expensive vacuum system can achieve a pressure as low as 1.05 × 10-7 Pa at 20°C, How many atoms are there in a cubic centimeter at this pressure and temperature?7. Calculate the mass of nitrogen present in a volume of 3000 cm' if the gas is at 22.0 °C and the absolute pressure of 2.03 ×10* Pa is a partial vacuum easily obtained in laboratories. (a) 6.95 ×10 kg; (b) 6.95 ×10* kg; (c) 6.95 ×1012 kg; (d) 6.95 ×10-16 kg. 8. Materials in which the electrons are bound very tightly to the nuclei and do not move freely are referred to as (a) Insulators; (b) Conductors; (c) Semiconductors .
- 1. An expensive vacuum system can achieve a pressure as low as 1 x 10-7N/m² at 20 °C. How many atoms are there in a cubic centimeter at this pressure and temperature? The Boltzman's constant k= 1.38 x 10 m²kg/(s²K) -23 Number of atoms:2. Why is the following situation impossible? A team of researchers discovers a new gas, which has a value of y = of 1.75.10:55 > t.myexams.unisa.ac.za MENU E Frag question A. 5.0 x 108 ft³ B. 6.0 x 108 ft³ C. 8.6 x 108 ft³ D. 2.1 x 108 ft³ E. 4.8 x 108 ft³ ||| Vol) 4G LTE2 T The largest building in the world by volume is the Boeing 747 plant in Everett, Washington. It measures approximately 650 m long, 710 yards wide, and 110 ft high. What is its volume in cubic feet? O 47 71% < myExams
- 5. Iron has molar mass 55.8 g/mol. (a) Find the volume of 1 mol of iron. (b) Use the value found in (a) to de- termine the volume of one iron atom. (c) Calculate the cube root of the atomic volume, to have an esti- mate for the distance between atoms in the solid. (d) Repeat the calculations for uranium, finding its molar mass in the periodic table of the elements in Appendix C.2. Consider two equal volumes of gas at a given temperature and pressure. One gas, oxygen, has a molecular mass of 32. The other gas, nitrogen, has a molecular mass of 28. What is the ratio of the number of oxygen molecules to the number of nitrogen molecules? A) 32.28 B) 28.32 C) 11 D) none of the above Answer Explanation 2021/12/11 08:262.) The escape velocity of any object from Earth is 11.1 km/s. At what temperature would oxygen molecules (with a molar mass M = 32.0 g/mol) have root-mean-square velocity vrms equal to Earth's escape velocity of 11.1 km Hint: Pay attention to dimensions/units and recall 1 kg-m? the Sl units for energy are the Joule (J), where 1J = s2
- 22. An ideal gas is trapped in a stationary container with the help of a piston and there is a small hole in the container through which the gas leaks If by heating the gas and simultaneously pushing the piston into container, temperature and pressure of the gas is increased to 4 times and 8 times respectively of their initial values, how many times does the rate of leakage of the gas (i.e. number of molecules leaking per second) change?1. Average atomic and molecular speeds (vrms) are large, even at low temperatures. What is vrms (in m/s) for helium atoms at 6.00 K, just two degrees above helium's liquefaction temperature? 2. The escape velocity from the Moon is much smaller than from Earth and is only 2.38 km/s. At what temperature (in K) would hydrogen molecules (molar mass is equal to 2.016 g/mol) have an average velocity vrms equal to the Moon's escape velocity? 3.Hydrogen molecules (molar mass is equal to 2.016 g/mol) have an average velocity vrms equal to 239 m/s. What is the temperature (in K)?5. A storage tank contains mass M of oxygen (O₂) at an absolute pressure of P and temperature T. Another tank of the same volume contains the same mass of CO₂ at the same pressure. What is the temperature in the CO₂ tank? (The combined numbers of protons and neutrons in atoms of C and O are 12 and 16, respectively. Do not use moles!).