o The base of an insect's leg is approximately spherical in shape ,with a radius of about 2x10- m. The 0.003 g mass of the insect is supported equally by the six legs .calculate the angle 0 for an insect on the surface of water .Assume the water temperature is 20°C ?
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- 7 of 13 At an altitude of 11,000 m (a typical cruising altitude for a jet airliner), the air temperature is -59.0° C and the air density is 0.467 kg/m³. The molar mass of air is 28.8 g/mol. Part A What is the pressure of the atmosphere at that altitude? (Note: The temperature at this altitude is not the same as at the surface of the earth, so the equation Р— Ро ехp (- Mgy doesn't apply.) RT Express your answer with the appropriate units. HA ? Value Units Submit Request AnswerIf 1.2 mol of oxygen gas is confined in a 10-L bottle under a pressure of 3.0 atm , what is the average translational kinetic energy of an oxygen molecule? Express your answer using two significant figures. Hν ΑΣφ к- J Submit Request Answera A Geiger-Mueller tube is a radiation detector that consists of a closed, hollow, metal cylinder (the cathode) of inner radius r and a coaxial cylindrical wire (the anode) of radius rb (see figure below) with a gas filling the space between the electrodes. Assume that the internal diameter of a Geiger-Mueller tube is 3.05 cm and that the wire along the axis has a diameter of 0.195 mm. The dielectric strength of the gas between the central wire and the cylinder is 1.15 x 106 V/m. Use the equation 2πrle in to calculate the maximum potential difference that can be applied between the wire and EO the cylinder before breakdown occurs in the gas. Cathode Anode =
- In this problem you will consider the effect that thermal expansion due to temperature will have on Archimedes' principle. Take the densities of water and copper at 0ºC to be 1.00 × 103 kg/m3 and 8.90 × 103 kg/m3, respectively. a. Calculate the fraction of a copper block’s weight that is supported by the buoyant force at 0°C. b. Calculate the fraction of a copper block’s weight that is supported by the buoyant force at 95°C. Assume the volume expansion coefficient of copper is βC = 5.10 × 10-5 1/°C.Suppose that the rms speed of carbon dioxide molecules, with molar mass of 44.0 g/mol, in a flame is found to be 1.2 × 105 m/s a.What temperature, in kelvins, does this represent? b. What temperature, in celsius does this represent?Five gas molecules have speeds of 500, 600, 700, 800, and 900 m/s. What is the rms speed? What is the average speed?