Physics question and answers for September 30, 2023
- Q Inflation(a) What is the cosmic epoch of inflation in the early universe?How is this different from the usual expansion of the universe?(b) What similarities and differences are there betweeninflation and...
- Q Inflation(a) Why is it puzzling that the observed CMB temperature isalmost exactly the same on opposite sides of the sky? How wouldthis result be explained in cosmology theories that do...
- Q Please use any of the methods to prove whether each ofthe following arguments is valid or invalid. For each problem,please identify the method that you have decided to employ and...
- Q Please include detailed work for answers.A window air conditioner uses 1272 W of electricity and has acoefficient of performance of 3.64. For simplicity, let's assumethat all of that electrical energy...
- Q A capacitor C1 =1F is connected to a 1V battery using a wirewith a total resistance R = 1OhmSuppose after the charging is complete the capacitor C1 isconnected to another...
- Q In a lava lamp, a waxy fluid (say Ï= 1225[kg/m3]) is surroundedby another fluid(say Ï= 1200[kg/m3]), they are mutually insoluble, and they areheated by a lamp in thebottom of the...
- Q 1. Special Relativity (a) An observer sees a πon moving pastwith momentum ~p. In the rest frame of the πon, it decays into aµon and a νtrino in perpendicular directions...
- Q A “U†shaped tube (with a constant radius) is filled with waterand oil as shown. The water is a height h1 = 0.36 mabove the bottom of the tube on...
- Q A block with mass m =6.7 kg is hung from a vertical spring. Whenthe mass hangs in equilibrium, the spring stretches x = 0.29 m.While at this equilibrium position, the...
- Q Make a table or list of the major similarities & differencesbetween the Moon & Mercury, including three major discoveriesabout Mercury made by Mariner 10 & three improved results foundby MESSENGER....
- Q A roller-coaster track is being designed so that theroller-coaster car can safely make it around the circular verticalloop of radius R = 24.5 m on the frictionless track. The loop...
- Q In each hand you hold a 0.17-kg apple. What is the gravitationalforce exerted by each apple on the other when their separation iseach of the following?(a) 0.40 m_______ N(b) 0.80...
- Q a signal is carried by a coaxial cable. The signal is carried byan inner wire with radius R1 while an outer conductor of radius R2is grounded. An insulating materiel is...
- Q An old piece of wood has a carbon mass of 124 g and an activityof 13 Bq. How old is the song? The radioactive isotope of naturalcarbon has f =...
- Q Four point masses each with a mass of 4.90 kg are positioned atthe corners of a rectangle with dimensions 1.80 meters by 3.00meters. Assume these are the only masses that...
- Q A) A henry inductor, a 9 ohm resistor, a .05=1/20 faradcapacitor are placed in series and attached to a 9 volt battery tocomplete the circuit. Find the function for the...
- Q keplers third law states that the square of the period of anyplanets orbit is proportional to the cube of the semimajor axis ofthe orbit. for the following, show all your...
- Q What is the wavelength of the matter wave associated with aproton moving at 381 m/s?wavelength of proton matter wave: 1.04×10^9 mWhat is the wavelength of the matter wave associated with...
- Q A squirrel sitting on a peak of a roof which is 1.50 m above thebottom of the roof and 4.50 m above the ground puts an acorn on theroof. It...
- Q A particular human hair has a Young's modulus of 3.77×109N/m2and a diameter of 146 μm.If a 256 g object is suspended by the single strand of hair thatis originally 15.5...
- Q What is the quark designation of a neutron?a.uud.b.ddd.c.uuu.d.udd.e.ucb.What happens to nuclei that have too many neutrons?a.Extra neutrons β+-decay and turn into protons.b.Extra neutrons α-decay and leave the nucleus.c.Extra neutrons β−-decay...
- Q 377 g of water at 81°C & 279 g of glycerin at 47°Care poured into a 427 g copper cup at 58°C. Assuming these threemake up a closed (or isolated)...
- Q 1) a car of mass 999 kg traveling at 72.0 km/hour enters aflat(non-banked) and dry curve of radius 97.4 m. What is thecoefficient of static friction between the tires and...
- Q Before Fuel Injection. Some automobile engines (mainlyolder ones) use a carburetor to turn the liquid fuel into vapor andmix it with air for combustion. The basic principle of carburetionis shown...
- Q How does weight (in terms of w=mg) affect a wide and narrow grippull ups? does velocity, acceleration, displacement have somethingto do with it?
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