Physics question and answers for August 21, 2023
- Q A bumper car with mass m1 = 115 kg is moving to theright with a velocity of v1 = 4.8 m/s. A second bumpercar with mass m2 = 95 kg...
- Q The figure shows two parallel nonconducting rings with theircentral axes along a common line. Ring 1 has uniform chargeq1 and radius R; ring 2 has uniformcharge q2 and the same...
- Q Bycicles convert force into torque (pedal to axis), torque intoforce (axis to chain using the front gear), force into a torque(chain to back wheel using back gear), and finally, torque...
- Q The Navajo Generating Station was a 2250 MW plant when operatingat full power.a) Assuming the plant operates at 38% efficiency and that coalhas a heat content of10,500 BTU/lb, calculate how...
- Q An airplane traveling at half the speed of sound emits a soundof frequency 5.29 kHz.(a) At what frequency does a stationary listener hear the soundas the plane approaches? kHz(b) At...
- Q a hot reservoir at 576k transfers 2100 j of heat irreversibly toa cold reservoir at 350 k. Find change in entropy of theuniverse.
- Q A small conducting spherical shell with inner radiusa and outer radius b isconcentric with a larger conducting spherical shell with innerradius c and outer radius d. Theinner shell has a...
- Q Determine the number of combined states, in the form of total |sm s >, for the combination of four spin ½ particles.Do NOT determine the coefficients in the composite states.Hint:...
- Q A 679-kg elevator starts from rest and moves upward for 3.30 swith constant acceleration until it reaches its cruising speed,1.63 m/s. (a) What is the average power of the elevator...
- Q An unpolarized beam of light is incident on a pair of polarizingfilters. The first filter set to polarize in the vertical directionand the second filter is set to polarize 38°...
- Q (a) Name 4 major components of a Gamma camera. Briefly explainthe function of each component.Also, describe the advantages and disadvantages of using “thinâ€scintillating crystal.(b) In an experiment with 51.80 MBq...
- Q Smarty McGuy intends to charge the parallel plate capacitorinside his intergalactic Ford Pinto (built by Doc Dre) with alightning strike of 26x103 amps. Doc Dre's capacitorspecifications are listed below:The distance...
- Q Explain two reasons behind the commercial failure of Low EarthOrbit satellite mobile communications companies (such asIridium).
- Q An object with total mass mtotal = 14.8 kg is sittingat rest when it explodes into three pieces. One piece with massm1 = 4.8 kg moves up and to the...
- Q The following hypothetical reaction shows a neutron (n) decaying into a proton (p+), an electron (e?), and an uncharged particle called an antineutrino:At first there is no charge, but then...
- Q A charged insulator and an uncharged metal object near each other (a) Exert no electric force on each other.(b) Repel each other electrically.(c) Attract each other electrically.(d) Attract or repel, depending...
- Q The electric field at a point in space is a measure of(a) The total charge on an object at that point.(b) The electric force on any charged object at that...
- Q Two charged particles attract each other with a force of magnitude F acting on each. If the charge of one is doubled and the distance separating the particles is also...
- Q A gas of nitrogen molecules is at a temperature of 1000K. Inthis case molecule has 3 translational, 2 rotational, and 2vibrational degrees of freedom per molecule, i.e. a total of...
- Q In the figure, which best represents the field lines due to two point charges with opposite charges?
- Q Which of these statements comparing electric and gravitational forces is correct?(a) The direction of the electric force exerted by one point particle on another is always the same as the...
- Q Two point charges q and 2q lie on the x-axis. Which region(s) on the x-axis include a point where the electric field due to the two point charges is zero?(a)...
- Q In each of six situations, a particle (mass m, charge q) is located at a point where the electric field has magnitude E. No other forces act on the particles....
- Q A rod is negatively charged by rubbing it with fur. It is brought near another rod of unknown composition and charge. There is a repulsive force on each. (a) Is the...
- Q Some forms of cancer can be treated using proton therapy in which proton beams are accelerated to high energies, then directed to collide into a tumor, killing the malignant cells....
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