OC userin Physics·17 Oct 2019Suppose 80.3 J of heat is added to a 122 g piece of aluminum at21.0 degrees Celsius.What is the final temperature of the aluminum?
OC userin Physics·2 Nov 2019If the eye receives an average intensity greater than 100W/m^2 ,damage to the retina can occur. This quantity is called the damagethreshold of the retina.What is the largest average power (in ) that a laser beam 1.50 indiameter can have so that it can be considered safe to viewhead-on?What is the maximum value of the electric field for the beam inpart A?What is the maximum value of the magnetic field for the beam inpart A?How much energy would the beam in part A deliver per second to theretina?Express the damage threshold in W/cm^2
OC userin Physics·14 Nov 2019The temperature of 3.20 mol of an ideal monoatomic gas is raised 14.0 K in an adiabatic process. What is the work done by the gas?
OC userin Physics·27 Jan 2019A 2.0-cm-diameter, 15-cm-long solenoid is tightly wound from1.2-mm-diameter wire. Whatcurrent is needed to generate a 2.9 mT field inside the solenoid? _____ A
OC userin Physics·1 Jun 2019Each of the two adjacent 0.9 kg spheres hands from a ceiling by a string. The center-to-center distance of the sphere is 6.2 cm. What angle (small) does each string make with the vertical?
OC userin Physics·21 Apr 2020http://www.andyslife.org/misc/Classes/Statics/12th%20Edition/95630-HIBBELER_ISM_03.pdf from teh link above i am having trouble near the bottom , ican't seem to solve equation 1,2, and 3 to get tehre answer
OC userin Physics·27 Jan 2019An object oscillating with simple harmonic motion completes a cycle in a time T. If the object's amplitude is doubled, the time required for one cycle is still T, even though the object covers twice the distance. How can this be? Explain.
OC userin Physics·31 Aug 2019a)A diffraction grating with d = 2000 nm is used with a mercurydischarge tube. At what angle will the first-order blue-greenwavelength of mercury appear? What other orders can be seen, and atwhat angle will they appear?b)The diffraction grating of the previous question is used at adistance L = 50.0 cm from the slit. What is the distance D from theslit to the first-order image for the blue-green wavelength ofmercury? Show your work.
OC userin Physics·21 Jan 2019100 kg weapon10 kg round fired while at restspeed of round 90 m/swhat is recoil speed of weapon?4.5, 9, 45, or 0 m/s
OC userin Physics·28 May 20191500 kg crane moves upward with constant speed through avertical distance of25m. How much work is done by the tension ofthe crane cable? 990, 8100, 140K, 370K, 430K ? unit in J
OC userin Physics·28 Jan 2019alt. 1.00 x 1.06m above the eartradius of earth = 6.38 x 106mWhat is the acceleration due to gravity?3.99, 9.8, .5, 6.77, 7.32 m/s^2
OC userin Physics·11 Jul 2019trell pushes a kite with a force of 45N directed at 41 degreesbelow the horizontal direction. Calculate the work trell does onthe move each time he pushes it 9.1m across the beach.510, 260, 410, 360, 310
OC userin Physics·24 May 2019.50kg hockey puck slides across ice at a velocity of 2 m/s to the west. The puck gets hit and breaks in 2 pieces, .20kg moves south at 4 m/s and the other .3okg piece? What are the components of the velocity for the other piece?
OC userin Physics·4 May 2019car enters a curved racetrackof radius 50m. The coefficient static friction between tires and road is .2. What is the max. speed the racecar can safely negotiate the curve? (unbanked)
OC userin Physics·10 Feb 2019towtruck = max lift = 25k Nhoists a 2000kg car by applying max force for 2 seconds intervalthen normal force to keep the car moving upward at a constantspeed. How long does it take to lift the car 30m?