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What is the temperature of a metallic block in a thermal equilibrium with a mixture of ice and water at 1 atm pressure? A)0C B)273k. C)0K. D)100C
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A transformer has a primary coil with 300 turns and a secondary coil with 600 turns. If the output voltage is 75 volts, what is the input voltage?
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See attachment there are 2 pipes viewed from the side, pipes A and B. Their masses are 80lb and 60lb. how much force must be applied to pipe B to make the pipes not move. assume that the pipes can mov
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The law of reflection states that if the angle of incidence is 76 degrees, the angle of reflection is ___ degrees.
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Over the course of a year areas near Earth's equator receive more direct energy from the Sun than areas near Earth pole which of the following correctly describes one result of this heating pattern
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A doctor uses an instrument that emits light and allows the doctor to view the inside of a patients intestine. What is the doctor most likely using?
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When Emma pushes a bag with a force of 27 newtons, the coefficient of kinetic friction between the bag and the floor is 0.23. What is the normal force acting on the bag by the floor? 0.085 newtons 27
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Find the value of T1 if 1 = 30°, 2 = 60°, and the weight of the object is 139.3 newtons. 69.58 newtons 45.05 newtons 25 newtons 98.26 newtons
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Two bodies A and B placed on a scale pan supported by a light inextensible string are placed on each other, in such a way that body A is placed on body B , the weight of bodies B and A are ,4N and 2N
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When the Wave moved through your line of students, What Actually moved? In What direction? (Be Sure to explain in full sentences.)
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Two football players collide on the field. Before the collision, their total momentum was 450 kgm/s to the north. What is their total momentum after the collision? A. More than 450 kgm/s north B. 450
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In a given chemical reaction, the energy of the products isn’t greater than the energy of the reactants. Which statement is true for this reaction?
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Sandra is working hard to gain some strength for spring track. She has not done much this winter, so she has decided she will do bench presses and curls on Monday, stomach and back exercises on Wednes
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What is the name for a small depression created by the melting of a chunk of ice in glacial ˢᴱᴰᴹᴵᴺᵀ
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You are designing eyeglasses for someone whose near point is 60 cm. what focal length lens should you prescribe so that an object can be clearly seen when placed at 25 cm in front of the eye
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In the parallel rlc circuit at right, let r = 8 k, l = 0.2 mh, and c = 8 µf. (a) calculate ω 0 , q, and the bandwidth b. (b) find ω 1 and ω 2 .
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The data sheet for the transistor reports that v b e , o n = 0.7 v vbe,on=0.7 v and β = 110 β=110. your lab partner, freddie, biases the transistor such that v c c = 16 v vcc=16 v, r c = 800 ω rc=8
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Based on the thermodynamic properties provided for water, determine the energy change when the temperature of 0.250 kg of water decreased from 109 °c to 30.5 °c.
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A rod consisting of two cylindrical portions ab and bc is restrained at both ends. portion ab is made of steel (es 5 29 3 106 psi, as 5 6.5 3 1026 /8f) and portion bc is made of aluminum (ea 5 10.4 3
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A 1 510-kg automobile has a wheel base (the distance between the axles) of 3.10 m. the automobile's center of mass is on the centerline at a point 1.30 m behind the front axle. find the force exerted
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A box is pulled by a string with horizontal force t across a horizontal, frictionless table. if the box starts from rest, what is the relationship between the speed v1 after the box has moved a distan
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What is the force between two small charged spheres that have charges of 2 x 10–7 C and 3 x 10–7 C and are placed 30 cm apart in air?
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Hiro rubs an inflated balloon on his hair, and his hair sticks to the balloon. As he moves the balloon away from his head, how does the electric force change? The electric force increases because the
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If the mass of a material is 44 grams and the volume of the material is 15 cm^3, what would the density of the material be?
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You are traveling on a hilly road. at a particular spot, when your car is perfectly horizontal, the road follows a circular arc of some unknown radius. your speedometer reads 90.0 km/h, and your appar
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While traveling on a dirt road, the bottom of a car hits a sharp rock and a small hole develops at the bottom of its gas tank. if the height of the gasoline in the tank is 28 cm, determine the initial
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When landing after a spectacular somersault, a 40.0-kg gymnast decelerates by pushing straight down on the mat. calculate the force she must exert if her deceleration is 7.00 times the acceleration du
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We have discussed the motion of electrons in a conductor and the conditions under which ohms law arises in a resistor. but there are other situations in which potential differences lead to current flo
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University physics 6.81: calculate the friction. consider the system shown below. the rope and pulley have negligible mass, and the pulley is frictionless. initially the 6.00 kg block is moving downwa
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Two fully annealed cylindrical specimens of an alloy are to be hardened by reducing their (always circular) cross-sections in an extrusion process. for one specimen, the initial and post-deformation r
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The sketches below show a circular coil and a permanent magnet; the arrows indicate both the magnitude and the direction of the velocities of the magnet and coil. in which situations will the induced
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The large blade of a helicopter is rotating in a horizontal circle. the length of the blade is 5.8 m, measured from its tip to the center of the circle. find the ratio of the centripetal acceleration
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The full-wave converter used as an inverter in fig. 4-14 has an ac source of 240 v rms at 60 hz, r 10 , l 0.8 h, and vdc 100 v. the delay angle for the converter is 105. determine the power supplied t
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The drawing shows a golf ball passing through a windmill at a miniature golf course. the windmill has 12 blades and rotates at an angular speed of 1.75 rad/s. the opening between successive blades is
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The bar ab is supported by two smooth collars. at a the bar is rigidly attached to the collar, and at b the collar is connected to the bar by a ball-and-socket joint. if a 100 lb load is applied to th
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Refrigerant 134a enters a condenser operating at steady state at 60 ibf/in.2and 140°f and is condensed to saturated liquid at 60 lbf/in.2on the outside of tubes through which cooling water flows. in
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In pulse amplitude modulation encoding, the general rule is that we need to sample at twice the bandwidth. in addition, if we use n bits for each sample, we can represent 2n loudness (amplitude) level
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Imagine that the container from the problem introduction is now filled with n identical gas particles of mass m. the particles each have different x velocities, but their average x velocity squared, d
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Find the magnitude of the net torque τ acting on the system. be sure to use the absolute value function in your answer, since no comparison of m1, m2, and mbar has been given. express your answer in
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Find the magnitude of the magnetic flux through the floor of a house that measures 21 m by 18 m . assume that the earth's magnetic field at the location of the house has a horizontal component of 2.8
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Copy the order form from lab exercise 2, part 3 to l4p3.html. (you can use the unix command cp l2p3.html l4p3.html to do this or copy it locally and upload the copy with your sftp tool.) make a link t
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Case omicron: augustino stands on the scale which is placed on a shallow ramp which has a very low incline angle. case upsilon: augustino stands on the scale which is placed on a level floor. case iot
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A solid hemisphere of radius b has its flat surface glued to a horizontal table. a second solid hemisphere of different radius a rests on top of the first one so that the curved surfaces are in contac
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A particle with a charge of 7.80 nc is in a uniform electric field directed to the left. another force, in addition to the electric force, acts on the particle so that when it is released from rest, i
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An astronaut has a mass of 70 kg. what is the weight of the astronaut on earth at sea level? what are the mass and the weight of the astronaut on the moon, and on mars? what is the ratio of the pressu
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A 4.00-m-long, 460 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. a 73.0 kg construction worker stands at the far end
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A lens of focal length 40 mm is mounted on a 35 mm camera. the lens aperture is set at f/5.6 and the shutter speed set at 1/250 s. a different camera has a lens of focal length 56 mm in place. the shu
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A is 300 kpa, the volume flow rate of water at 10°c delivered to the tank is 0.0035 m3/s. if we want to reduce the flow rate in half, what should the valve opening (s/d) be? the pressure at a still r
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9. WHERE SHOULD YOU START MAKING A U-TURN WHEN DRIVING ON A DIVIDED STREET WITH MULTIPLE LANES IN YOUR DIRECTION? A. On the shoulder B. In the left lane C. In the median
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A certain pendulum consists of a 1.5-kg mass swinging at the end of a string (length = 2.0 m). at the lowest point in the swing the tension in the string is equal to 20 n. to what maximum height above
