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An 845-N sled is pulled a distance of 173 m. The task requires 1.20 104 J of work and is done by pulling on a rope with a force of 142 N. At what angle is the rope held?
Find the flux of the Earth's magnetic field of magnitude 5.00 10-5 T, through a square loop of area 30.0 cm2 for the following when the field is perpendicular to the plane of the loop
A proton is initially at rest at a point where the potential is 499 V. Some time later the proton is at a point where the potential is 211 V. If no force other than the electrostatic force acts on
An empty slet of mass 25kg slides down a muddy hill with a constant of 2.4m/s. The slope of the hill is inclined at an angle of 15 degrees with the horizontal.
If we were able to use 0.85 percent of this energy to accelerate spaceships, then how many missions would be possible in one year?
You have a spool of 0.3 mm diameter wire and a 3.2 cm diameter plastic cylinder. How long must your inductor be if you wrap it with 2 layers of closely spaced turns?
A student who weighs 510 N is wearing a backpack that weighs 70 N. The student is standing still on level ground. Give your answers to the following questions in Newtons. (a) What is the magnitude o
Determine at what potential difference the dielectric of a 200 nF mica ( k=5.4) capacitor with a plate area of 0.625 m2 will break down. Dielectric break down of mica is 40kV/mm
A certain "black box" contains unknown resistances and sources of emfs connected in an unknown way such that (1) a 10 ! resistor across the terminals draws 1.0 A, and (2) an 18 ! resistor draws 0.6
At time t = 0, a projectile is launched from ground level. At t = 2.00 s, it is displaced d = 41 m horizontally and h = 67 m vertically above the launch point. At the instant it reaches its maximum
What is the magnitude of the velocity at which the two players move after the collision. What is the direction of this velocity?
A box is sliding up an incline that makes an angle of 34.8 ° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.182. The ini
Estimate how many photons per second of visible light will strike the pupil (4.0 diameter) of the eye of an observer 3.0 away.
Assume 18 g of a substance marketed as "Pure Energy" is annihilated by 18 g of a second substance "Anti-Pure Energy." How long would the energy released power a city which uses 1.7 × 109 W of
What is the (a) maximum and (b) minimum resistance that the variable resistor needs to provide in order for the "toasting" to last between 30 and 90 seconds?
A 51.0 kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.800 and 0.410, respectively.
The second force is an inverse square law, with magnitude A/x2 and direction away from the origin. Calculate the frequency of small oscillations around the equilibrium. [Data: M = 0.37 kg; B = 18 N;
During this process, 6 J of energy is expended by the external mechanism that expanded the gas. Which of the following statements is correct?
A long line carrying a uniform linear charge density +50:0C=m runs parallel to and 10:0cm from the surface of a large, at plastic sheet that has a uniform surface charge density of 100C=m2 on
A 3.55-kg object is thrown vertically upward from the surface of Mercury, where the acceleration due to gravity is g1 = 3.70 m/s2. The initial velocity is v1, and the object reaches a maximum heigh
A snowmobile climbs a hill at velocity v-up. The slope of the hill is a 1 ft rise for every 40 ft of distance. The resistive force of the snow is equal to 4.1 percent of the weight of the snowmobile
Three uniform thin rods, each of length L = 22 cm, form an inverted U. The vertical rods each have mass of 14 g; the horizontal rod has mass of 48 g. Where is the center of mass of the assembly (x,
The frequency of an opera singer is 450 Hz. Assume the speed of sound in air is 340 m/s. What is the frequency heard by an observer who is running down the road towards the opera singer with a spee
After the RCS thruster is turned off, find (a) the magnitude and (b) the direction of the vehicle's velocity relative to the space station. Express the direction as an angle (in degrees) measured f