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A certain spring which obeys Hooke's law, stretches a spring 4 meters when a force of 20 Newton's is applied. How far will a 60 newton force stretch the spring?
a screen is placed 1m from a single slit which is illuminated with 690 nm light. the slit width is 0.1 mm. what is the
Three small spheres, each have a charge of 3.60 %u03BCC, are arranged in a line, with sphere 2 in the middle. Adjacent spheres are initially 8.70 cm apart. What is the speed of each sphere when they are far apart
The brakes of a truck cause it to slow down by applying a retarding force of 7350 N to the truck over a distance of 1090 m. What is the work done by this force on the truck
If a net acceleration of magnitude 5.00m/s2 is applied to a cart such that after 25 seconds it has a displacement of 75m, What was its initial velocity
The speed of a bobsled is increasing because it has an accelerationof 2.4m/s^2. At a given instant in time, the forces resistingthe motion, including kinetic friction and air resistance, total450 N.
A leaf of area 36cm2 and mass 4.8×10?4kg directly faces the Sun on a clear day. The leaf has an emissivity of 0.85 and a specific heat of 0.80 kcal/kg?K. Estimate the rate of rise of the leaf's temperature
Two friends are carrying a crate of mass 200 kg up a flight of stairs. The crate has length 1.25 m and height 0.500 m, What is the magnitude of the upper person's force
In determining the specific heat of a new metal alloy, 150g ofthe substance is heated to 400C and then placed in a 200g aluminiumcalorimeter containing 400g of water at 10C. If the finaltemperature of the mixture is 30.5C, what is the specific hea..
Two long parallel wires each with a mass per unit length of 25.10 g/m are supported in a horizontal plane by 2.5 cm long strings. Each wire carries the same current, I, causing the wires to repel each other so that the angle between supporting string..
Estimate the force P to accelerate the 80 - Ib block at 6ft/sec2 to the right.
For a uniform spherical distribution of mass with volume density ? and radius R, find the magnitude of the gravitational field at a distance d from the center of the mass distribution (d > R). Possibly useful: div g = -4?G?.
A 0.080 T magnetic field is perpendicular to a circular loop of wire with 100 turns and radius 30cm. what is the magnitude of the induced emf
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