Standing on a scaffold supported by a vertical rope
A window washer is standing on a scaffold supported by a vertical rope at each end. The scaffold weighs 200 N and is 3.20 m long. What is the tension in each rope when the 690 N worker stands 2.20 m from one end?
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The heat transferred from the gas during compression flows to heat reservoir at 25?. Calculate the entropy change of the gas, the entropy change of the reservoir and S_total
At time t=0, the suspended block is 0.80 m over the floor, and the blocks are released from rest. After 1.5 secs, the suspended block reaches the floor. What is the coefficient of kinetic friction between the table and the sliding block?
Apparent Weight, A 550-N physics student stands on a bathroom scale in an 850-kg (including the student) elevator that is supported by a cable. As the elevator stands moving, the scale reads 450 N. (a) Find the acceleration of the elevator (magnit
Two Lens that are L=29 cm apart are used to form an image. Lens 1 is converging and has a focal length f1=12 cm; Lens 2 is diverging and has a focal length f2=-7.0 cm. a) Determine the distance from lens 1 to the final image.
Consider the process of accelerating a car from 0 to 60 miles per hour in 10 seconds versus 30 seconds. Do both use the same amount of gasoline?
To do this, the cowboy sets a timer on his craft that will start as he passes the buoy. He plans to cruise by the buoy at 0.471 c .How much time should he allow between passing the buoy and ejecting?
A hospital patient has been given 131I (half life= 8.04 days) which decays at 4.5 times the acceptable level for exposure to the general public. How long must the patient wait to reach the acceptable level? Assume that the material merely decays a
Macrophages are cells referred to as "big eaters" or "killing machines" that destroy any foreign agents (pathogens) or antibodies found in the body.
Using the approximate values of part (b), calculate the gradient of the potential along the x axis, and show that the negative gradient is equal to the x component Ex of the electric field
If the particle's velocity is perpendicular to the magnetic field at all times, what is the magnitude if the magnetic force exerted on the particle?
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