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A car starts from rest at a stop sign. It accelerates at 2.0 m/s2 for 5.7 seconds, coasts for 2.3 s , and then slows down at a rate of 1.5m/s2 for the next stop sign.
How far apart are the stop signs?
two boxes are sitting on a horizontal frictionless surface. Box A has a mass of 30kg and box B has a mass lof 20 Kg. what is the tension in the connecting rope
A step-down transformer produces a voltage of 7.0V across the secondary coil when the voltage across the primary coil is 120V. What voltage appears across the primary coil of this transformer if 120V is applied to the secondary coil?
a future space station in orbit about the earth is being powered by an electromagnetic beam from the earth. the beam
A 120-V motor has mechanical power output of 3.00 hp. It is 80.0% efficient inconverting power that it takes in by electrical transmission intomechanical power.
A lens is located 30 centimeter to the right of an object, with an image clearly focused on a screen 45 centimeter from the lens. Evaluate the focal length of each lens
if the capillaries of an average adult were unwound and spread out end to end they would extend to a length over 40 000
The magnetic field due to a currnt pulse in a single long, straight axon nerve fiber is 1.2X10^-10T at a distance 0.0013m from axon. What is the current in the axon
An electron moving parallel to the x axis has an initial speed of 3.68 multiplied by 106 m/s at the origin. Calculate the potential difference between the origin and that point
A typical ten-pound car wheel has a moment of inertia of about0.35 \; \rm kg\cdot m^2. The wheel rotatesabout the axle at a constant angular speed making 70.0 fullrevolutions in a time interval of 7.00 s.
A train is in the process of speeding up, as it nears the top of a rounded hill, as shown below. Show that the normal force of the tracks on the train is 185,250 N
A mechanic pushes a 2.80 103-kg car from rest to a speed of v, doing 4,650 J of work in the process. During this time, the car moves 26.0 m. calculate the horizontal force exerted on the car
A typical red blood cell subtends an angle of only 1.7×10?5rad when viewed at a person's near-point distance of 25 cm. find the magnitude of the angle subtended by the red blood cell
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