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A test is fired stright up from rest with a net acceleration of20m/s2. after 4 seconds the motor turns off, but the rocket continues to coast upward. what maximum elevation does the rocketreach?
What daily energyintake, in Calories, is required to maintain these basic processes?This is the minimum daily caloric intake needed to avoidstarvation.
A college professor can see objects clearly only if they are between 70 and 510 cm from her eyes. What is the power of the bottom lens
Two blocks with different mass are attached to either end of alight rope that passes over a light, frictionless pulley that issuspended from the ceiling. The masses are released from rest, andthe more massive one starts to descend.
a pilot can withstand ten times the acceleration due to gravity 10 gs if he is wearing a special tight-fitting g-suit
An AC source has an output rms voltage of 99.5 V at a frequency of 43.0 Hz. The source is connected across a 27.0-mH inductor.
A uniformly charged rod of length L and total charge Q lies along the x axis as shown in Figure P23.36. (a) Find the components of the electric field at the point P on the y axis a distance d from the origin. (b) What are the approximate values of th..
A fast train has a speed of 111 km/hr. Because its wheels have a limited grip to the railway, what speed must the train mantain to keep the acceleration at the limit
A car rounds a circle of radius 150m, going at 11.5 m/s. What's the car's acceleration if its speed is constant
A 1.80Kg brick is sliding next to on a rough horizontal surface at 13.5m/s .If the brick stops in 4.80, how much mechanical energy is lost.
An old-fashioned vinyl record rotates on a turntable at 49rpm . What are the angular speed in rad/s and the period of the motion
After a golf ball is hit it takes off with an initial speed of 20.9 m/s and at an angle of 32.5° with respect to the horizontal. How far would the ball fly if the initial speed was doubled
When a moving car of small mass collides with the stationary car of large mass, after the collision
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