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A roller coaster reaches the top of the steepest hill with a speed of 6.8 kilometer per hour. It then descends the hill, which is at an average angle of 40o and 45 meter long. Determine what will its speed be when it reaches the bottom?
Does the growth of a plant or animal violate the second low.
A boxcar of mass 5.32 x 10^4 kg is rolling south at 3.49 m/s when it collides and couples with another boxcar that is rolling north at 5.12 m/s. Find the mass of the boxcar
A mirror creates an image of magnification ?1/3. (a) Is the image upright or inverted? (b) If the object is 7.75 cm tall, what is the height of the image
In an RLC series circuit that includes a source of alternating current operating at fixed voltage and frequency, the resistance R is equal to the inductive reactance. If the plate separation of the capacitor is decreased to one half of its original v..
Two tiny, spherical water drops, with equal charges of -4.00 x 10-17 C, have a center-to-center separation of 1.4 centimeter. Find the magnitude of electrostatic force acting between them
A woman slowly lifts a box weighing 48.0 N from the floor to a shelf 1.50 m above, Find the net work done on the box
Playing near a road construction site, a child falls over a barrier and down onto a dirt slope that is angled downward at 42° to the horizontal, What is the coefficient of kinetic friction between the child and the slope
Rhea, one of Saturn's moons, has a radius of 765 km and an acceleration due to gravity of 0.278 m/s2 at its surface. Calculate its mass and average density.
Three electrons are located at the vertices of an equilateral triangle, one at each vertex, find the magnitude of the net electrostatic force on each electron
a 8.2 nc charge is located 1.7 m from a 4.9 nc charge. find the magnitude of the electrostatic force that one charge
An inductor (L = 400 mH), a capacitor (C = 4.43 F), and a resistor (R = 500 ?) are connected in series. A 50.0-Hz AC source produces a peak current of 250 mA in the circuit. (a) Calculate the required peak voltage Vmax. (b) Determine the phase ang..
What is the pressure change in water going from a 3.0- cm-diameter pipe to a 2.1- cm-diameter pipe if the velocity in the smaller pipe is 5.0 m/s
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