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A log is floating on swiftly moving water. A stone is dropped from rest from a 78-m-high bridge and lands on the log as it passes under the bridge. If the log moves with a constant speed of 5.2 m/s,
A diver 50.0 m deep in 10.0^\circC fresh water exhales a 1.00-cm-diameter bubble.What is the bubble's diameter just as it reaches the surface of the lake, where the water temperature is 20.0^\circC?
What is the current in the circuit when the temperature of the carbon rises to 61 degrees celsius? Use a temperature coeffiecient of -0.0005 degrees celsius inverse. Answer in unites of mA.
A wire with a circular cross section and a resistance R is lengthened to 8.86 times its original length by pulling it through a small hole. After being pulled through the hole, the total volume of t
A beam of electrons is shot into a uniform downward electric field of magnitude 1.01 x 103 N/C. The electrons have an initial velocity of 1.05 x 107 m/s, directed horizontally. The field acts over a s
The filament in an incandescent light bulb is made from tungsten (resistivity 5.6 x 10-8 O·m). The light bulb is plugged into a 120-V outlet and draws a current of 1.53 A. If the radius of the
Find the charge on an oil drop weighing 3.18 x 10-14 N and suspended in a downward field of magnitude 3.31 x 104 N/C.
A rocket is launched at an angle of 50.0° above the horizontal with an initial speed of 101 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 31.0 m/s2.
Two stationary positive point charges, charge 1 of magnitude 3.00 and charge 2 of magnitude 2.00 , are separated by a distance of 40.0 .
A boy pushes a 3.1 kg. book against a vertical wall with a horizontal force of 40 N. What is the minimum coefficient of friction that will keep the book in place without sliding?
A rock is dropped from a tall bridge into the water below. If the rock begins with a speed of zero and has a speed of 12 m/s just before it hits the water, what is the height of the bridge?
After struggling to remove a refrigerator (mass = 100 kg.), you finally apply enough force to get it moving. What is the minimum force needed to keep it moving with a constant velocity. The coeffici
A car is moving with velocity of 20 m/s when the brakes are applied and the wheels lock (stop spinning). The car then slides to a stop in 40 m. Find the coefficient of kinetic friction between the t
Furthermore, he claims that he can do this by launching the ball at the relatively low angle of 25° above the horizontal. To evaluate his claim, determine the speed with which this quarterback m
Show that the function in part (a) can be written as f(x + vt) + g(x - vt), and determine the functional forms for f and g, assuming that f(x) = g(x) = 0 for x = 0.
A car is traveling at 25 m/s when the driver spots a large pothole in the road a distance of 30 m. ahead. She immediately applies her brakes. If her acceleration is negative at -27 m/s^2, does she m
First Question: Sketch the direction of the net electric field due to the two charges at point A (with tail at A)
A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 45.0 min at 55.0 km/h, 13.0 min at 95.0 km/h and 55.0 min at 55.0 km/h, and sp
Two small plastic spheres are given positive electrical charges. When they are a distance of 14.2 cm apart, the repulsive force between them has a magnitude of 0.210 N. What is the charge on each sp
When these forces begin to act, the velocity of the duck is 0.11 m/s in a direction due east. Find the magnitude and direction (relative to due east) of the displacement that the duck undergoes in 2
On the left side of the tube, the depth of the oil is 2.40 . The density of the water is 1.00 * 10^3kg/m3, and the density of the vegetable oil is 920kg/m3. Find difference in height between the two s
A ball is thrown vertically upward with a speed of +13.0 m/s. How long does it take to reach its highest point?
The plate separation of a charged capacitor is 0.1031 m. A proton and an electron are released from rest at the midpoint between the plates. Ignore the attraction between the two particles, and dete
A boat is traveling with a velocity of 5 km/hr upstream. The river is flowing at a velocity of 2km/hr downstream. What is the velocity of the boat compared to the riverbank?
A rocket is launched at an angle of 55.0° above the horizontal with an initial speed of 101 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 30.0 m/s2.