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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.
A coffee cup calorimeter containing 100 ml of H2O is used. The initial temeperature of the calorimeter is 23C. If 2.40 g ofCaCl2 is added to the calorimeter.
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?
4.6*102 mL of 0.028 M AgNO3 and6.2*102 mL of 0.018 M Na2CO3 aremixed together. Ksp for silver carbonate is 8.1* 10-12. What is the maximum concentration of Na2CO3 that could exist
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
Polonium-218 is an alpha emitter with a half-life of 3.0 minutes. If a sample contains 55 mg of Po-218 (atomic mass = 218.008965 amu), how many alpha emissions would occur in 25.0 minutes?
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
Find ΔH for the freezing of water at -8.00 degrees celcius. The specific heat capacity of ice is 2.04 J/g. C and its heat of fusion is -332 J/g. What is the ΔE, q and w for 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.
Calculate the work done in joules if the gas expands (a) against a vacuum, (b) against a constant pressure of0.80 atm, and (c) against a constant pressure of 3.7 atm.
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
Gold can be plated out of solution according to the equationAu3+(aq) + 3e- ---> Au(s) What mass of gold in grams will be plated by the flow of 5.5Aof current for 25 minutes?
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
Determine the molecular formula for ibuprofen, a common headache remedy. Analysis ofibuprofen yields a molae mass of 206 g/mol and a percentcomposition of 75.7% C, 8.80% H and 15.5% O
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
Determine the carburizing time necessary to achieve a carbonconcentration of 0.45 wt% at a position 2 mm into an iron-carbonalloy that initially contains 0.20 wt% C. The surface concentrationis to
A ball is thrown vertically upward with a speed of +13.0 m/s. How long does it take to reach its highest point?
A sheet of steel 1.5 mm thick has nitrogen atmospheres on bothsides at 1200oC and is permitted to achieve asteady-state diffusion condition. the diffusion coefficient fornitrogen in steel at this te
Calculate the fraction of atom sites that are vacant for lead atits melting temperature of 327oC (600K). Assume anenergy for vacancy formation of 0.55 eV/atom.