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A 400 kg piano slides 4.0 m down a 30 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. A. Determine the force exerted by the man.
Assuming that radiation with λ=15.0 cm is used, that all the energy is converted to heat, and that 4.184 J is needed to raise the temperature of 1.00 g of water by 1.00 °C, how many photons a
What is the most likely reason OSHA requires ammonium nitrate to be segregated for sulfur or finely divided metals? Explain your answer.
A banked circular highway curve is designed for traffic moving at 79 km/h. The radius of the curve is 155 m. Traffic is moving along the highway at 52 km/h on a rainy day. What is the minimum coeffi
A parallel-plate capacitor has an area of 10.8 cm 2 . The plates are separated by 0.9 mm and are connected across a 60 V battery. Find the magnitude of the charge on each plate.
A 1.17 g sample of an alkane hydrocarbon gas occupies a volume of 674 mL at 28°C and 741 mmHg. Alkanes are known to have the general formula CnH2n+2.
A parallel-plate air-filled capacitor having area 48 cm2 and plate spacing 3.0 mm is charged to a potential difference of 750 V. Find the following values.
The mineral pyrolusite is a compound of 55Mn and 16O. If 63% of the mass of pyrolusite is due to manganese, what is the empirical formula of pyrolusite?
A 218-kg crate is pushed horizontally with a force of 702 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate.
A typical gas cylinder, contains 1.55 cubic feet of gas compressed at 2,200 pounds per square inch. what volume would the gas occupy at normal atmospheric pressure and the same temperature?
A 350. mL solution of 0.150 M HNO3(aq) is mixed with a solution of 230. mL of 0.240 M HCl(aq). How many moles of H+(aq) are present in the final solution?
What is the frictional force acting on the disk?
The slope is 2.85 %, which means that the elevation increases by 2.85 m for every 100 m of horizontal distance. The mass of the roller coaster is 410 kg. Neglecting friction, what is the magnitude o
By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of acetone is 0.790g cm^-3. Calculate the mass of acetone the student should weigh out.
Blocks with masses of 1.0 kg, 7.0 kg, and 9.0 kg are lined up in a row on a frictionless table. All three are pushed forward by a 20 N force applied to the 1.0 kg block.
Calculate the Force of Friction(Ff) for a 5 kg aluminum block being pulled with constant velocity (uniform motion), up a steel plank that is at a 30 degrees angle to the horizontal.
A sample of impure magnesium was analyzed by allowing it to react with excess HCl solution:Mg(s) + 2HCl(aq) => MgCl2(aq) + H2(g)After 1.32 g of the impure metal was treated with 0.100 L of 0.750
One method of estimating the temperature of the center. If the density of the center of the sun is 1.40 g/cm3 at a pressure of 1.30 × 109 atm, calculate the temperature.
Beats of frequency 4Hz are heard when a tuning fork of frequency 1000Hz and a vibrating wire are sounded together. What is the frequency of the wire
Vitamin C is a compound that contains only C, H and O. It& ; has a molar mass of 176.12 g/mol. When a 1.000 g& ; sample is burned, 1.50 g of CO2 and 0.410 g of water are& ; collected after complete
A solenoid 2.00cm in diameter & 10.0cm long has 260turns & Carries a current of 20.0A. Calculate magnetic flux through circular-section area of solenoid.
If 125 cal of heat is applied to a 60.0-g piece of copper at 20.0°C , what will the final temperature be? The specific heat of copper is 0.0920 cal/(g⋅°C) .
What specific physical effect was used to verify the existence of intense magnetic fields in sunspots
The coefficient of sliding friction between a rubber tire and a wet concrete road is .60. Find the minimum time in which a car whose initial velocity is 35 mi/hr can come to a stop on such a road
A 1300- car rolling on a horizontal surface has speed v = 55 when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.4 .What is the spring stiffness constant of the spri