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A block with mass m = 10 kg rests on a horizontal surface. Us = .45 and uk = .25. Determine the friction force when an external horizontal force of 15n is applied on the block? Explain why is the fr
Plan A the salary of $100 per week plus the commission of 3% of gross sales. Plan B the salary of $75 per week plus sales. For what gross sales is plan B good?
At 25C the volume of a sample of pure HCl gas was 189mL and108mm Hg. It was wholly dissolved in about 60mL of water and titrated with an NaOh soution; 15.7mL of the NaOH solution were needed to neut
where are the constant current and the system is "Ohmic" beginning with the relationship.... Illustrate that resistance R of the conducting spherical shell is given by?
1st person walks 5 miles an hour faster than the 2nd. Compute rate of speed of every person if they meet in 1 hour and 10 minutes.
A uniform wire of 30 m long consists of a resistance of 90 OHMS and a cross sectional area of 6.0 X 10^-6 m^2? Determine its resistivity in ohms * m?
(i) When the box is being lifted at a constant speed of 2.0 m/s, determine the power delivered by the person pulling on the rope?
If the solubility of the product and reactant were switched, how would you follow the isomerization process and how would you know when it was complete?
A hair dryer function at 1800 watts having terminal voltage of 120 volts. Find out the given: i) The resistance R of the hair dryer
A platinum wire consists of 20Ω resistance at 20°C. The temperature coefficient of resistivity is 3.9 x 10^-3(degrees Celsius)^-1 . Determine the resistance in ohm at 100°C?
The rain gutter is to be made of rectangular aluminum sheets 12 inches wide by turning up sides edges 90 degrees.
The person whose near-point distance is 39 cm wears a pair of glasses which are 2.0 cm from her eyes. With the help of these glasses, she can now focus on objects 25 cm away from the eyes. Determine
A charge of +3.0 µC is at first 0.20 m from a fixed -6.0 µC charge and is then moved to a position 0.50 m from the fixed charge. (i) Determine how much work was needed to move the charge?
A satellite orbiting the moon much near the surface consists of a period of 110 min. Determine the acceleration of moon due to gravity?
A capacitor of .22μF is charged by a 1.5 V Battery. After being charged, the capacitor is joined to a small electric motor. Supposing 100% efficiency, to what height can the motor elevate a mass
The two angled ropes employed to support a crate can withstand a tension of 1500 N before they break. Determine the biggest mass the ropes can support? Angle 1 = 55 and angle 2 = 35.
Describe the function of the acetic acid if in a dry 100ml conical flask dissolves 3.2g of acetanilide in 5mlof glacial acetic acid by warming gently on the steam bath.
Determine the potential difference needed to accelerate protons from rest to 10% of the speed of light.
From the point 48 feet from base of the redwood tree, angle of elevation to top of tree is 56.3degrees. Determine height of tree to nearest tenth of the foot.
A block of 5.5 kg slides down a frictionless incline making the angle of 70.0° with the horizontal. (i) Determine the net work done on the block if the block slides 1.7 m (measured all along the i
The projectile is launched from the platform 20 feet high with the initial velocity of 144 feet per second, height h of projectile at t seconds after launch is provided by h = -16t^2 + 144t + 20 fee
Employ vector components to determine the magnitude of each of such pulls and the direction of the smaller pull. Suppose that the smaller pull consists of a component directed to the north.
Determine the pH of a mixture of 0.3 M carboxylate ion (COO-) and 0.8 M carboxylic acid (COOH). The pka of carboxylic acid is 2.76.
The spheres encompass a combined charge of +55μC and repel one other having a force of .75 N. Determine the surface charge density on each and every sphere?
i) Assume that the coal is piled up in an 11.0 m x 15.0 m room. Determine how tall should the pile be to operate the plant for one day? ii) Determine the thermal efficiency of power plant?