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Starting from rest, a 12.54-cm-diameter compact disk takes 5 s to reach its operating angular velocity of 1796 rpm. Assume that the angular acceleration is constant. The disk's moment of inertia is
The molecular weight of methotrexate, a pharmaceutical drug, is454.45. It is supplied in 1 mg per vial. You want to treat your culture cells with a final concentration of 1 nanoM methotrexateand wil
An electron starts from rest 5.00 cm from the center of a uniformly charged sphere of radius 3.00 cm. If the sphere carries a total charge of 1.00 10-9 C, how fast will the electron be moving when i
You need to prepare medium for your culture cells. Your salt solution is 10X concentration (commonly used laboratory stock solution), dilute to 1X for use. You also need to add fetal bovineserum for
What is the (a) magnitude and (b) direction of the boat's velocity relative to the ground? Give the direction as the angle of the velocity from due north, positive if to the east and negative if to
A child on the boat walks from front to rear at 3.0 km/h with respect to the boat. What is the child's speed with respect to the ground?
At time t = 0, a projectile is launched from ground level. At t = 2.00 s, it is displaced d = 54 m horizontally and h = 51 m vertically above the launch point. At the instant it reaches its maximum
Calculate the 95% confidence limits for there sult if it was based upon (a) a single analysis (b) the mean off our analyses,(c) the mean of 16 analyses.
The coefficients of static and kinetic friction between the block and the ramp are 0.5 and 0.3 respectively. (a) Find the maximum value of the applied force F that he must exert before the block moves
A drag racer finished a quarter-mile driving in 10.0 seconds. What is her car's acceleration in meters per second squared (assuming the acceleration is constant)?
Will mildly acidic conditions favour the formation of[Cu(NH3)4]2+(aq) fromCu(OH)2(s)? Use second equasion you wrote in(a) to explain reasoning.(d) Are these equilibrium reactions also redox rea
What are the values of normal stress and shear stress on a plane containing stress 2 and whose normal is at an angle of +65 degrees to the stress 1 direction?
A certain lightbulb has a tungsten filament with a resistance of 19.9 O when at 20.0°C and 138 O when hot. Assume the resistivity of tungsten varies linearly with temperature even over the large
Fernando places a 2.0 kg dictionary on a table top, the sits on top of the dictionary. Fernando has a mass of 52 kg. a) What is the normal force exerted by the tale on the dictionary.
The magnitude of impulse on the skier as he leaves the starting gate is?
A 40.0 g mass is attached to a horizontal spring with a spring constant of 5.0 N/m and released from rest with an amplitude of 25 cm. What is the velocity of the mass when it is halfway to the equil
Limestone(CaCO3) is used to remove acidic pollutants from smoke stack flue gases. It is heated to form lime(CaO), which reacts with sulfur dioxide to form calcium sulfite.
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 2.20 × 106 N, one at an angle 14.0 degrees west of north, and the other at an angle 14.0 degrees east of north, as
A tank containing 20 kg of water at 20C fitted with a stirrer that delivers work to the water at the rate of 0.25kW. How long does it take for the temperature of the water to rise to 30 C if no heat
A 0.0500 kg cube of ice at an initial temperature of -15.0 degrees C is placed in 0.600 kg of water at T= 45.0 degrees C in an insulated container of negligible mass. A). Calculate the final tempera
How many liters of hydrogen gas are collected over water at22°C and 725 mmHg when 0.86 g lithium reacts with water?Aqueous lithium hydroxide also forms.
Calculate the charge in electric potential energy of the system as a 3rd charged particle of -3 micro Coulombs is brought from infinitely far away to a position on the y axis at y= 0.5 m.
Two 2 microCoulomb charges are located on the x-axis. One is at x= 1 m and the other is at x= -1 m. a) Determine the electric field on the y axis at y= 0.5 m.
A closed system consists of 4 objects. Initially, object A has 179 J of energy, object B has 186 J of energy, object C has 126 J of energy, and object D has 163 J of energy. After 278 s have passed,
When a pure sample of tert-butyl bromide isanalyzed by gas chromatography, 2 compnents are observed. one isthe tert-butyl bromide, and other is decomposition product.