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Cloverleaf exits are approximately circular. A 1712 kg automobile is traveling 70 mph while taking a cloverleaf exit that has a radius of 46.4 m. Calculate the centripetal acceleration of the car an
Calculate the energy needed to raise the temperature of a850 g block of aluminum from 22.8oC to94.6oC. Calculate the molar heat capacity of aluminum.
An 80-cm-long, 1.0-mm-diameter steel guitar string must be tightened to a tension of 2000 N by turning the tuning screws. By how much is the string stretched?
A 311 g sample of water absorbs infraredradiation at 1.06 x 104 nm from a carbon dioxidelaser. Suppose all the absorbed radiation is converted to heat.
The 21.0- child accelerates too, but with a smaller acceleration than that of the sled. Thus, the child moves forward relative to the ice, but slides backward relative to the sled. Find the accelera
0.200 moles of an unknown monobasic weak base are added to 1.20 Lof water. The resulting solution has a pH of 9.300. What is the Ka of the conjugate acid of the unknown base? Assume no change in vol
A car alternator consists of a 220-turn coil 12 cm in diameter in a magnetic field of 0.10 T. If the alternator is turning at 1100 rpm, what is its peak output voltage?
When he accelerates from a stoplight, the tassel deflects backward toward the rear of the car at an angle of 5.87 degrees relative to the vertical. a) Find the tension in the string holding the tass
What would be formed if ester ethyl propanoate was treated with sodium ethoxide; resulting in a claisen product after work up with dilute acid. Please show the reaction.
A 9.0 resistor and a 6.0 resistor are connected in series with a power supply , the voltage drop across the 6.0 resistor is measured to be 12 V. what is the voltage output of a power supply?
To move a large crate across a rough floor, you push on it with a force F at an angle of 21 degrees below the horizontal, Find the force necessary to start the crate moving, given that the mass of t
Calculate the wavelength (in nanometers) of a photon emitted by ahydrogen atom when its electron drops from the n =6 state to then = 2 state. In nanometers...
Assume that the axis is located where the branch joins the tree trunk and is perpendicular to the plane formed by the branch and the trunk.
A 6.0-kg block is released from rest 80 m above the ground. When it has fallen 60 m its kinetic energy is approximately:
Nickel (II) chloride dissolves in water to form a lightgreen solution. What species (ions) are present in solution i.e.,what is "swimming around" in the aqueous solution? writh the formulas.
An object is placed 10.0 cm in front of a mirror. What type must the mirror be to form an image of the obect that is 2.00 m away from the mirror? What is the magnification of the image?
Predict the initial rate if [NO]= 0.30 M and [H2]=0.15 M What would happen to the initial rate of the reacton if[NO]=0.60 M and [H2]=0.15 M instead. Does your result make sense interms of order of r
A nonconducting sphere of radius 7.00 cm carries a uniform volume charge density ? = 430 nC/m^3 What is the total charge of the sphere? Find the electric field at the following radii.
What is the hydroxide ion concentration of an aqueous 0.00370 M caffeine solution? The most basic nitrogen atom in caffeine has a Kbof 4.1x10-4
We completed a lab in which we titrated vinegar. We poured 50mL water into an Erlenmeyer flask to which we added 2 drops of phenolphthalein and 1 mL vinegar.
A child holds a candy bar 15.5 cm in front of the convex side-view mirror of an automobile. The image height is reduced by one-half. What is the radius of curvature of the mirror?
What are the freezing and boiling points of a solution that contains 10.0 grams of naphthalene, C10H8, dissolved in 50.0 grams of benzene?
Magnesium metal has a specific heat of 1.04. A 70g sample of Mg at a temp of 99.8 degrees C is added to a beaker containing 50.0g of water at 30.0 degrees C. What is the final temperature.
Assuming that a drop is 0.05 mL, how many drops of a 0.10 M KI solution must be added to 100 mL of 0.010 M Pb(NO3)2 to just get aprecipitate to form? (That is, how many drops of KI are required
A thin nonconducting spherical shell of radius 6 cm carries a uniform surface charge density s = 8 nC/m^2. (a) What is the total charge on the shell? (in nc)