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What is the final molarity of a solution made by mixing 100 mL of 0.4M NaCl with 400 mL of 0.2M NaCl?
Consider a cylindrical segment of a blood vessel 2.9 cm long and 1.70 mm in diameter. What additional outward force would such a vessel need to withstand in the person's feet compared to a similar
You may assume there is no friction between the stick and the bowling ball, though friction with the floor must be taken into account. Find the magnitude of the force exerted on the stick by the bow
Describe the general pattern of alternation of generation in plants. Explore why the gametophyte has been reduced to a part (or parasite) of the sporophyte as plants have evolved. Present and defend y
Recall that the surface brightness of an exponential disk has the form I(R)= I0e^(-R/hR)where I0 is the central surface brightness and hR is the disk scale length. The total brightness is given by i
What ten most precisely describes the cellular process of breaking down large molecules into smaller ones
For the circuit shown below, C = 0.123 µF and = 103 V. The switch throw is rotated to contact b after having been at contact a for a long time, and 3.47 s later the potential difference acros
A doubly charged helium atom whose mass is 6.6 10-27 kg is accelerated by a voltage of 2200 V. (a) What will be its radius of curvature if it moves in a plane perpendicular to a uniform 0.308 T field?
Should humans strive to preserve a representative sample of all biomes or aquatic zones?
How do cnidarians gain and process energy?
Culture teaches people what values are important and may determine if they view themselves as independent, emphasizing being unique and expressing oneself, or interdependent, emphasizing a social c
A brown eyed homozygous male mouse mates with a blue eyed female mouse, what are the phenotypes and genotypes of their offspring? What are the genotypes of the parents?
What is the moment of inertia of the door? If you let go of the open door, what is its angular acceleration immediately afterward?
Find the average forces exerted on (a) the car that hits a line of water barrels and takes 1.8s to stop, and (b) the car that hits a concrete barrier and takes 0.5s to stop.
A 25 kg chair initially at rest on a horizontal floor requires a 363 N horizontal force to set it in motion. Once the chair is in motion, a 334 N horizontal force keeps it moving at a constant veloc
Describe a controlled experiment that could have produced the temperature or ph
A person lifts a 500N barbell overhead. the barbell is 1.84m long and half the weight is loaded on each(assuming the bar is weightless). if the hands grip the bar 30.0cm and 40.0cm on each side fro
Consider the changes that occurred both structurally and functionally as plants evolved to their modern forms. If you were to discover a totally new plant to you, what characteristics would you look f
To hoist himself into a tree, a 69.0 kg man ties one end of a nylon rope around his waist and throws the other end over a branch of the tree. He then pulls downward on the free end of the rope with
A point charge of +5Q is placed at the center of a square. When a second point charge of -Q is placed at one of the square's corners, it is observed that an electrostatic force of 3 N acts on the p
The binary star system Krell consists of two stars, Krell A and Krell B, orbiting each other, with no other ojects nearby. Find the ratio of the orbit speeds vA/vB.
Explain how the long-term survival of a species depends on resources that may be limited from time to time.
A 27 kg loudspeaker is suspended 3.0 m below the ceiling by two cables that are each 50 degrees from vertical. What is the tension in the cables?
Calculate the magnitude of the electric field at one corner of a square 1.1 m on a side if the other three corners are occupied by 3.05x10-6 C charges in N/C.
A 8.1 cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.710 T pointing up. During the course of 0.160 s, the field is changed to one of 0.280 T