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A force of 70 N exerted at an angle of 30 degrees below the horizontal on a block of mass 8 kg that is resting on a table. What is the magnitude of the net force on the block in the x direction if t
A 1.4 kg block is attached to a horizontal spring with spring constant 2800N/m. The block is at rest on a frictionless surface. A 8.90g bullet is fired into the block, in the face opposite the spri
A material contains 50.0 grams of carbon 14, and is 300,000 years old. It has a half life of 5730 years. What was its original mass?
A steel tank contains a large quantity of compressed air. When the tank is submerged for an hour in a cold-water tank, the air loses 245 J of heat to the water. What is the change in the internal e
A 1250kg is pulling a 325kg trailer. Together the car and trailer have an acceleration of 2.15m/s squared. Determine the net force on the car-trailer combination.
An outfielder throws a 0.150 kg baseball at a speed of 39.6 m/s and an initial angle of 34.0° What is the kinetic energy of the baseball at the highest point of its trajectory?
A pebble is dropped down a well and hits the water 1.1s later. Using the equations for motion with constant acceleration, determine the distance from the edge of the well to the water's surface.
A 62 kg boy and a 45 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 3.3 m/s2, determine the magnitude of
Calculate the amount of work (in electron-volts) it would take to move an electron from 11.6 to 13.4 away from a +3.50 point charge.
Two identical loudspeakers are 3.2 m apart. A person stands 5 m from one speaker and 4.2 m from the other. What is the lowest frequency at which destructive interference will occur at this point? Th
Three resistors with a resistance of 12 ohms, 8 ohms, and 24 ohms are in a series circuit with a 12 volt battery.
A 140 g disk sits on a horizontally rotating turntable. The turntable makes exactly 3 revolutions each second. The disk is located 8 cm from the axis of rotation of the turntable.
A 394 kg mass is brought close to a second mass of 138 kg on a frictional surface with coefficient of friction 0.6. At what distance will the second mass begin to slide toward the first mass? The a
"Write a one page essay discussing common household items (chemicals) that you would expect to find inside a cell
A light bulb with a resistance of 10.0 coulomb allows a 1.20 A current to flow when connected to a battery. (a)What is the voltage of the battery? (b) What is the power of the light bulb?
Consider a supertanker, with a mass of 2.4*10^8 kg. If it is pushed by a rocket motor (thrust force of 5.0*10^6 N) and is subject to no other forces, what will be the magnitude of its acceleration?
What effect would a decrease in PH have on the amount of potassium ions in the urine?
A dry cell does 7.5 J of work through chemical energy transfer 5.00 C between terminals of the cell. What is the electric potential between the two terminals?
Explaining why the process of mitosis and meiosis are both important to a living organism. When would an organism need to undergo the process of mitosis and meiosis? What would happen if meiosis did n
A uniform meter stick is placed on and parallel to the x axis with the 50 cm mark at the origin. It is pivoted at the 50 cm mark. A 5.3 N force is applied at the 21 cm mark, and a (-7.0) N force is
A bird flies 5.00 m at 50.0° and then 3.00 m at -30.0°. What is the bird's total displacement in polar notation?
Write a one page essay discussing common household items (chemicals) that you would expect to find inside a cell.
A 5.0m--long ladder has mass 12.5 and is leaning against a frictionless wall, making a 66 angle with the horizontal. If the coefficient of friction between the ladder and ground is 0.42, what is th
Create a coordinate system by making east the positive x axis, north the positive y axis, and altitude the z axis. An aircraft is approaching at an altitude of 5.0 km, a horizontal distance of 35 km
1. From a cell's point of view, what is the purpose of a cell, and what is the purpose of a gene? From a gene's point of view (according to Dawkins), what is the purpose of a cell and what is the purp