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The Moon's mass is 7.36x10^22 kg and its assumed circular orbit has radius 3.84x10^8 and a period of 27.3 days. Find the moons kinetic energy.
With its double helix structure, DNA is coiled like a spring. A biophysicist grabs the end of a DNA strand with optical tweezers, What's the DNA spring constant
A 440.0-N force accelerates a go-cart and its driver from 10.1 m/s to 18.1 m/s in 5.20 s. What is the mass of the go-cart plus driver
An object moves 2.90m in the + x- direction under the influence of a 148 N force directed 42 degrees above the x-axis. Find the work done on the object
If Galileo dropped a 2.37 kg cannon ball from the 58.5m Tower of Pisa, how much work did gravity do on the ball
Flux and nonconducting shells. A charged particle is suspended at the center of two concentric spherical shells that are very thin , What is the charge of the central particle
A slingshot consists of a rubber strap attached to a y-shaped frame, with a small pouch at the center of the strap to hold a rock or other small projectile. FIND the potential energy of the system p
Two converging lenses which have focal lengths of +3.0 cm and +2.0 cm are 10 cm away from each other. find the height of the image formed by the seconds lens
Helium gas with a volume of 2.60L under a pressure of 1.70atm and at a temperature of 43.0 oC is warmed until both the pressure and volume of the gas are doubled. How many grams of helium are there
A capacitor is consists of two short sections of parallel wires in air. One wire is found to be of the voltage of 56 V, What is the capacitance of the two wires
The current supplied by a battery in a portable device is typically 0.131 A. Find the number of electrons passing through the device
Three identical capacitors are connected in parallel to a battery. If a total charge of Q flows from the battery, how much charge does each capacitor carry
A 600-kg geosynchronous satellite has an orbital radius of 6.6 Earth radii. What gravitational force does Earth exert on the satellite
Students in a fraternity house want to be able to spray water 25 m across their neighbor's yard onto a patio. What size nozzle do they need
A wooden dowel (cylinder) has a diameter of 2.20 cm. Determine the density of the dowel
Two small metallic spheres, each of mass 0.20 g, are suspended as pendulums by light strings from a common point, what is the magnitude of the charge on each sphere
An airplane pilot wishes to fly due west. A wind of 80.0is blowing toward the south. What is the speed of the plane over the ground
A single slit is illuminated with monochromatic light, and a screen is placed behind the slit to observe the diffraction pattern. what would be the width of the central maximum
Two pencils have the same average density (500 kg/m^3). The mass of the mechanical pencil is twice the mass of the conventional pencil. Which accelerates at the greater rate
the blood plays an important role in removing heat from th ebody by bringing the heat directly to the surface where it can radiate away. nevertheless, what is the thermal conductivity of this person
A free electron and a free proton are exactly 1.2cm apart. Find the magnitude of the acceleration of the proton
When two parallel slits are illuminated with monochromatic light of wavelength 632.8 nm, What is the distance between the parallel slits
As shown in the figure, a square has sides of d = 5.0 cm with a charge of Q = -18.0 µC at one corner (a) and with charges of q = +6.0 µC, Find the electric field at the center of the squa
A small object is located 31.6{\rm cm} in front of a concave mirror with a radius of curvature of 39.0{\rm cm}. Where will the image be formed
A plastic rod is rubbed with a cloth, and in the process it acquires a charge of ?2.1×10E?8C. How much does the mass of the rod increase by