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A jet airliner moving initially at 300 mi/h to the east abruptly enters a region where the wind is blowing at 100 mi/h toward the direction 30.0 degrees north of east. What are the new speed and direction of the air craft relative to the ground?
An apartment has a living room whose dimensions are 2.8 m x 5.1 m x 5.6 m. what is the mass (in grams) of the air
What is the relationship between the heat of fusion of a solid and the amount of heat needed to melt it?
What is the difference between series and parallel circuits? Specify in words and algebraic formula, if possible, the relationships between current, voltage, and resistance in each type of curcuit.
A circular loop of radius 24.9 cm is located in the plane of the paper inside a homogeneous magnetic field of 0.280 T pointing into the paper. Calculate the current induced in the loop during that time
A small fly of mass 0.20 g is caught in a spider's web. The web vibrates predominately with a frequency of 6.0 Hz. (a) What is the value of the effective spring stiffness constant k for the web? N/m (b) At what frequency would you expect the web to v..
A force vector has a magnitude of 594 newtons and points at an angle 37o of below the positive x axis. What are (1) the x scalar component and (2) the y scalar component of the vector.
A woman at an airport is towing her 20.5 kg suitcase at constant speed by pulling on a strap at an angle of ? above the horizontal. What angle does the strap make with the horizontal
A loudspeaker sounds a 600 Hz tone. Find the difference in the wavelength of the sound waves produced in air at -5°C and at 36°C
An empty rubber balloon has a mass of 0.0109 kg . The balloon is filled with helium at a density of 0.178 kg/m3. what is the tension in the line
define the speed with which the cart reaches positions 3, 2, and 1 (in that order). Neglect friction. Let g = 9.81 m/s2.
Two window washers, Sally and Tom, are on a 3.00 m long 345 N uniform scaffold supported by two cables attached to its ends. Sally weighs 750N and stands 1.00 m from the left end. Two meters from the left end is the 500 N washing equipment.
The work function for potassium is 2.25eV. A beam with a wavelength of 400nm and an intensity of 10^-9W/m^2. find the maximum kinetic energy of the photelectrons
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