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Q1. An important news announcement is trans- mitted by radio waves to people who are 122 km away, sitting next to their radios, and by sound waves to people sitting across the newsroom, 1.2 m from the newscaster. Take the speed of sound in air to be 345 m/s.
What is the difference in time that the message is received?
Response in units of ms
Q2. Two charges placed the magnitude fql is 3.00uc, but its sign and the of the charge q2 are not known. The direct of the net electric field E at point P is totally in the negative y-direction. (a) Considering the different possible signs of q1 and q2 there are four possible diagrams that could represent the electric field E1 and E2 produced by q1 and q2. Sketch the four possible electric field configurations. (b) Using the sketches from part (a) and the direction E, deduce the signs if q1 and q2. (c) Find out the magnitude of E.
A flight attendant pulls her 72.0 N flight bag a distance of 282 m along a level airport floor at a constant speed. The force she exerts is 33.0 N at an angle of 52.0° above the horizontal.
The flywheel of an engine has a moment of inertia 2.20 {rm kg} cdot {rm m}^{2} about its rotation axis. What is its final kinetic energy.
Potassium iodide has an interplanar spacing of d = 0.296 nm. A monochromatic X-ray beam shows first-order diffraction maximum while the grazing angle is 7.8°. Compute the X-ray wavelength λ .
Assume, instead, that the observer had been moving away from Earth with a speed of 0.80c. How much time would observer have measured for the car to be filled in this case.
A microscope with an eyepiece lens of focal length 1.90 cm and an objective lens of focal length 1.15 cm is used to examine a section of the brain of a sacrificed rat. The distance between the lenses of the instrument is 24.0 cm and final image is vi..
He would like a prescription for contact lenses to serve the similar purpose. What is the correct contact lens prescription, in diopters.
A gasoline engine absorbs 2,600 J of heat and performs 1,000 J of mechanical work in each cycle. Find the total of heat expelled in each cycle.
Determine the simple harmonic motion of the spring what ac velocity is ball moving
Conclude the magnitude and directional angle
Which state is best illustrates kinetic friction
What is speed of the command module
Find out the coefficient of sliding friction
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