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A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1040 Hz, What is the speed of the bird, expressed as a percentage of the speed of sound
A listener increases his distance from a sound source by a factor of 3.05, what is the change in the sound intensity level in dB
On a climb up mt. Whitney, the atmospheric pressure drops to 467 mmHg. What is the pressure in terms of the following units? a) atm; b) torr; c) in. Hg; d) Pa.
A beam of electrons is accelerated from rest through a potential difference of 0.110kV and then passes through a thin slit, How wide is the slit
A radar for tracking aircraft broadcasts a 12.0GHzmicrowave beam from a 2.00m -diameter circular radar antenna, What is the diameter of the radar beam at a distance of 30.0km
Which of the following statement(s) describes the pressure of gas? a) the force of gas partials on the walls of the container; b) the number of gas particals in a container; c) the volume of the con
One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. estimate the diameter of the pinh
Identify the property of gas that is measured in each of the following: a) 425 K; b) 1.0 atm; c) 10.0 L; d) 0.50 mol of He.
A galvanometer with a full-scale sensitivity of 700?A and a coil resistance of 58? is to be used to build an ammeter designed to read 10A at full scale
typical industrial electrolysis cells can produce approximately 6kg of F2 in a 24 hours day. At what current (A) are these cells operating for this to be true
A capacitor in a single-loop RC circuit is charged to 57% of its final voltage in 1.3s, Find the percentage of the circuit's final voltage after 4.3s
Using kinetic molecular theiry of gases to explain each of the following: a) A container of nonstick cooking spray explodes when thrown into a fire; b) The air in a hot air balloon rise. c) You can
A series RC circuit with C = 56?F and R = 6.4? has a 25V source in it. With the capacitor initially uncharged, an open switch in the circuit is closed, What is the voltage across the resistor immedi
Three resistors with values 0.90? , 2.9? , and 4.2? are connected in parallel in a circuit with a 6.4V battery. What is the total equivalent resistance
Suppose you need to image the structure of a virus with a diameter of 50 nm, For light of wavelength 2.5nm, what is the energy (in eV) of a single photon? In what part of the electromagnetic spectru
The magnetic force per meter on a wire is measured to be only 21% of its maximum possible value
A solid disk rotates in the horizontal plane at an angular velocity of 0.036 rad/s with respect to an axis perpendicular to the disk at its center, what is the angular velocity of the disk
A playground carousel is free to rotate about its center on frictionless bearings, and air resistance is negligible, What is the person's mass
Two forces, F? 1 and F? 2, act at a point. F? 1 has a magnitude of 8.20N and is directed at an angle of 62.0?, below the negative xaxis in the third quadrant What is the x component of the resultant f
A near-sighted person might correct his vision by wearing diverging lenses with focal length f = -45cm, Use ray tracing to determine the location of the image
What minimum votage is required to electrolyze anhydrous HF. the H-F bond is so polar that liquid HF is essentially composed of H^+ and F^- ions.
Identify the cell reaction that will give the maximum operating voltage. Write out the oxidation and reduction half reactions, showing how they sum to the cell reaction. Identify the reaction that t
Indicate whether each of the following describes the oxidizing agent or the reducing agent in an oxidation-reduction reaction: a)the substance that is reduced. b)the substance that loses electrons.
The index of refraction for red light in water is 1.331, what are the underwater angles of refraction for the blue and red components of the light
what is the oxidation number of the specified element in each compound or polyatomic ion: a)C in ZnCO3 b)Fe i Fe(NO3)2 c)Cl in ClF4^- d)S in S2O3^2-