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A driver travels 10 km east, 20 km north and 50 km in a direction 30 degrees south of west. Draw this path and the final displacement vector. Express the final displacement in components using unit vectors. What is the drivers average velocity if the trip takes 90 minutes?
The acceleration as a function of time of a mass-spring system is given by a=(0.70m/s^2)sin[(3rad/s)t]. a)If the spring constant is 20N/m, what is the amplitude? b)What is the initial velocity? c)what is the mass of object?
An iron bar 40 cm long is braised to a copper bar 40 cm long and of the same diameter. What is the temperature of the junction point
On a level road with its brakes on, a car traveling at 93km/hr stops within 92m when the brakes lock and the car slides.
The minute hand of a wall clock measures14 cmfrom its tip to the axis about which it rotates. find angle from a quarter after the hour to half past
The distance between a loudspeaker and the left ear of a listener is 1.60 m. compute the time required for sound to travel this distance if the air temperature is 20° C.
Wavelengths of light from a remote galaxy are found to be 1.5 % longer than the corresponding wavelengths measured here on earth. What ids the speed of the galaxy relative to earth
Suppose the solenoid filled with a paramagnetic substance such as liquid oxygen. Qualitatively,how will this change your your answer to Part (b)? Will your reply increase, decrease,or remain the same.
A pressure as low as P = 8 ? 10-11 Pa has been obtained. Suppose a chamber contains helium at this pressure and at room temperature, Estimate the mean free path
A note played on a piano is 4719 Hz. If the speed of sound is 347 m/s, what is the wavelength of the note?
The equation of a transverse wave on a string is given by the formula below. Find the linear density of this string in grams per meter
Below are birds-eye views of six identical toy cars moving to the right at 2? Various forces act on the cars with magnitudes and directions indicated below. All forces act in the horizontal plane and are either equivalent or at 45 or 90 degrees to ca..
A certain EM wave has a wavelength of 4e-7 m and a speed of 2.5e8 m/s in a particular material (not a vacuum). What is the wavelength of this wave in a vacuum
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