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Jake decided to walk from his room to the class 1.4 miles away. The class will start in 13.4 minutes. As he is walking, he is getting more and more concerned about making it on time. So he keeps walking ever a little faster, maintaining a tiny acceleration of 9 mm/s2. Is he going to be late after all?
If you find that he will be late, answer by how many minutes.
Perhaps he will arrive early? Then he did not need to exert himself quite so much! In this case, what is the smallest magnitude of acceleration that would still get him to class in time (the answer may be in either mm/s2, or in m/s2).
Ligh of wavelength 610 nm is incident on a slit 0.20 mm wide, what is the width of the central maximum
A lens for a 35-mm camera has a focal length given by f = 47 mm. What is the magnification of the image on the film
The force constant of a spring is 800 N/m and the unscratched length is 0.63 m. A 4.6 kg block is suspended from the spring. An external force slowly pulls the block down, until the spring has been stretched to a length of 0.76 m.
A 5.0cm thick ice sheet covers a lake in early spring. The ice density is 910kg/m3. If the spring sun radiates an average of 155W/m2 onto the ice, how much time will it take to melt the ice
A ball is kicked at a 47.6 degrees angle above horizontal and reaches its highest position 23.4 m above ground level. Find the horizontal distance the ball travels
An object's terminal velocity is 52.135 m/s on a dry day (when the density of air is 1.21356 kg/m^3. What is the density of the humid air
The moon, mass 7.35×1022 kg, rotates around the earth in about 28 days. If the moon is about 3.84×105 km from the earth, What is the moons gravitational attraction (pull) on the earth
A guitar string produces 4 beats/second when sounded with a250Hz tuning fork and 9 beats/second when sounded with a 255 Hztuning fork. What is the vibrational frequency
an electron experiences a magnetic force of magnitude 4.60 x10-15 when moving at an angle of 60.0 degree with respect
A 208.3 gram pendulum bob on a 1.92 meter long string is pulled to a height above its lowest position such that it makes an angle of 19.0 degrees with the vertical. Determine the speed of the pendulum bob
Two capacitors C1 = 3.2 ?F, C2 = 13.5 ?F are charged individually to V1 = 19.0 V, V2 = 5.6 V. Calculate the final potential difference across the plates of the capacitors once they are connected
Standing on the ground 2.6m from a building, you want to throw a package from your 1.5-m shoulder level to someone in a window 3.9m above the ground. At what speed should you throw the package
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