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A subway train rounds an unbanked curve at 70 km/h. A traveler hanging onto a strap notices that an adjacent unused strap makes an angle of 18o to the vertical. Find what is the radius of the turn?
A 59-kg woman cheats on her diet and eats a 457-Calorie (457 kcal) jelly doughnut for breakfast. How many joules of energy are the equivalent of one jelly doughnut? =______ J How many stairs must the woman climb to perform an amount of mechanical ..
A proton is released from rest at x = -3.00 cm in a uniform electric field of magnitude 1620 N/C, What is the change in potential energy when the proton reaches x = 5.00 cm
The coefficients of static and kinetic friction between a 67 kg box and a horizontal surface are 0.56 and 0.32, respectively. Illustrate what is the acceleration of the object if a 335 N horizontal force is applied to the box?
A block with mass of 4 kilogram is compressed a distance d against a spring with a spring contrast of 250 N/m. Calculate by what amount was the spring initially compressed
in a heart pacemaker a pulse is delivered to the heart 83 times per minute. the capacitor that controls this pulsing
in an ideal rankine cycle condensatefeedwater enters a pump at temperature of 102 degrees f and exits at a temperature
q1. megans mass is 30 kg. she climbs the 4.8 m ladder of a slide and reaches a velocity of 2.8 ms at the bottom of the
An electron moving along x axis with a constant speed of v = 5x10^6 m/s i enters the region of a uniform electric field, What is the verticle displacement y of the electron 4 ns later
A 2.0-C charge moves with a velocity of (2.0i + 4.0j + 6.0k) m/s and experiences a magnetic force of (4.0i - 20j + 12k) N. The x component of the magnetic field is equal to zero. Find out the y component of the magnetic field.
A Federation star ship (2.0×10^6 kg) uses its tractor beam to pull a shuttlecraft (2.0×10^4 kg) aboard from a distance of 10.0 km away. The tractor beam exerts the constant force of 2.50 X 10^4N on the shuttlecraft. Both spacecraft are initially a..
A fan blade rotates with angular velocity given by ?z(t)= ? ? ? t2, where ? = 5.45rad/s and? = 0.835 rad/s3. Calculate the angular acceleration as a function of time
A 200 kg communications satellite is placed into a circularorbit around the Earth with a radius of 4.23 x 107m(26,000 miles). Find the gravitational force on the satellite
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