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a certain spring mass system is observed to have a period of 20sec if the spring is now replaced by a spring that is
a microscope has an objective lens of focal length 14 mm and aneyepiece of focal length 20 mm adjusted for minimum
the 24-m reflecting hubble space telescope has been placed intoearth orbit by the space shuttle what angular resolution
the drawing shows two boxes resting on frictionless ramps onebox is relatively light and sits on a steep ramp the other
a 0060 kg tennis ball moving with a speedof 450ms has a head-on collision with a 0090 kg ball initially moving in the
the skateboarder in the drawing starts down the left side of theramp with an initial speed of 647 ms if
a rotational inertia for a driver in a pike position is about 155 kgm2 it is only 80 kgm2 in a tuck positiona if the
what is the strength in air of the electric field at a radialdistance of 070-cm from the middleregion of a 60-m long
when a mass is suspended from a spring the equilibrium length isincreased by 50mm the mass is then given a blow which
a scale sits atop a desk on the scale is a cylindricalcontainer mass 100g filled with 200cm3 200g ofwater a hunk of
suppose 100 g of hydrogen isseparated into electrons and protons suppose also the protons areplaced at the earths north
a molecule of dna deoxyribonucleic acid is 204 microm long the ends of the moleculebecome singly ionized negative on
after a completely inelastic collision between two objects of equalmass each having initial speed v the two move
a parallel plate capacitor holds a charge of 30 nc when attached to a battery of voltage v when a fluid is placed
two protons are brought to a distance of 3x10-14 m from each othera find the magnitude and direction of the force on
a projectile is fired into the air from the top of a 210m cliffits initial velocity is 60 ms at 30 degree above the
a 600-kg runner expends 300 w of power while running a marathon assuming that 100 of the energy is delivered to the
during a workout the football players at state u ran up thestadium stairs in 60 s the stairs are150 m long and inclined
the rectangular loop in the drawing consists of 75 turns andcarries a current of i 41 a a 16-t magnetic field
a projectile is fired at an upword angle of 450 degrees from the top of a 265-m cliff with a speed of 185 ms what will
a 285 kg stunt boat is driven on a surface of a lake at a constantspeed of 135 ms toward a ramp which is angled a 25
water flows at a rate of 25 lmin through a horizontal 70-cm- diameter pipe under a pressure of 60 pa at one point
a 06 kg block of aluminum at 80 celsius and a 0 3 kg block ofcopper at 70 celsius are placed inside 12 liters of water
two laser beams are simultaneously illuminating a diffraction grating one laser has a wavelength of 6328 nm and the
an ideal fuid is moving at 30 ms in a section of a pipe ofradius 020 m if the radius in another section is 035 m what