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an astronaut in space cannot use a scale or balance to weigh objects because there is no gravity but she does have
what is the wavelength in meters of photons with the following energies in what region of the electromagnetic spectrum
a car traveling at 55 kmh hits a bridge abutment a passenger in the car moves forward a distance of 69 cm with respect
at a temperature of 27oc and a pressure of 150atm 435ml of a gas was found to have a mass of 0835g find the molar mass
a sample containing 035mol argon gas at a temperature of 13oc and a pressure of 568torr is heated to 52oc and a
a 650-kg person throws a 00410-kg snowball forward with a ground speed of 260 ms a second person with a mass of 550 kg
a sample of hydrogen gas has a volume of 856l at a temperature of 0oc and a pressure of 150atm how many molecules of
a 450-kg girl is standing on a 158-kg plank the plank originally at rest is free to slide on a frozen lake which is a
a 153l sample of a gas is at a pressure of 56 x 103pa if the pressure is changed to 65 mmhg what will be the new volume
a rifle with a weight of 20 n fires a 40-g bullet with a speed of 210 msa find the recoil speed of the riflemsb if a
2ca s o2 g ----gt2cao sdelta h rxn -12698 kj delta s rxn -3646 jk1 calculate the free energy change for the reaction
two 53cm x 53cm metal plates are separated by a 020--thick piece of teflon dielectric constant for teflon is k21 its
a football punter accelerates a football from rest to a speed of 13 ms during the time in which his toe is in contact
if one mole of the following compounds were each placed into separate beakers containing the same amount of water rank
an imperial cruiser fires its lasers at the rebel frigate 12x1030 photons of 505nm wavelength slam into the frigate the
a 1030-kg car is pulling a 285-kg trailer together the car and trailer have an acceleration of 200 ms2 in the positive
for the following reactions identify any acids or bases present and types of acids or bases present a arrhenius bl
while running a person dissipates about 060 j of mechanical energy per step per kilogram of body mass if a 63-kg person
the reaction s2o82- 2 i- ------gt 2 so42- i2 proceeds slowly in aqueous solution but can be catalyzed by the fe3 ion
explain why the membrane potential between the axon hillock and axon either changed or did not change with sub
a person pulls a toboggan for a distance of 378 m along the snow with a rope directed 267 deg above the snow the
sorbic acid hc6h7o2 or hsorb mm 11212 gmol is a weak monoprotic acid with ka 1700 x 10-5 its salt potassium sorbate
there are a growing number of patients with food intake issues choose one of the issues from the list below identify
calculate the force of gravity on a spacecraft 25600 km 4 earth radii above the earths surface if its mass is 1500 kg n
vapor pressure of water at 25 deg c is 24 mmhg and that of pure methanol is 120 mmhg what is the vapor pressure above