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A 5 kg block, measuring 10 cm per side, is held 50% submerged in water by a helium balloon. If the density of air is 1.18 g/L, helium is 0.164 g/L, and water is 1000 g/L, what is the diameter of the balloon?
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons, How many electrons are there in 1.79 liters of water
What is its initial velocity as it leaves the ground. Two particles are fixed on an x axis.
select the quantity that has changed(velocity or speed) for a car that travels north at 88 km/h and then turns east while continuing to move at 88 km/h. define your answer.
A 1600 kg car starts from rest at A, coasts 180m through a dip and comes to stop at B after coasting a distance d on level ground. If the rolling resistance is a constant force of 280N, conclude the distance d.
In a photoelectric effect experiment, visible radiation of energy 2.91 eV is incident upon a metal of work function 1.66 eV. find the maximum kinetic energy of the ejected photoelectrons
If the coefficient of friction between the ladder and ground is 0.42, illustrate what is the mass of the heaviest person who can safely ascend to the top of the ladder?
Two automobiles drive in the same direction next to the highway. Each moves initially at speed v = 30 meters per second, (that's 67.11 miles per hour) and the distance between them is D meters.
If you put a 0.28 kg mass 15 cm from the axis of a massless disk, and you apply a 0.4 N force on a string wrapped at the disk's edge, what is the resulting angular acceleration
What is the wavelength of the electromagnetic waves used for cell phone communications in the 900-MHz band?
For a particular collision you detect the emitted products and find 15 protons, 2 antiprotons, 6 positrons, and 25 neutral particles. How many electrons are also emitted?
The occupant of a small vechical hears a frequency of 1.5x10^3 Hz emitted from a stationary space buoy, What is the speed of sound on the planet
Two point charges are fixed to rectangular coordinate system, Charges of q1 = 3.5uC and q2 = -15 uChave coordinates (0.55,0) and (0,0) in meters respectively
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