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a student places her 350 g physics book on a frictionless table she pushes the book against a spring compressing the
the carbon dioxide will be generated by reacting solid sodium bicarbonate nahco3 with a solution of acetic acid ch3cooh
consider a rocket which has two combustion rates 1 4 kgs and 2 8 kgs the relative speed of the exhaust gas is 90 ms
a 50 kg skateboarder wants to just make it to the upper edge of a quarter pipe a track that is one-quarter of a circle
in an experiment temperature of hydrochloric acid hcl1020m solution is 234 degrees celcius the temperature of sodium
one billiard ball is shot east at 30 ms a second identical billiard ball is shot west at 10 ms the balls have a
when liquid water at 0degc and 1 atm is converted to ice at 0degc and 1 atm 601 kj mol-1 of energy is released as heat
you are the technical consultant for an action-adventure film in which a stunt calls for the hero to drop off a 233-m
a thin uniform rod length 109 m mass 309 kg is pivoted about a horizontal frictionless pin through one of its ends
what mass of magnesium in reaction with an excess of hydrochloric acid is needed to produce 128 ml of hydrogen h2 gas
a small circular object with mass m and radius r has a moment of inertia given by i cmr2 the object rolls without
a man is lifting a 50kg rock this weelbarrow is the first kind of lever and the middle of the wheel is the fulcrum the
the world burns approximately 90x102 kg of fossil fuel per year use the combustion of octane as the representative
a house at the bottom of a hill is fed by a full tank 50m deep and is connected to the house by a 110m long pipe at an
river pascal with a volume flow rate of 70times105 ls joins with river archimedes which carries 107times106 ls to form
calculate the heat capacity of a calorimeter if the combustion of 4660 g of benzoic acid led to an increase in
a 10-cm-diameter pipe widens to 20 cm then narrows to 05 cm liquid flows through the first segment at a speed of 40
a fuel gas containing 86 methane 8 ethane and 6 propane by volume flows to a furnace at a rate of 1450 m3 h at 15
a group of students are camping in the middle of the forest on a very dark night their torch batteries went flat hours
make a schematic diagram of a cell for each of the following cell reactions indicate on the diagram the anode the
water flowing through a 29 cm-diameter pipe can fill a 300l bathtub in 36 minwhat is the speed of the water in the
succinic acid an intermediate in the metabolism of food molecules has molecular mass 1811 amu when 1926 g of succinic
a truck horn emits a sound with a frequency of 246 hz the truck is moving on a straight road with a constant speed if a
what is the velocity of a hydrogen molecule after absorbing a photon 584 nm what is the translational energy of the
1 a pendulum consists of a mass m 0080 kg hanging from a flexible string of length l the string is very thin very