Problem based on riffle aiming horizontally
A rifle is aimed horizontally at a target 45m away. The bullet hits the target 1.5cm below the aim point. what is the time takes and the speed?
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Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. (a) How many electrons are there in 3.80 liters of water? (1 liter is equivalent to 1.00 x 10-3 m3) (b) What is the net charge of all these electrons?
What minimum force (assumed constant) is needed from the catapult that is used to help launch the jet? Assume that the catapult and the jet's engine each exert a constant force over the 88.9 m distance used for takeoff.
A 375 mL sample of gas is initially at a pressure of 721 torr and a temperature of 32°C. If this gas is compressed to a volume of 286 mL and the pressure increases to 901 torr, what will be the new temperature of the gas (reported to three sig
At a distance of 4.32 m from a siren, the sound intensity is 3.75 x 10-2 W/m2. Assuming that the siren radiates sound uniformly in all directions, find the total power radiated.
An experiment shows that a 153-mL gas sample has a mass of 0.171 g at a pressure of 761 mm Hg and a temperature of 32oC. What is the molar mass of the gas? R=0.0821 L atm / mol K.
A small, 300 g cart is moving at 1.50 m/s on an air track when it collides with a larger, 2.00 kg cart at rest. After the collision, the small cart recoils at 0.890 m/s. What is the speed of the large cart after the collision?
The kinetic energy of the can andd. the gravitational potential energy of the can-earth system 0.200s before the can reaches the ground?
A second order reaction of type A+B=P in which the reactants were present initially at a concentration of 0.02M is found to be 25% completed in 50minutes, calculate the rate constant and the half life of the reaction .
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