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An artillery shell is fired with an initial velocity of 300 m/s at 57.5° above the horizontal. To clear an avalanche, it explodes on a mountainside 38.5 s after firing. What are the x and y comp
The water level in the CO2 collection cylinder is higher than the water level outside the cylinder. Is the wet CO2 gas pressure greater or less than atmospheric pressure?
What is the rms speed of nitrogen molecules contained in an 6.9 m3 volume at 2.0 atm if the total amount of nitrogen is 1000 mol?
An electric motor rotating a workshop grinding wheel at a rate of 96 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 1.70 rad/s2.
Three 1.2 kg masses are located at the vertices of an equilateral triangle 88 rm cm on a side, connected by rods of negligible mass. Find the rotational inertia of this object (a) about an axis thro
An Olympic skier moving at 20 m/s down a 30o slope encounters a region of wet snow and slides 145 m before coming to a stop. What is the coefficient of friction between the skis and the snow if the
What is the volume occupied by 28.2g of argon gas at a pressure of 1.06atm and a temperature of 360K ?
Two trains heading toward each other on the same track are initially separated by 1000 km. One train is heading east at 20 m/s and the other is heading west at 30 m/s. When and where will the trains
A desktop computer is to be cooled by a fan whose flow rate is 0.34 m3/min. i) Determine the mass flow rate of air through the fan at an elevation of 3400 m where the air density is 0.7 kg/m3.
Two boxes (m2 is higher up the ramp than m1) m1=1.0kg with a coefficient of knietic friction of 1.0, and m2= 2.okg with a coefficient of kinetic friction of 2.0 are placed on a plane of 30 degrees.
Find the work she does on the flight bag. Find the work done by the force of friction on the flight bag. Find the coefficient of kinetic friction between the flight bag and the floor.
Why does energy gap decreases in each shell as it is further away from the nucleus? Shouldn't they all have the same electron repulsion?
An experiment shows that a 115mL gas sample has a mass of 0.170g at a pressure of 711mmHg and a temperature of 34C. What is the molar mass of the gas?
What is the magnitude of the apparent weight of a 70 astronaut 3600 from the center of the Earth's Moon in a space vehicle moving at constant velocity?
Calculate the frictional force on a 3000kg car rounding a 6m-radius curve at a speed of 35m/s
Given the data below, analyze the outcome of a polymerization in each solvent -- conclude by explaining which solvent you would choose and why.
The blocks stick together after the collision. Find the magnitude of the total initial momentum of the two-block system. Find, the magnitude of the final velocity of the two-block system. What is th
Calculate the amount of heat required to heat a 3.9kg gold bar from 30°C to 66°C. Specific heat capacity of gold is 0.128 J/g°
If the transmitted intensity varies by a factor of 4.50 during the rotation, what fraction of the intensity of the original beam is associated with the beam's polarized light?
A 4.00-kg model rocket is launched, expelling 49.0 g of burned fuel from its exhaust at a speed of 555 m/s. What is the velocity of the rocket after the fuel has burned?
A solution is prepared from 0.95g of Phosphoric acid and 1.15 g of perchloric acid in 150 ml of solution. How many milliliters of 0.425 M NaOH is required to neutralize 110 ml of this acidic soluti
A place kicker must kick a football from a pint 35m from the goal. as a result , the ball must clear the crossbar, which is 3.05m high. when kicked, the ball leaves the ground with a speed of 20 m/s
One spot on your plate traveled 4.3 cm when the solvent traveled 5.9 cm. What is the value of Rf for this spot?
What is the average current generated in the Cu(s)| Cu2+(aq)|| Fe3+(aq)| Fe(s) electrochemical cell if 50 g of Cu(s) are used up in a 24 hour period?