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A sled weighing 1.0 X 10^2 N is held in place on a frictionless 20.0 degree slope by a rope attached to a stake at the top. The rope is parallel to the slope. What is the normal force of the slope
A skier leaves the ramp of a ski jump with a velocity of 12.3 m/s, 12.4° above the horizontal. The slope is inclined at 48.6°, and air resistance is negligible. Calculate the distance from t
The mass of an average blueberry is 0.75 g and the mass of an automobile is 1800 kg.Find the number of automobiles whose total mass is the same as 1.0 { mol} blueberries. Express your answer using t
What do you learn about the pH of a solution when its color due to the presence of these two indicators is blue, green and yellow?
A force of 6.55 N acts on a 3.4 kg object for 24.8 seconds. What is the object's change in momentum? Answer in units of N S.
A rifle is aimed horizontally at a target 58 m away. The bullet hits the target 2.0 cm below the aim point. What was the bullet's flight time?
How many kilograms of water would have to be evaporated if this were the only means of heat loss? (The heat of vaporization of water at 35 degree celsius is 2400J/g).
A solid sphere of uniform density starts from rest and rolls without slipping a distance of d = 4 m down a q = 25° incline. The sphere has a mass M = 4 kg and a radius R = 0.28 m. awhat is the t
Assuming ideal frictionless conditions for the apparatus what is the acceleration of the system if m1= .25 kg, m2= .50 kg, and m3= .25 kg?
If 3.25ml of vinegar needs 40.0 of 0.130M NaOh to reach the equivalence point in a titration, how many grams of acetic acid are in a 1.30qt sample of this vinegar?
Derive a formula predicting the percentage an object submerged in water. The formula should be expressed as a ratio in terms of the volume of the block, and the volume of displace water. The result
Using Newton's laws, calculate , the magnitude of the normal force that the floor exerts on the chair.
How many grams of Ca3(PO4)2 (s) (MM = 310.18 g/mol) are obtained when 25ml of 0.185 M Na3PO4 are mixed with 34ml of 0.140 M Ca(NO3)2.
A 3 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 2.2 m/s2, find the force exerted by the rope on the bucket of water.
What mass of barium sulfate is produced when 100.0 mL of a 0.100 M solution of barium chloride is mixed with 100.0 mL of a 0.100 M solution of iron(III) sulfate?
What is the heat of reaction, ΔH, in kJ at 25°C for the above reaction, given the following bond energies (kJ/mol) at 25°C?
Calculate the concentrations of all species in a 1.66 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1=1.4x10^-2 and Ka2=6.3x10^-8.
Two horizontal forces, 244 N and 161 N, are exerted on a canoe. If the these forces are applied in the same directions, find the net horizontal force on the canoe?
A gorilla weighs 8.00x10^2N and swings from vine to vine. As the gorilla grads a new vine, both vines make an angle of 30 degrees with the verticle. In such a condition of static equillibrium what
A certain substance, initially present at 0.950 M, decomposes by first-order kinetics with a rate constant of 1.25 × 10-2 mol L-1s-1. Calculate the time (in seconds) required for the system to
How does the acid-base nature of the oxides of the elements in Period 3 change with increasing atomic number ' to the change in structure and bonding that takes place along the period?
If the minimum (threshold) energy for the emission of an electron from the surface of a particular metal is 2.51 X 10-19 J, what is the kinetic energy of an electron emitted from the surface of the
Calculate total and individual w, q, ΔU, ΔH, and ΔS of an Otto engine operating on stoichiometric ethanol - oxygen gas mixture, with cylinder volume of 1.
What would happen to the olubility of potassium chloride in the water as the water temprature increased from 25 degrees celsius to 75 degrees celsius?
Sam is using a rope to pull a box weighing 300 N across a floor with constant velocity. The rope makes an angle of 300 above the horizontal. If the tension in the rope is 100 N what is the normal f