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A helicopter propeller blade starts from rest and experiences a constant angular acceleration of 10.5 rad/s2. Find the speed of a point on the blade 5.35 m from the axis of rotation when the blade h
Suppose that the coefficient of friction between your feet and the floor, while wearing socks, is 0.250. Knowing this, you decide to get a running start and then slide across the floor.
Suppose we start with 0.300 mol of N2O5(g) in a .500L container. How many minutes will it take for the quantity of N2O5 to drop to .030 moles?
An object with a height of 10 cm is reflected from a mirror. The image reflected from the mirora is INVERTED and has a height of 5 cm . What is the magnification of the mirror?
What is the force of attraction between the two, if the separation is the Bohr radius? Give answer in nN (nanoNewtons), 2 significant digits. Make sure you use the Coulomb law written in SI units
The speed of light in a vacuum is 3*10^8 m/s . The speed of light whitin a particular substance is 1.5 * 10^8 m/s. The index of reflaction of the substance is:
Compute the momentum of a water molecule at normal conditions, assuming its kinetic energy (mv2 /2) is equal to (3kB T/2).
A uniform rod of length 200cm is bent at its midpoint into a right angle. Then the bent rod is placed along the negative x and positive y axes, with the bent point located at the origin. What is the
How much work is needed to lift a water molecule by 15 km? Pretend that the gravity force is the same throughout. Give answer in Joules, 2 significant digits.
You have just made a solution by combining 50 mL of a 0.1 M sodium acetate solution with 150 mL of 1 M acetic acid (pKa = 4.7). What is the pH of the resulting solution?
An object is initially moving with a speed of 10.0 m/s in the direction 60.0 degrees N of E. Ten seconds later, the object is moving with a speed of 20.0 m/s in the direction 30.0 degrees S of E. W
An electron with a speed of 2.0 X 106 m/s moves into a uniform electric field of 500 N/C that is parallel to the electron's motion. How long does it take to bring the electron to rest?
A railroad car of mass 2.50 104 kg moving at 2.00 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 1.20 m/s. What
How many mL of an ethanol-water solution prepared by dissolving 15.0 cm3 of ethanol (density= 0.789 g cm-3) in sufficient water to produce 120.0 cm3 of solution
A block of mass 2 kg travels along a horizontal frictionless surface with velocity 3 m/s. The mass collides with another mass, m, and rebounds with velocity -1 m/s. What impulse was delivered to mas
The lemon juice(analyte) before the end point was reached. Estimate the analyte concentration, assuming that the acid in the lemon juice is monoprotic.
A 1/2 kg ball is dropped from rest at a point 5m above the floor, and bounces back with a speed of 6 m/s. What impulse is applied on the ball during the collision with the floor?
Use a stock titrant concentration of 0.1000mol/L NaOH, determine the NaOH concentrations prepared using the following dilutions.
A simple Atwood's machine uses two masses, m1 and m2. Starting from rest, the speed of the two masses is 9.0 m/s at the end of 3.0 s.
In the old definition of standard state, STP corresponded to conditions of "standard" temperature (T=0°C) and standard pressure (p= 1 atm).
The outside mirror on the passenger side of a car is convex and has a focal length of -7.7 m. Relative to this mirror, a truck traveling in the rear has an object distance of 15 m. Find the magnific
If the gas is at room temperature, what volume would the gas occupy if it was released in the room? Assume normal barometric pressure.
A hydrogen atom that has lost its electron is moving ( in the + Y direction ) in a region where the magnetic field is directed from (-Z) to (+Z). What direction will the atom be deflected?
A car is coasting at 20 meters/sec at the top of a 100 meter high hill. The car rolls down the hill. How fast is the car traveling when it reaches the bottom? There is no friction and the car's engi
Write the chemical equation for all the reactions both SN1 and SN2 involving primary and secondary substrates. Rank the primary halide in order of increasing reactivity toward SN2.