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Use Newton's laws to explain why you seem to be thrown forward as the car stops. Is there really a force pushing you forward?
A series circuit consists of an ac source of variable frequency, a 115- Ω resistor, a 1.25-µF capacitor, and a 4.50-mH inductor. Find the impedance of this circuit wben the angular
Based on the Body Fat Versus Weight data set, which variable is the predictor variable? Which variable is the response variable? Explain.
Find the magnitude and direction (relative to forward direction) of the resultant force that these engines exert on the rocket.
What is the distance between the two aircrafts? (Place the x-axis west, the y-axis south, and the z-axis vertical)
While exploring a cave, a spelunker starts at the entrance and move the lowing distances. She goes 75.0m north, 250m east, 125m at an angle 30o north of east, and 150m south. Find her resultant disp
You and your friend Peter are putting new shingles on a roof pitched at 25^\circ . You're sitting on the very top of the roof when Peter, who is at the edge of the roof directly below you, 5.2 m awa
A system at equilibrium contains I2(g) at a pressure of 0.36 atm and I(g) at a pressure of 0.30 atm. The system is then compressed to half its volume. Find the pressure of I2 when the system returns
Draw a rectangle that gives a visual representation of the problem. Use the specified variables to label the sides of the rectangle.
Suppose a wire is stretched tightly around the Earth. (The radius of the Earth is approx. 6,400 km.) If the wire is cut, its circumference is increased by 20 meters, and the wire is placed back arou
When resistence of 2 ohm is connected across the terminals of a cell the current is 0.5 ampere when resistence is increased to 5 ohm the current is 0.25 ampere what is the potential difference of th
Each of the smaller mirror parts is itself a hexagon with sidelength 0.5 meter. What is the apothem of one of the smaller mirrors?
Two substances, A and B, have identical enthalpies of vaporization. They boil at 164 degree celsius and 236 degree celsius, respectively. If the entropy of vaporization of A is 87.2 J/K, what is the
Assume that a 6 volt energy source is in a circuit that has a resistance of 10 ohms. Determine the current and power. Provide numerical values and units.
A 1100 kg car is moving at a speed of 40.0 m/s. (a) What is kinetic energy of the car? (b) How much work is required to bring the car to rest? (c) Determine the stopping distance if the brakes suppl
The Henry's law constant (KH) for carbon monoxide, CO, in water at 25oC is 9.71x10^-4 mol/L.atm . How many grams of CO will dissolve in 1.00 L of water if the partial pressure of CO is 2.75 atm ?
Calculate the wavelength of the emitted photon when an electron drops between the N = 4 and N = 3 energy levels in a hydrogen atom.
A metal surface illuminated by 8.5x1014Hz light emits electrons whose maximum energy is 0.52eV. The same surface illuminated by 12.0x1014Hz hight emits electrons whose maximum energy is 1.97eV. From
The spectrum of mercury contains a line at 435.8 nm in the blue region of visible light. What is the difference in energy levels in the atom that gives rise to this spectral line? Give the answer in
Assume you are carrying out the conversion of 1-bromobutane to 1-butane. How could you use Infrared Spectroscopy (IR) to determine when the reaction is complete?
For the reaction given below, the frequency factor A is 8.7 X 10^12 s-1 and the activation energy is 63 kJ/mol. What is the rate constant for the reaction at 65°C?
A person of weight 80 kg jumped off a platform of height 1 m and safely landed on his feet. What is the magnitude of the momentum change during the collision. Give in SI units.
You suspect that an unknown is acetanilide (mp 113.5-114oC). Give a qualitative estimation of the melting point when the acetanilide is mixed with 10% by weight of naphthalene.
A person of weight 80 kg jumped off a platform of height 1 m, bounced off and ended up on the same platform. What is the magnitude of the momentum change during the collision, in SI units?