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During a cold winter day, wind at 55 km/h (assuming heat transfer coefficient h = 32.8 W/m2C) is blowing parallel to a 4-m-high and 10-m-long wall of a house. If the air outside is at 5 C and the su
Liquid helium has a temperature of only 4.24 K and is in equilibrium with its vapor at atmospheric pressure. Calculate the rms speed of a helium atom in the vapor at this temperature.
(a) Determine the speed of the traveling wave. m/s (b) Determine the wavelength of the traveling wave. m (c) Determine the frequency of the traveling waves that make up the standing wave.
The two rods are placed in series, 0 C to 100 C. L= 1.05m, half lead and half copper. Find (a) the temperature at the lead-copper-junction, and (b) the amount of heat that flows through the rods in
When the car is stationary, its horn emits a sound whose frequency is 9.90 102 Hz. The speed of sound is 343 m/s. What is the acceleration of the car?
Two metal rods are to be used to conduct heat from a region at 100 C to a region at 0 C. The rods can be placed in parallel or in series. Is the heat conducted in the parallel arrangement (a) great
A 20-ft long non-uniform rod rest with its two ends on scales. When a 120-lb person stands at the geometric center of the rod, the left scale reads 220 lbs and the right end reads 300 lbs. Determine
Three particles of masses: m1 = 2 kg, m2 = 3 kg and m3 = 5 kg, are fixed at the points (4 m, 0 m), (9 m, 5 m) and (7 m, 5 m), respectively, in the xy plane. An axis A is perpendicular to the xy plan
A glass window pane has an area of 3.00 m and a thickness of 0.600 cm. If the temperature difference between its faces is 25.0°C, what is the rate of energy transfer by conduction through the w
The magnitude of F is 384 newtons and its points at 344 degrees measured counterclockwise from the positive x-axis. What is the x component in newtons of F?
if the aircrafts initial speed when rolled onto the runway was 10m/s and it accelerates at 20 seconds before it leaves the ground what is the magnitude of the aircrafts average acceleraion during ta
A cannonball is shot (from ground level) with an initial horizontal velocity of 36.0 m/s and an initial vertical velocity of 21.0 m/s. What is the speed of the cannonball 2.7 seconds after it was sh
What is the change in electric potential energy of a charge q = 9.3 oC if it is moved from (x, y) = (20 cm, 45 cm) to (5 cm, 30 cm)?
It is 8 {\rm ft} long and has a diameter of 4 \rm in. Determine the maximum shear stress in the shaft caused by torsion.
Estimate the magnitude of the electric field due to the proton in a hydrogen atom at a distance of 5.29 * 10^-11 m, the expected position of the electron in the atom.
Let C= (3.10m, 15 degrees above the x-axis) and D= (23.3m, 44 degrees to the right of the negative y-axis). Find the magnitude of C and D. Find the x-components and the y-components of C and D. Ple
Find the charge separation distance in an electric field of 7.87 × 105 N/C. What is the magnitude of the induced electric dipole moment then?
The angle between the vertical and the paths of the drops appears to be 45°. If the train were stopped, at what angle and with what velocity would the drops be observed to fall?
The spherical shell carries charge with a uniform density of -2.35 µC/m3. A proton moves in a circular orbit just outside the spherical shell. Calculate the speed of the proton.
A spherical shell with an inner radius of 10 cm and outer radius of 12 cm contains a net charge +10uc. At the center of the shell is located a point charge with a charge of +2uc. What is the strengt
Two point charges are separated by a distance of 1.5 c.m., and have charges of +2.0 Micro C and +4.0 Micro C, respectively. A proton is placed in the middle between the two charges. What is the magn
A plate capacitor has a spacing between its plates of 5mm and a potential difference of 3.00e3 Volts across its plate. How fast is the electrom traveling when it reaches the positive plate. Ignore
What happens to the solutions of the time-independent Schrodinger equation if the potential energy V (x) is changed by an additive constant C everywhere? What happens to the energies?
An electron moves on a path parallel to the direction of a uniform electric field of strength 5 N/C. How much work is expended on moving the electron 15 c.m. in the same direction as the electric f
After a reaction time 0.800 s the policeman begins to pursue the speeder with an acceleration of 4.00 m/s^2. Including the reaction time, how long does it take for the police car to catch up with th