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Q. A firefighter of mass 115 kg slides down a vertical pole with an acceleration of 4 m/s2. What is the friction force that acts on the firefighter?
Q. Light passes through a 230 lines/mm grating and is observed on a 1.4-{rm m}-wide screen located 1.4 m behind the grating. Three bright fringes are seen on both sides of the central maximum.
Max wavelength and Min wavelength?
A roller coaster is towed up an incline at a steady speed of 0.51m/s by a chain parallel to the surface of the incline. The slope is 2.85 % that means that the elevation increases by 2.85 m for every 100m of horizontal distance.
An ideal gas at 20 C consists of 2.2 X 10^{22} atoms. 4.3 J of thermal energy are removed from the gas. What the new temperature in C.
Water flows through a Venturi meter with a pipe diameter of 10.0 cm and a constriction diameter of 5.6 cm. The U-tube manometer is partially filled with mercury.
Considered frequency and draw the nodal maps
Eight lights are connected in parallel to a 110 V source by two leads of total resistance 2.20. If 240 mA flows through each bulb, what is the resistance of each.
Determine the location at which the tuning is formed and the vibrating frequency of a string to form a standing wave pattern.
compute the tension in the rope if the gymnast slides down the rope with a downward acceleration of magnitude 1.40 m/s^2 .
A certain loudspeaker has a diameter of 45 cm. At what frequency would the wavelength of sound it emits in air be equal to its diameter.
One cubic centimeter of a cumulus contains 250 water drops, which have a typical radius of 10 μm. (a) How many cubic meters of water are in a cylindrical cumulus cloud of height 3.0 km and radius 1.1 km.
An Atwood machine consists of two masses, = 6.5 and = 8.5 , linked by a cord that passes over a pulley free to rotate about a fixed axis. The pulley is a solid cylinder of radius = 0.40 and mass 0.80 .
In adding, the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. Find out the acceleration of the sled and child.
What is modify in frequency ff - fi
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