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A slab of a thermal insulator with a cross-sectional area of 110{\rm cm^2} is 2.90{\rm cm} thick.
Part A Its thermal conductivity is 7.50×10?2 {\rm W/(m \K)} ; If the temperature difference between opposite faces is 78.5^\circ C, how much heat flows through the slab in 1 day?
The coefficient of friction between the ladder and ground is 0.6 and the ladder makes an angle, theta with the ground equal to 50 degrees. Explain how far up the ladder can an 800N man climb before the ladder begins to slip?
A pipe is open at both ends. Its length is 22.81 cm. If I excite standing waves in the pipe by blowing air over one of its ends, Find the distance between the antinodes at the two ends of the pipe
A 150g ball and a 250g ball are connected by a 34cm long, massless, rigid rod. The balls rotate about their center of mass at 130 . what is the speed of ball of 150 g.
A helium balloon ride lifts up passengers in a basket. Assume the density of air is 1.28 kg/m3, find the volume of helium in the balloon when fully inflated
A diverging lens (f = -12 cm) is located 20.0 cm to the left of a converging lens (f = 34.5 cm). A 3.00 cm tall object stands to the left of the diverging lens, exactly at its focal point.
One of the 57.5cm -long strings of an ordinary guitar is tuned to produce the note B3(frequency 245 Hz) when vibrating in its fundamental mode. Find the speed of transverse waves on this string
An athlete on a trampoline leaps straight up into the air with an initial speed of 5.1 m/s, find the speed of the athlete when she is halfway up to her maximum height
Under the assumption that the actual acceleration is constant determine the number of times that the wheel rotates in the interval from the initial time to the final time.
A point charge with charge q1 = 2.00?C is held stationary at the origin, How much work W is done by the electric force on the moving point charge
The armature windings of a dc motor have a resistance of7.5? . The motor is connected to a 120-V line, What will be the current in the motor
How far above the base of the cliff does this happen. What is an acceleration at the point where the block begins to slip.
A light ray in air is incident on a transparent material whose index of refraction is n, Evaluate your expression for light incident on glass
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