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The intensity of light from a lightbulb is 12 W/m2 at a distance of 0.45 m from the bulb. What is the intensity across the room at a distance of 2.5 m?
A hanging magnesium wire with diameter0.13 cm is initially 2.0 m long. When a 28kg mass is hung from it, the wire stretches an amount 1.03 cm. A mole of magnesium has a mass of 24 grams, and its density is 1.74 g/cm3.
A 100 g ice cube having an initial temperature of 0oC is put into an insulated cup containing 200 g of water. After a long time, all the ice is melted and the remaining water is at 0oC. Assuming no heat flows into or out of the cup, what was the ..
A diver 32.0 m deep in 8.00 °C fresh water exhales a 1 cm diameter bubble. What is the bubble's diameter just as it reaches the surface of the lake, where water temperature is 25°C? Hint: suppose the air bubble is always in thermal equilibrium wit..
The electric field E = (5.7, 2.7, 8.1) N/C passes through a square surface whose area vector is A = (1.7, -3.4, 0.55) m2. Compute what is the electric flux through the surface
question1consider mass and a frictionless ramp. the mass is pushednbspupward with some initial velocity. since of
A thin cylindrical rod with l = 24.0cm with m = 1.20kghas a ball of diameter d = 8.00cm with mass M = 2.00kg attached to one end. The arrangement is initially vertical and stationary, with the ball at the top. The combination in free to pivot regardi..
The solid fuel of a 300.kg rocket travelling at 1.64x10^4 km/h is ignited to correct the rocket trajectory in mid-flight to Mars. what is the acceleration of the rocket (in m/s^2) at the start of this burn
A light source of original intensity I0 passes through two coaxial circular polarizers. What is the average intensity of the light passing through both polarizers
A house at the bottom of a hill is fed by a full tank of water = 6.50 deep and connected to the house by a pipe that is = 130 long at an angle of = 61.0 from the horizontal. Find out the water gauge pressure at the house.
When point charges q1=+8.4uC and q2 = +5.6uC are brought near each other , each experience a repulsive force of magnitude 0.66 N. Determine the distance between the charges.
A force acts along the displacement of the asteroid and slows it down. The asteroid has a mass of 3.7 × 104 kg, and the force causes its speed to change from 7600 to 5500 m/s. What is the work done by the force
The specific weight of a fluid is 11 200 N=m3. Calculate the mass contained in 2 m3 - Using the standard gravity.
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