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1. A radiator with a constant temperature of 150o C has a surface area of 5.00 m2. Calculate its rate of heat loss by radiation to the environment, which is at a constant 20o C. Use the value of 0.98 for emissivity.
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If you pick up a 5.7 kg object from the ground and lift it to a height of 0.98 m above the ground in 1.66 seconds, how much power is expended? (Use the value of 9.8 m/s 2 for the acceleration of gravity.) Please provide ...
Question: Red light of wavelength 633 nm from a helium-neon laser passes through a slit 0.400 mm wide. The diffraction pattern is observed on a screen 3.45 m away. Define the width of a bright fringe as the distance betw ...
Question: The surface charge density on an infinite charged plane is - 1.70 x 10^-6 C/m^2 . A proton is shot straight away from the plane at 2.20 x 10^6m/s. How far does the proton travel before reaching it's turning poi ...
Question: A speed skater moving across frictionless ice at 9.2 m/s hits a 5.0 m wide patch of rough ice. She slows steadily, then continues on at 5.8 m/s. What is her acceleration on the rough ice? The response must be t ...
Question: An object is 40 cm in front of a concave mirror with focal length of 20 cm. what is the postition of the image using ray tracing? The response must be typed, single spaced, must be in times new roman font (size ...
Question: A proton is accelerated from rest through a potential difference V0 and gains a speed v0. If it were accelerated instead through a potential difference of 2V0, it would gain a speed...?
Question: Part A: What is the speed of light in ethyl alcohol (n = 1.36)? Part B: What is the speed of light in lucite (n = 1.50)? Part C: What is the speed of light in crown glass (n = 1.52)? The response must be typed, ...
A 0.900 kg hammer is moving horizontally at 9.50 m/s when it strikes a nail and comes to rest after driving it 1.00 cm into a board. Calculate the duration of the impact. (s) What was the average force exerted on the nai ...
Question: A point charge q1 = 4.00 nC is placed at the origin, and a second point charge q2 = -3.05 nC is placed on the x-axis at x = 21.0 cm. A third point charge q3 = 1.90 nC is to be placed on the x-axis between q1 an ...
Question: A proton moves along the x-axis with vx=1.0 x 10 7 m/s. a) As it passes the origin, what are the strength and direction of the magnetic field at the (1 cm, 0 cm, 0 cm) position? Give your answer using unit vect ...
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