In changing from one form to another, energy is always ______________

Fill in the blank(s) with correct word


conserved

Physics & Space Science

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Nichrome wire, often used for heating elements, has resistivity of 1.0 × 10-6 ? ? m at room temperature. What length of No. 30 wire (of diameter 0.250 mm) is needed to wind a resistor that has 50 ohms at room temperature?

A) 3.66 m B) 2.45 m C) 0.61 m D) 6.54 m E) 22.4 m

Physics & Space Science

How much mass does the Sun lose through nuclear fusion per second?

A) 4 tons B) 4 million tons C) 600 tons D) 600 million tons E) Nothing: mass is conserved.

Physics & Space Science

A 17-mm-wide diffraction grating has rulings of 530 lines per millimeter. White light is incident normally on the grating. What is the longest wavelength that forms an intensity maximum in the fifth order?

A) 377 nm B) 352 nm C) 402 nm D) 427 nm E) 452 nm

Physics & Space Science

What is impossible about the following situation? An object in simple harmonic motion has an equilibrium position x = 0.00 m

At some instant in time, the position of the object is +3.00 m, the velocity is -2.00 m/s, and the acceleration is +9.00 m/s2. A) The numerical value of the velocity is smaller than the distance from the equilibrium position, but the numerical value of the magnitude of the acceleration is larger than the distance from equilibrium. B) The velocity is opposite in direction to the displacement. C) The acceleration is greater than the speed. D) The speed is less than the displacement. E) The displacement from equilibrium and the acceleration are in the same direction.

Physics & Space Science