At a location where g = 9.80 m/s2, a projectile returns to its original height after 4.08 seconds, during which time it travels 76.2 meters horizontally. If air can be neglected, what was the projectile's initial speed?
What will be an ideal response?
27.4 m/s
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This image combines observations made with visible-light and radio telescopes. Which color in the image represents the radio emission?
What will be an ideal response?
A certain photon after being scattered from a free electron at rest moves at an angle of 120° with respect to the incident direction. The wavelength of the incident photon is 0.651 nm
(a.) What is the wavelength of the scattered photon? (b.) What is the energy of the scattered photon?
Entropy: What is the change in entropy when 15.0 g of water at 100°C are turned into steam at 100°C? The latent heat of vaporization of water is 22.6 × 105 J/kg.
A. 90.8 J/K B. -90.8 J/K C. 339 J/K D. -339 J/K E. 0 J/K
Any successful model for the formation of the solar system must explain why the orbits of the planets have low eccentricities
Indicate whether the statement is true or false