Rank them from fastest to slowest in how quickly each warms up: (a) steel, 450 J/kg??C ; (b) aluminum, 910 J/kg??C ; (c) copper, 390 J/kg??C .Rank from fastest to slowest. To rank items as equivalent, overlap them.


Ans: Copper Steel Aluminum

Physics & Space Science

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Projectile Motion: A projectile is thrown upward at 24° with the vertical and returns to the horizontal ground 12.5 s later with no air drag.(a) How fast was it thrown?(b) How far from its original position did it land?(c) How high above its original position did it go?

What will be an ideal response?

Physics & Space Science

A projectile is projected from the origin with a velocity of 30.0 m/s at an angle of 45.0 degrees above the horizontal. What is the velocity and time when the projectile hits the ground?

A. Vx = 21.2 m/s, Vy = -21.2 m/s at t = 4.33 s B. Vx = 16.7 m/s, Vy = -16.7 m/s at t = 3.33 s C. Vx = 21.1 m/s, Vy = -16.7 m/s at t = 2.83 s D. Vx = 16.7 m/s, Vy = -21.2 m/s at t = 4.33 s E. Vx = 21.2 m/s, Vy = -15.0 m/s at t = 3.33 s

Physics & Space Science

Web designers use the CSS ... tags to address image file display instructions for varying screen sizes.

Answer the following statement true (T) or false (F)

Physics & Space Science

What two things are needed to create an emission nebulae?

A) interstellar gas and dust B) hydrogen fusion and helium ionization C) cool stars and much interstellar dust D) hot stars and interstellar gas, particularly hydrogen E) hydrogen gas and carbon dust

Physics & Space Science