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

A. 92.0 m
B. 105 m
C. 134 m
D. 179m
E. 205 m


D. 179m

Physics & Space Science

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The contact angle for a water droplet on polymethyl-methacrylate (PMMA) is 80°. Assume that the surface tension for PMMA is 0.039 N/m. What is the value of the interfacial tension between water and PMMA at 25°C?

What will be an ideal response?

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The electron gun in a television tube accelerates electrons (mass = 9.11 × 10^?31 kg, charge = 1.60 × 10^?19 C) from rest to 3.00 × 10^7 m/s within a distance of 2.00 cm. What electric field is required?

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The position of a mass that is oscillating on a spring is given by x = (12.3 cm) cos[(1.26 s2)t]. What is the acceleration of the mass when t = 0.825 s?

A) 9.89 cm/s2 B) -9.89 cm/s2 C) 10.6 cm/s2 D) -10.6 cm/s2 E) 0 cm/s2

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The alpha emission process results in the daughter nucleus differing in what manner from the parent?

a. Atomic mass increases by one. b. Atomic number decreases by two. c. Atomic number increases by one. d. Atomic mass decreases by two.

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