What are two advantages of large scopes over smaller ones?
A) Large scopes have a larger field of view and sharper focus.
B) Large scopes are not subject to atmospheric turbulence and opacity like smaller ones.
C) Large scopes are easier to mount and control than small ones.
D) Large telescope have more light grasp and better resolution.
E) Large telescopes give higher magnification and are easier to build.
D
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A force of 7.2 N acting on a 1.0-kg object initially at rest moves it through a parallel distance of 2.5 m. Neglecting friction, what is the speed of the object when it is moved 2.5 m?
It is possible to view the Moon in first-quarter phase the day after a total lunar eclipse
Indicate whether the statement is true or false
The horizontal acceleration of a projectile
a. is zero. b. stays constant. c. continuously increases. d. continuously decreases. e. sometimes decreases and sometimes increases.
A steel wire, 86.0 m long at 21°C, has a coefficient of linear expansion of 11 × 10^?6/C°. Give its change in length as the temperature changes from 21°C to 36°C
a. 2.0 cm b. 3.4 cm c. 1.4 cm d. 0.21 cm e. 6.3 cm