A projectile is thrown horizontally at 11.5 m/s. The projectile hits the ground 0.570 s later. What is the angle of impact the projectile makes with the horizontal ground?
a. –29.1°
b. –25.9°
c. 119°
d. –89.7°
e. –64.1°
b
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Which of the following describes parallax?
A) It is best measured over exactly one year intervals. B) It is inversely proportional to the distance to the star. C) It was first observed by Galileo with his new telescope. D) It is only applicable to objects within the solar system. E) It is more accurate as the distances to objects becomes greater.
Each of us weighs a tiny bit less inside the ground floor of a skyscraper than we do on the ground away from the skyscraper because the
A) gravitational field is shielded inside the building. B) mass of the building above slightly attracts us upward. C) both of these D) neither of these
How can Kirchhoff's Laws be used to deduce something about the nature of the light source?
What will be an ideal response?
The property of objects to resist a change in motion is called
1) friction, 2) velocity, 3) inertia, 4) acceleration, 5) gravity, and it is measured by its 6) speed. 7) velocity. 8) mass. 9) all of these.