A 55-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.30, and the coefficient of kinetic friction is 0.20
What horizontal force must be applied to the box to cause it to start sliding along the surface?
160 N
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What causes synchronous rotation?
A) Most jovian moons were formed out of their planet's nebula with the same rotational period as their parent planet. B) Most jovian moons were formed out of their planet's nebula with the same orbital period. C) A massive planet exerts a tidal force on a moon that causes the moon to obtain the same rotational period as its parent planet. D) A massive planet exerts a tidal force on a moon that causes the moon to align itself such that its tidal bulges always point toward and away from the planet. E) orbital resonances with other moons
The figure below shows a planet traveling in a clockwise direction on an elliptical path around a star located at one focus of the ellipse. When the planet is at point A,
a.
its speed is constant.
b.
its speed is increasing.
c.
its speed is decreasing.
d.
its speed is a maximum.
e.
its speed is a minimum.
Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC charge?
A) 34° above +x-axis B) 34° above -x-axis C) along the -x-axis D) 56° above +x-axis E) 56° above -x-axis
The formula mass of acetic acid, HC2H3O2, is ______________ u
Fill in the blank(s) with correct word