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Questions in physics

📝 Answered - Select the correct answer. Roger pushes a box on a $30^{\circ}$ incline. If he applies a force of 60 newtons parallel to the incline and displaces the box 10 meters along the incline, how much work will he do on the box? A. $5.2 \times 10^2$ joules B. $6.0 \times 10^2$ joules C. $-5.2 \times 10^2$ joules D. $-6.0 \times 10^2$ joules

📝 Answered - An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

📝 Answered - The voltage of a generator is 220V. If approximately 8V are lost in a supply line, what is the rate of voltage lost?

📝 Answered - Is it possible to determine the density of extrasolar planets? True False

📝 Answered - Select the correct answer. In which situation is no work being done? A. a person carrying a box from one place to another B. a person picking up a box from the ground C. a person pushing a box from one place to another D. a person pulling a box from one place to another

📝 Answered - Asteroids can also have moons. True or False?

📝 Answered - A liquid that occupies a volume of 4.7 L has a mass of 5.1 kg. What is the density of the liquid in [tex]$kg / L$[/tex]? density = [ ? ] kg/L. Round your answer to the tenths place.

📝 Answered - An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

📝 Answered - The acceleration of an object (in [tex]$m / s ^2$[/tex]) is given by the function [tex]$a(t)=3 inos(t)$[/tex]. The initial velocity of the object is [tex]$v(0)=-2 m / s$[/tex]. Round your answers to four decimal places. a) Find an equation [tex]$v(t)$[/tex] for the object velocity. [tex]$v(t)= \square$[/tex] b) Find the object's displacement (in meters) from time 0 to time 3. [tex]$\square$[/tex] meters c) Find the total distance traveled by the object from time 0 to time 3. [tex]$\square$[/tex] meters

📝 Answered - Select all of the statements below that are correct. Capacitors store capacitance. Capacitors store energy. Capacitors store electric charge. Capacitors obey Ohm's law.