GuideFoot - Learn Together, Grow Smarter. Logo

Questions in physics

📝 Answered - A block sliding along a flat horizontal surface at an initial velocity of 2.0 m/s experiences a constant resistive force of 4.0 N that brings it to rest in a distance of 2.0 m. What is the mass of the block?

📝 Answered - Which formula can be used to express the law of conservation of momentum, where [tex]$p=$[/tex] momentum? A. [tex]$p_i=p_t$[/tex] B. [tex]$p_1\ \textgreater \ p_2$[/tex] C. [tex]$P_i\ \textless \ P_i$[/tex] D. [tex]$p_i \neq p_t$[/tex]

📝 Answered - A particle moves along a straight line relative to a fixed origin $O$ with acceleration, measured in $ft / s ^2$, given by the function $a(t)=20 t-12 t^2$, where $t$ is the time in seconds. If the particle has velocity $v=8 ft / s$ when $t=1 s$, calculate the speed of the particle at the moment $t=2 s$. a $30 ft / s$ b $10 ft / s$ c $12 ft / s$ d $8 ft / s$ e $2 ft / s

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

📝 Answered - Object A attracts object B with a gravitational force of 5 newtons from a given distance. If the distance between the two objects is reduced in half, what will be the changed force of attraction between them? A. 2.5 newtons B. 10 newtons C. 15 newtons D. 20 newtons E. 25 newtons

📝 Answered - Which best describes heat? A. energy that is carried by electric and magnetic fields B. energy that decreases as a car slows to a stop C. energy that increases as a book is lifted to a higher shelf D. energy that flows from a hot mug of tea to a cold hand

📝 Answered - A commonly used pentavalent material is: (a) Boron (b) Arsenic (c) Gallium (d) Neon

📝 Answered - Which one of these is true? (A) Motion is relative (B) Motion is not relative (C) Something is not in motion if its position with respect to the observer changes with time. (D) Both (A) and (B)

📝 Answered - The pressure [tex]$p$[/tex] of an ideal gas of density [tex]$p$[/tex] is given by the equation [tex]$p=\frac{1}{3} p\left(c^2\right)$[/tex] where [tex]$\left\langle c^2\right\rangle$[/tex] is the mean-square-speed (i.e. it is a quantity measured as [speed][tex]$^2$[/tex]?). Use base units to show that the equation is homogeneous.

📝 Answered - Convert the following Fahrenheit degrees to Celsius. 104°F