GuideFoot - Learn Together, Grow Smarter. Logo

Questions in physics

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

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

📝 Answered - Which phrase describes an irregular galaxy? A. has a round shape B. does not have a specific shape C. has arms that extend from the center D. is larger than other types of galaxies

📝 Answered - The potential energy, [tex]$P$[/tex], in a spring is represented using the formula [tex]$P=\frac{1}{2} k x^2$[/tex]. Lupe uses an equivalent equation, which is solved for [tex]$k$[/tex], to determine the answers to her homework. Which equation should she use? [tex]$k=2 P x^2$[/tex] [tex]$k=\frac{1}{2} P x^2$[/tex] [tex]$k=\frac{2 P}{x^2}$[/tex] [tex]$k=\frac{P}{2 x^2}$[/tex]

📝 Answered - Which one of the following accurately describes the universal gravitational law? A. Solid bodies attract other solid bodies, but liquid and gas don't participate in universal gravitation. B. As the distance between any two bodies increases, the gravitational force between them decreases. C. Objects with small masses have more gravitational attraction to each other than objects with large masses. D. Every object that has mass attracts other objects within a million-mile radius.

📝 Answered - Two balls are projected simultaneously, one from the top and the other from the bottom of a building as shown below. The ball does not bounce back after hitting the ground. Find the time after which ball A and ball B collide. ↑ 30 m/s (Ball B from bottom) 20 m (height of building) ↓ 40 m/s (Ball A from top)

📝 Answered - $\begin{array}{l} \stackrel{4 o n c}{(+)} \stackrel{7 o n c}{\rightarrow} \stackrel{7}{\theta} \\ \rightarrow 4.8 N \end{array}$

📝 Answered - Biomass generators produce electricity. They use plant-based fuels such as wood chips and corn husks. The fuel is burned to heat water and create steam. The steam causes turbines to spin. The spinning blades produce electricity. Which sequence of energy transformations is described in the passage? A. Chemical energy -> thermal energy -> mechanical energy B. Thermal energy -> chemical energy -> mechanical energy C. Chemical energy -> mechanical energy -> thermal energy D. Thermal energy -> mechanical energy -> chemical energy

📝 Answered - You are measuring the diameter of a small steel ball using a vernier caliper. The main scale reading just before the 0 of the vernier caliper is 1.2 cm. The [tex]6^{th}[/tex] line on the vernier scale aligns perfectly with a line on the main scale. Calculate the diameter of the steel ball.

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