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Questions in physics

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

[Done] Which statement describes the appearance of a temperature-vs.-time graph? A. A horizontal line shows that the temperature increases at a constant rate over time. B. A vertical line shows that the temperature decreases at a constant rate over time. C. Horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases. D. Horizontal lines where the temperature increases are connected by upward-sloping lines where the temperature is constant for each phase.

[Done] Select the best answer for the question. 13. What's mass? A. A measure of the amount of matter an object contains B. The force that gravity exerts upon an object C. A measure of an element's attraction for electrons D. The sum of the number of protons and neutrons in an atom

[Done] Select the correct answer. The pressure applied on any object can be calculated by using the following equation: [tex]$P=\frac{F}{A}$[/tex] In the pressure equation, [tex]$P$[/tex] represents the pressure on the object in pascals ([tex]$Pa$[/tex]), [tex]$F$[/tex] represents the force applied on the object in newtons ([tex]$N$[/tex]), and [tex]$A$[/tex] represents the area, in square meters, of the object over which the pressure is applied. What is the pressure applied inside a container having an inner area of 16 square meters over which a force of 1,306 newtons is applied? Note: Answers should be rounded to the nearest whole unit. A. 245 Pa B. 82 Pa C. 163 Pa D. 41 Pa

[Done] The force of gravity between two objects is given by [tex]F_g=\frac{-G m_1 m_2}{r^2}[/tex], where [tex]G[/tex] is the gravitational constant, [tex]m_1[/tex] and [tex]m_2[/tex] are the masses of the objects, and [tex]r[/tex] is the distance between the objects' centers. Find the vertical asymptote of the graph of the function and explain its meaning in context.

[Done] Natural resources are not required for all energy producing technology. Please select the best answer from the choices provided. A. True B. False

[Done] Which unit would you use to measure the temperature of boiling water? A. kelvins B. kilograms C. moles D. amperes

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

[Done] The equation of motion is given for a particle, where [tex]$s$[/tex] is in meters and [tex]$t$[/tex] is in seconds. Find the acceleration after 5.5 seconds. [tex]$s=\sin 2 \pi t$[/tex] Options: [tex]$166.375 \pi^2 M / s ^2$[/tex] [tex]$0 M / s ^2$[/tex] [tex]$30.25 \pi M / S ^2$[/tex] [tex]$-30.25 \pi M / s ^2$[/tex] [tex]$-166.375 \pi^2 M / s ^2$[/tex]

[Done] Highly conditioned athletes experience the anaerobic threshold at what percentage?