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 - Use this table of a school bus during morning pickups to calculate its average speed between 0 h and 2.340 h. | Position (km) | Time (h) | |---------------|----------| | 0.0 | 0.000 | | 1.2 | 0.024 | | 2.8 | 0.051 | | 4.2 | 0.084 | | 16.3 | 2.340 |

📝 Answered - Complete the Nuclear Decay Table: | Decay Type | Mass of particle | Charge of particle | Symbol | |---|---|---|---| | ? | | +2 | He | | Beta | 0 | | | | | 0 | | by | | Positron Emission | | +1 | | Gamma Alpha Electron

📝 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 - The function [tex]$s=f(t)$[/tex] gives the position of an object moving along the [tex]$s$[/tex]-axis as a function of time [tex]$t$[/tex]. Graph [tex]$f$[/tex] together with the velocity function [tex]$v(t)=\frac{d s}{d t}=f(t)$[/tex] and the acceleration function [tex]$a(t)=\frac{d^2 s}{d^2}=t^{\prime \prime}(t)$[/tex], then complete parts (a) through (f). [tex]$s=104 t-16 t^2, 0 \leq t \leq 6.5$[/tex] (a heavy object fired straight up from Earth's surface at [tex]$104 f / sec$[/tex]) A. The object is moving down for [tex]$t$[/tex] in the interval ______ but is never moving up. B. The object is moving down for [tex]$t$[/tex] in the interval ([tex]$3.25,6.5$[/tex]] and the object is moving up for [tex]$t$[/tex] in the interval [[tex]$0,3.25$[/tex]) C. The object is never moving down, but is moving up for [tex]$t$[/tex] in the interval ______. D. The object is never moving down or up. c. When does the object change direction? Select the correct answer below, and if necessary, fill in the answer box to complete your choice. A. The object changes direction at [tex]$t =3.25 sec$[/tex]. (Type an integer or a decimal. Use a comma to separate answers as needed.) B. The object never changes direction. d. When does the object speed up and slow down? Select the correct answer below, and if necessary, till in the answer box(es) to complete your choice. (Simplify your answer. Type your answer in interval notation. Use integers or decimals for any numbers in the expression) A. The object never speeds up, but slows down for [tex]$t$[/tex] in the interval ______. B. The object speeds up for [tex]$t$[/tex] in the interval ([tex]$3.25,6.5$[/tex]) and the object slows down for [tex]$t$[/tex] in the intervat ([tex]$0,3.25$[/tex]) C. The object speeds up for [tex]$t$[/tex] in the interval ______ but never slows down. D. The object never speeds up or slows down. e. When is the object moving fastest (highest speed)? Stowest? Select the correct answer below and till in any answer boxes to complete your choice. A. The object is moving fastest at [tex]$t =$[/tex] ______ when the speed is ______ fi/sec. The object is moving slowest at [tex]$t =$[/tex] ______ when the speed is ______ [tex]$n / sec$[/tex] (Type an integer or a decimal. Use a comma to separate answers as needed.) B. The object is moving at a constant speed of ______ [tex]$fl / sec$[/tex]

📝 Answered - Parker wound a wire around a large iron nail. He then created an electromagnet by connecting the ends of the wire to different batteries. The table shows the current he measured for each electromagnet. Which conclusion is best supported by the data? A. Electromagnet W is the strongest. B. Electromagnet X is weaker than electromagnet Z. C. Electromagnet Y is the strongest. D. Electromagnet Y is weaker than electromagnet X.

📝 Answered - How much work is required to lift an object with a mass of 5.0 kilograms to a height of 3.5 meters? A. 17 joules B. $17 \times 10^?$ joules C. $1.9 \times 10^2$ joules D. $1.8 \times 10^2$ joules

📝 Answered - What is the strength of the electric field 0.020 m from a $12 \mu C$ charge? (Use $k =8.99 \times 10^{\circ} N \frac{ m ^2}{ c ^2}$)

📝 Answered - What should you avoid wearing when using a ladder? A. Closed-toe shoes B. Gloves C. A hard hat with a chin strap D. Baggy clothing or long accessories