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# A cable used to lift heavy materials like steel I-beams must be strong

Question A cable used to lift heavy materials like steel I-beams must be strong enough to resist breaking even under a load of 2.3 106 N. For safety, the cable must support twice that load.(a) What cross-sectional area should the cable have if it’s to be made of steel? m2(b) By how much will a 7.0-m length of this cable stretch when subject to the 2.3 106-N load? m

## Jake, a survivor of the devastation imposed by Harvey when it hit

Question Jake, a survivor of the devastation imposed by Harvey when it hit Rockport, Texas, witnessed his friends being severely injured or killed when the hurricane struc He is now suffering from PTSD Jake was not much of drinker before the hurricane devastated his home and took his friends lives, but now, he frequently drinks alone nightTo what might this be related?

## Get Answer You must use simulation site, https://phet.colorado.edu/en/simulation/legacy/collision-lab (a) Describe your observations using Newton’s law of universal gravitation? (b)When

Question Get Answer You must use simulation site, https://phet.colorado.edu/en/simulation/legacy/collision-lab (a) Describe your observations using Newton’s law of universal gravitation? (b)When you double the mass of the star, How does that affect the gravitational force? (c) Click on the path and then run the simulation and observe. How does the gravitational force changes when the Earth rotates around the Sun, Explain your observations.(d) Double the mass of the Earth. How does that affect the gravitational force? (e) Turn the path on and then run the simulation and observe how the gravitational force changes when the Earth rotates around the Sun. Explain your observation. Reset the simulation! This time we will focus on velocity. Turn the velocity and the gravitational force on and run the simulation. (a) Explain why the gravitational force and velocity vectors are perpendicular to each other?(b) Double the mass of the Sun and explain what happens to the magnitude of the velocity vector as the Earth rotates around the Sun.(c) Reset the mass of the star to our Sun and double the mass of the planet. How does this affect the magnitude of the velocity vector?

## a) I need help with a Physic question, PhotonicsAn argon laser has a cavity length of 1 meter. Find

Question a)
I need help with a Physic question, Photonics

An argon laser has a cavity length of 1 meter. Find the longitudinal mode spacing ?(assume n = 1).b) (a) Draw the physic model of an neutral atoms consists of fiveelectrons.(b) Why the electron’s energy in an atom is quantized?(c) Explain the physic significance of the Stern-GerlachExperiment.c)d)please type and explain properly with diagram where needed

## describe the bony attachments of each of the muscles (noting each

Question describe the bony attachments of each of the muscles (noting each muscle separately), describe the action(s) of the muscle/muscle group if they all contribute to similar actions and note if they muscle is the primary muscle for any specific actions. Sartorius muscle:Rectus Femoris muscle:Vastus Lateralis muscle:Vastus Medialis muscle: Vastus Intermedius m

## The drawing shows three different resistors in two different circuits.

Question The drawing shows three different resistors in two different circuits. The battery has a voltage of V = 21 V, and the resistors have resistances of R1 = 50.0 Ω, R2 = 25.0 Ω and R3 = 10.0 Ω. Determine the current through and the voltage across each resistor.

## Which of the following statements is true about driving a nail into a board with a hammer?

Question Which of the following statements is true about driving a nail into a board with a hammer? a) The hammer exerts a greater force on the nail than the nail does on the hammer. b) The hammer exerts a force on the nail equal to the force that the nail exerts on the hammer. c) The hammer exerts a smaller force on the nail than the nail does on the hammer. d) It is impossible to conclude anything.

## A balloon with a radius of 14.0 cm and an electric charge of 3.75×10^-9C

Question A balloon with a radius of 14.0 cm and an electric charge of 3.75×10^-9C is brought within the electric field of the larger balloon so their centres are 40.0 cm apart. Determine the magnitude of the electric force exerted by this electric field on the smaller balloon.

## Brass is an alloy made from copper and zinc. A 0.66 kg brass sample

Question Brass is an alloy made from copper and zinc. A 0.66 kg brass sample at 98.6 °C is dropped into 2.33 L of water at 4.6 °C. If the equilibrium temperature is 7.0 °C, what is the specific heat capacity of brass? Express your answer as J/kg°C.

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