Other Physics Answers

A jet airliner flies at a constant speed covering for 98 miles in 2.3 hours. What is the speed of the plane in miles per hour

A car intially traveling at 83.1 mi/h, slows to rest in 9.3s . What is the cars acceleration.

A car initially at rest accelerates at 5.22 M/S to the second for 14.9 seconds how far did it go in this time

If φ = 2xz4 – x2y, find ∇φ and ‖∇φ‖ at the point (2, -2, -1).

Ans. 10 𝒂̂𝑥 - 4 𝒂̂𝑦 - 16 𝒂̂𝑧 , 2√93

Answer the following conceptual questions and practice about potential and kinetic energy.

1. You have two balls, a tennis ball and a baseball with twice the mass of the tennis ball. If you want to throw both balls with the same kinetic energy, how much faster should the tennis ball be compared to the baseball? Label your answer

Lesson: Torque

Instruction: Analyze and solve the following problems step-by-step.

1. Find the total torque acting on a body when three forces are applied on the

following: F1=10 N upward at 1 m,F2=20n upward at 2 m and F3=5N downward at 0.5 m.

2. During a machining test on a lathe, the tangential force on the tool is 150 N. If the torque on the lathe spindle is 12 N m. determine the diameter of the work-plece

Moment of Inertia

Instruction: Analyze and solve the given probleme.

1. A uniform, thin, solid door has height 2.00 m, width 0.825 m, and mass 23.5 kg. . a) Find its moment of Inertia for rotation on Its hinges. b) Is any piece of data unnecessary on the given problem?

2.A system consists ( thin-hollowed sphere) of three email masses rotating at the same speed about the same fixed axis The masses and their radii of ratation are: 16 g at 256

mm, 23 g at 192 mm and 31 g at 176 mm. Determine (a) the moment of inertia of the system about the given axis.

Drive Bernoulli's equation and list all the assumptions made in driving the equation.

For a person at rest, the blood pressure in the aorta is 120 torr, and the velocity of the blood is 25cm/s. The person then goes for the brisk walk raising the blood velocity to 100cm/s. Using Bernoulli's equation and assuming that the height of the blood is constant calculate the blood pressure in the aorta during the brisk walk. Hint: convert everything to standard units.

In an adult, the aorta's radius is normally ~1.5cm, and blood moves through it at an average speed of 30m/s. If a typical capillary has a radius of 5×10^-6m and blood passes through them with velocity of 0.1cm/s approximately how many capillaries are in the blood?