Physics and career

my problem is how can physics help us in careers such us biotechnologist,astronomist,geology,biotechnology,aerospace,industry and communications?

Buoyant Forces

A bathysphere used for deep sea exploration has a radius of 1.5m and a mass of 1.2*10^4kg. In order to dive, this submarine takes on mass in the form of sea water. Determine the mass the submarine must take on so that it can descend at a constant speed of 1.2m/s, when the resistive force on it is 1100N upward. The density of ...continues

Buoyant Forces: Finding the horizontal area enclosed by the waterline.

Suppose one of the navy ships bobs up to float 11cm higher in the water when 50 fighters take off from it in 25 minutes, at a location where g=9.78m/s^2. Bristling with bombs and missiles, the planes have average mass 29000kg. Find the horizontal area enclosed by the waterline of the 4 billion dollar ship. By comparison, its ...continues

Physics Problems College Level 1 (Momentum and Collisions)

Show all steps (all questions): 1)Impulse and momentum change/varying force. A 10-kg asteroid is traveling through space at 2 m/s toward a spaceship. To avoid a collision, an astronaut, with the help of a backpack rocket, exerts a force of 20 N on the asteroid in the opposite direction for 5 s. (a) find the asteroid's fina ...continues

Physics Problems College Level 1(work, energy, power)

Show all steps (for all problems) 1) Work. A pickup truck is hauling a barge along a canal at constant speed. The truck, driving parellel to the waterway, is attached to the barge by a cable tied to the bow making a 30 degree angle with the forward direction. If the truck exerts a froce of 1000 N on the cable, how much work ...continues

Energy in Thermal Processes

A 60kg runner expends 300W of power while running a marathon. Assuming that 10% of the energy is delivered to the muscle tissue and that the excess energy is primarily removed from the body by sweating, determine the volume of bodily fluid (assume it is water) lost per hour. (At 37degree C the latent heat of vaporization of wat ...continues

What is the weight of a 66-kg astronaut (a) on Earth (b) on the moon (g=1.7m/s2, (c) on Mars(g=3.7m/s(square) , (d) in outer space traveling with constant velocity?

1. A 0.140-KG BASEBALL TRAVELING 45.0m/s strikes the catcher's mitt,which in bringing the ball to rest, recoils backward 11.0 cm. What was the average force applied by the ball on the glove. 2.A box weighing 70(newtons) rests on a table.A ROPE TIED TO THE BOX RUNS VERTICALLY UPWARD OVER A PULLEY AND A WEIGHT IS HUNG FROM THE ...continues

Basic Thermal....Other Problems that are basic.

1.A space vehicle returning to Earth is fist slowed by its motors to a speed of 450m/s and then is slowed further to 100m/s by air resistance in the atmosphere. Its average heat capacity is 0.60kJ/kg-Cdegrees. Find the increase in its temperature on the assumption that 70% of the heat produced is absorbed by the vehicle and th ...continues

The Gravitational Force

Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 1.20 meters. Two of the spheres have a mass of 2.80 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces that the spheres exert on each other, what is the ...continues

Working with centripetal acceleration and force.

A child is twirling a 0.0120 kg ball on a string in a horizontal circle whose radius is 0.100 m. The ball travels once around the circle in 0.500 s. (a) Determine the centripetal force acting on the ball. (b) If the speed is doubled, does the centripetal force double? If not, by what factor does the centripetal force incre ...continues