Other Physics Answers

A hall has a volume of 240m³. An air conditioning system is to replace the air im this hall every thirty minutes using ducts that have a square cross section. Assuming that air can be treated as an incrompessible fluid, find the length of a side of the square if the air speed within the ducts is 6.0 m/s.

A rectangular prism is 15.0 cm long and 7.5 cm wide. What is its area in meters

Calculate the area of a surface on which pressure exerted by a wooden block is 20kPa and weight of block is 100N

Two points are placed as follows: Charge q¹= -1.50 nC is at y=+6.00m and charge q²=+3.20 nC is at the origin. What is the total force (magnitude and direction) exerted by these two charges on a negative point charge q³= -5.00 nC located at (2.00m, -4.00 m)?

Two objects with masses of 6.00 kg and 4.00 kg are connected by a light string that passes over a frictionless pulley, as in the Figure. Determine a)the acceleration of each object, b)the tension in the string, and c)the distance each object will move in the first second of motion if both objects start from rest.

A stone is launched straight up by a slingshot. Its initial speed is 25 m/s and the stone is 1.8 m above the ground when launched. a)How high above the ground does the stone rise? b)How much time elapses before the stone hits the ground?

A car traveling due east with an initial velocity of 10 m/s accelerates for 6 seconds at a constant rate of 4 m/s2. i.What is its velocity at the end of this time? ii.How far does it travel during this time?

An explorer is caught in a whiteout (in which the snowfall is so thick that the ground cannot be distinguished from the sky) while returning to base camp. He was supposed to travel north for 5.6 km, but when the snow clears, he discovers that he actually traveled 7.8 km at 50° east of north. How far and in what direction must he now travel to reach base camp?

2.An A4 sheet of paper has length 29.69 ± 0.01 cm, width 21.1 ± 0.1 cm. Determine the area of the sheet of paper in cm2 with appropriate uncertainty.

1.A physics professor leaves her house and walks along the sidewalk toward the campus. After 5 min it starts to rain and she returns home. Her distance from the house as a function of time is shown in the figure. At which of the labeled points is her velocitya) zero? ____________________ b) constant and positive? ____________________ c) constant and negative? ____________________