Other Physics Answers

1. A clothes dryer at home has a power of 4, 500 watts and runs on a special 220 V household circuit. a) What is the current through the dryer? b) How many kilowatt-hours of electricity are used by the dryer if it is used for 4 hours in one week? 

7. A ball is thrown vertically upward with a speed of 7.1 m/s. Find:

(9 points)

a. Maximum height reached the ball

b. Its time of flight

C. Velocity the ball would return to its starting point

An aircraft is moving horizontally with a speed of 60 m/s. At the height of 2 km, an object is dropped from the aircraft. Acceleration due to gravity = 9.8 m/s2, what is the time interval before the object hits the ground.

What is the gravitational potential energy of a 3 kg ball that is 1meter above the floor

Speed Racer accelerates from rest at a constant rate of 6.5 m/s2. How fast will the racer be going at the end of 8 s?

water flow at a rate of 0.25 cm³/min in a horizontal pupe of varying cross sectional areas.Calculate the velocity of the water at a section where the rafius of the pupe is 6cm and (b) at a section where the rafius is 9cm

Calculate the rate of heat conduction out of the human body, assuming that the core internal temperature is 37.31 ºC, the skin temperature is 33.49 ºC, the thickness of the tissues between averages 1.46 cm, and the surface area is 1.27 m². (skin = 0.37W/m⋅°C)

An object falls from a high building and hits the ground in 9.0 seconds ignoring air assistance what is the distance that it fell

An object falls from a high building and hits the ground in 9.0 seconds. Ignoring air resistance, what is the distance that it fell?

In an optical fiber system refractive index of the core is 1.52 and that of cladding is 1.48 find the critical angel of the system