Physics Answers

What force must be applied to a surface area of 0.5m² to produce a pressure of 2.3×10⁵Pa?

You drive 9 miles east then 9 miles north

A 60-cm tall glass is filled with water to a depth of 40cm.What is the pressure at the bottom of the glass?

A sample of unknown material weighs 450N in air and 300N when submerged in water with a density of 1000kg/m³.What is the density of the material?

Find the mass of 3 liters of water. Show your solution

1.The intensity of sound is found to be 7.3×10^-5 Wm^-2 at3.5m.Find the soind intensity if the observer is:

a. 2m

b. 5m

c. 10m

2.Solve for the power in problem number 1 (a,b,c)

1.A string is 1.2m long.If the wave speed is 400m/s.Find the

a.first harmonic

b.second harmonic

c.third harmonic

d.fourth harmonic

e.tenth harmonic

2.Find the wavelength of each harmonic in problem 1.

a.first harmonic

b.second harmonic

c. third harmonic

d.fourth harmonic

e.tenth harmonic

The gorilla, feeling exuberant, throws a 0.50kg banana straight up in the air from the ground with an initial energy of 30j. How high will the banana travel up?

The pitch of a jackscrew shown in figure 2 is 0.3 cm and has a lever arm of 60 cm length.

What force at the end of the lever arm will raise a load of 190 kg if the efficiency of the machine

is 12 %?

9. Two 50 µF capacitor are connected in series. The equivalent capacitance of the combination is A. 25 µF B. 100 µF C. 50 µF D.200 µF 10. Two 50 µF capacitor are connected in parallel. The equivalent capacitance of the combination is A. 25 µF B. 100 µF C. 50 µF D. 200 µF