Recent content by slaw155

The answer still came out wrong?

Oh I see. So basically letting A= field due to point charge (which is in y-axis direction) and B = field due to field in x-axis direction, because they are at right angles to each other net electric field at y=0.2m = square root of [ [(9x10^9 x 9.8x10^-9)/(0.2^2)]^2 + (3600^2)]?

Doesn't the point charge give a field in all directions?

So 3600N/C field acts in the x-axis direction, and the field from the point charge acts in all directions with a value of (9x10^9 x 9.8 x 10^-9)/0.2^2. So what I do is add these two together to find the total electric field in the x-axis direction (let this sum be A), and the field in the y-axis...

So because the uniform field acts perpendicular to the field from the point charge, the electric field at y=0.2m would be just the electric field from the point charge alone? Is my understanding correct?

Homework Statement A uniform electric field exists everywhere in the x, y plane. This electric field has a magnitude of 3600 N/C and is directed in the positive x direction. A point charge -9.8 × 10-9 C is placed at the origin. Find the magnitude of the net electric field at y = +0.20...

Homework Statement A diverging lens (f = –13.0 cm) is located 18.0 cm to the left of a converging lens (f = 31.0 cm). A 3.30-cm-tall object stands to the left of the diverging lens, exactly at its focal point. Determine the distance of the final image relative to the converging lens Homework...

Thanks solved it turns out I made a mistake on my calculator.

A bat uses ultrasound at 40kHz to locate a stationary insect. If bat is flying directly towards the insect at speed of 4m/s at what frequency does the bat receive the ultrasound reflections from the insect? Speed of sound = 340m/s. I went frequency = frequency of source x (velocity of...

thanks solved it

thanks solved it

What decibel increase does a hearing aid produce if its sound gathering area is 900cm^2, the area of the eardrum is 0.5cm^2, but it only has an efficiency of 5% in transmitting sound to the eardrum? I know sound level = 10log(final intensity/initial intensity), but we've only been given areas...

Diverging lens has focal length 6mm and image magnification 0.5. What is the distance between object and lens? I used the fact that distance image to lens/distance object to lens = 0.5 and the lens maker formula with f=-6 and combined the two formula but this gives distance = 18mm, when answer...

Sun emits 153.6 x 10^15 J of energy onto a region that is 20km by 20km in area. The intensity of the sun on this region is 685W/m^2. How many days would it take for the sun to put that amount of energy onto the region? I went intensity = power/area and got to a time of some 44000seconds...

A bat uses ultrasound at 40kHz to locate a stationary insect. If bat is flying directly towards the insect at speed of 4m/s at what frequency does the bat receive the ultrasound reflections from the insect? Speed of sound = 340m/s. I went frequency = frequency of source x (velocity of...