Sejul

This page lists questions and answers that were posted by visitors named Sejul.

Questions

The following questions were asked by visitors named Sejul.

charging by induction creates charge by transferring charges from one object to another OR separates charges within an object

14 years ago

person weighs 526 N on Earth. Another planet has twice the mass of Earth and Twice the radius of Earth. Find the weight on the other planet. I need help with a formula too.

14 years ago

Two girls each weight 500 N. Ride in a car traveling at 20.0 m/s. One wears a seat belt. The other does not. In an accident the girl wearing the seat belt is brought to a stop in 0.120 seconds. The dashboard brings the other one to a stop in only 0.00800...

14 years ago

If a pointer on a spring scale moves 0.0254 m when a 2.224 N weight is fastened to the hook, the pointer will move how many m when a 17.79 N weight is used?

14 years ago

I need formula/problem set ups for the following 2 problems: 1)Find The work done by the force in pulling an object on an inclined plane from A to B (ground level to top): Length of incline (like a hypotenuse): 30 m Height of incline (y axis): 10 m Force...

14 years ago

in an experiment using Coulomb's apparatus, a sphere with a charge of 3.6 x 10^-8 C is 1.4 cm from a second sphere of unknown charge. The force between the spheres is 2.7 x 10^-2 N. What is the charge of the second sphere? I get 1.3 x 10^-4 C, but the ans...

14 years ago

For which angles beta, with 0 degrees less than/equal to beta less than/equal to 180 degrees, is sin 3beta equal to -1? a) 30 degress and 150 degrees b) 60 and 120 degrees c) 90 degrees d) 0 and 120 degrees I think it is C because sin of (3 x 90 = 270) 27...

14 years ago

an oil drop has a charge of 8.0 x 10^-19 C. How many excess electrons does the oil drop have?

14 years ago

German silver wire has a cross-sectional area of 2.047 x 10^-3 cm^2. How many meters are needed to make a resistance of 100 (omega)? I don't know where to begin.

14 years ago

I need to know the resistivity of german silver wire. I've looked at a few Google sources and I've seen several different results. Anyone know which value I should use?

14 years ago

German silver wire has a cross-sectional area of 2.047 x 10^-3 cm^2. How many meters are needed to make a resistance of 100 (omega)? I can't find the resistivity of German silver wire. I've googled a few places, but each one gives me a different number. C...

14 years ago

Electric power is found by multiplying ___ by current. Is voltage or potential difference a better choice to use?

14 years ago

inserting a resistor in series with a combination of two or more resistors in parallel will ___ the voltage across the parallel circuit

14 years ago

if one resistor is removed from a parallel circuit, the total current will 1) decrease b) increase c) remain the same and the current flowing through each of the remaining branches ____________________.

14 years ago

An open box is to be constructed from a rectangular sheet of tin 3 meters wide by cutting out a 1-meter square from each corner and folding up the sides. The volume of the box is to be 2 cubic meters. What is the length of the tin rectangle?

14 years ago

Can you use algebra to find a quadratic equation if your know the coordinates of just ONE point on its graph? Can you use algebra to find a quadratic equation if your know the coordinates of just TWO points on its graph? If so, what information is needed?

14 years ago

length of rectantular rug is 7/6 its width. rug is placed on floor with 1 foot margin all around. area of floor is 4 times that of margin. find the dimensions of the room.

14 years ago

radiators sell for $350. Let x be radiators. profit shown by equation p= -.01x^2 +375x -600,000. What number of radiators will produce the larget possible profit? What is the largest possible profit?

14 years ago

open top rectangular box made from 35 x 35 inch piece of sheet metal by cutting out equal size squares from the corners and folding up the sides. what size squares should be removed to produce box with maximum volume.

14 years ago

For every point (x,y) on the graph y = 30 - 5x^2, consider a rectangle with corners (-x, 0), (-x,y), (x,0), and (x,y). For which value of x does the rectangle have a maximum area?

14 years ago

True or false: 2 ln x / ln 5 = ln x^2 - ln 5 for all positive values of x.

13 years ago

solve 3^(2x+1) = 9^(2x-1) using base 3 logs

13 years ago

have 50 sq ft of material to make an open top box with a square base. a) use formula for surface area to express the height h of the box in terms of x. b) find the dimensions of the box that will produce the maximum volume.

13 years ago

In a circle with radius of 7 cm, an arc of the circle has length 22 cm. The central angle theta is ??

13 years ago

A man has 400 meters of fencing and wants to fence in a rectangular field next to a straight river. Assuming that no fencing is needed along the river, what are the dimensions of the field with the largest possible area?

13 years ago

Soccer player kicks a ball down field. The ball's initial velocity is 30 m/s, 30 degrees above horizontal. a) What is the ball's horizontal velocity at the maximum height of the ball's trajectory? b) What is the horizontal displacement of the ball just be...

13 years ago

a .20 kg ball on a string is whirled on vertical circle at constant speed. When the ball is at 3:00 position, tension is 16 N. a) is centripetal force acting on ball the same at each point on the circle? b) when the ball is at 3:00, what is proving the ce...

13 years ago

How many pounds of water are in a 36 ft diameter tank that is filled to a depth of 24 ft? Thank you.

13 years ago

A 10 lb. frozen boneless roast needs to be thawed and baked to a temperature of 200 degrees F. The storage freezer maintains a temperature of -10 degrees F. Pork changes from solid to a thawed state at 30 degrees F and has the following properties: Heat C...

13 years ago

Although I vaguely see DrBob222's concept, I still need some help in the set up. Thank you. A 10 lb. frozen boneless roast needs to be thawed and baked to a temperature of 200 degrees F. The storage freezer maintains a temperature of -10 degrees F. Pork c...

13 years ago

Calculate the amount (g) of each of the following salts that need to be added to a 200 mL volumetric flask to produce a 2 M solution of S. CaSO(subscript 4) [NH(subscript 4)subscript 2]SO(subscript 4) NOTE: the subscript 2 is outside the (NHsubscript 4) F...

12 years ago

Calculate the amount (g) of each of the following salts that need to be added to a 200 mL volumetric flask to produce a 2 M solution of S. CaSO4 (NH4)2SO4 Fe2(SO4)3 Dr. BOB222, Could you please check the following? Thank you. CaSO4: moles x atomic mass =...

12 years ago

Grandpa places money in an account on your first birthday and will place that same amount in the account every year, ending with your 18th birthday. So there is a total of 18 deposits starting on first birthday. He expects to earn 8% interest per year. Ho...

11 years ago

Mortgage company lets you pay a point (1% of total amount of loan)to reduce APR from 6.5% to 6.25% on a $400,000 30-yr mortgage with monthly payments. Plan to be in house for at least five years. Should you pay the point?

11 years ago

Answers

The following answers were posted by visitors named Sejul.

I see 18% Nickel Alloy A (under pure silver) is listed as 2.874 x 10^-7 Is this what I should use?

14 years ago

okay so the total current will decrease, but what about the second part? and the current flowing through each of the remaining branches ____. remains the same????

14 years ago

Thank you so much for your help.

13 years ago

Dr. Bob222, Could you please check the following? Thank you. CaSO4: 54.45664 g (NH4)2SO4: 12.8264 x 132.1402/32.066 (molar mass(NH4)2SO4/atomic mass S)= 52.85608 g Fe2(SO4)3: 12.8264 x 399.8801/32.066 (molar mass Fe2(SO4)3/atomic mass S)= 159.95204 g Than...

12 years ago

I'm confused again. Can you show me how to get the CaSO4 so I can do the other two? What did I do wrong? I showed you my work. I thought I followed your instructions from Saturday. You said I needed a number near 13. I got the 12.8264. If you could please...

12 years ago

2. Tu dessines 4. Elle peut marcher. 5. Nous pouvons frapper.

12 years ago