Science

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1. Science

   Which of the following is true about the magnetic field diagram below. Its shows 3 Arrows on top pointing to B A B 3 Arrows on bottom pointing to B A A is the south pole and B is the north pole B A is the north pole and B is the

2. Science

   An electromagnet is the most powerful type of magnet there is . It is a magnet with a current running through it that can be turned on and off , Why might it be useful to be able to turn the electromagnet on and off ? To control

3. Science 7B

   An electromagnet is the most powerful type of magnet there is. It is a magnet with a current running through it that can be turned on and off. Why might it be useful to be able to turn the electromagnet on and off?(1 point) to

4. Math

   A string is cut in half,and one of the halves is used to bundle newspapers. Then one fifth of the remaining string is cut off. The piece left is 8 feet long. How long was the string originally? Please work this out. The anwser is

1. physics- answers check

   5. A magnetic field map shows a. the direction of the magnetic field. b. a few representational field lines. c. relative strength of the magnetic field. d. All of these choices are correct. my answer: d 6. Magnetic field lines a.

2. physics- answers check

   1. For a bar magnet, the magnetic field lines point a. towards the South pole. b. towards the North pole. c. always towards the magnet. d. always away from the magnet. my answer: a 2. Magnetic field lines a. are straight lines. b.

3. Chem Help!!

   A standard 1.000kg- mass is to be cut from a bar of steel having an equilateral triangular cross section with sides equal to 3.00in. The density of the steel is 7.70g/cm^3. How many inches long must the section of bar be?

4. physics

   The drawing shows a 156-kg crate hanging from the end of a steel bar (S = 8.1 x 1010 N/m2). The length of the bar is 0.117 m, and its cross-sectional area is 7.44 x 10-4 m2. Neglect the weight of the bar itself and determine (a)

1. physics

   A large bar magnet (mass of 0.4 kg) exerts a 5 N force on a small bar magnet (mass of 0.1 kg) located 20 cm away. Calculate the force exerted by the small bar magnet on the large one.

2. Science

   1.Electric charges that are different (1 point) attract each other. repel each other. exist in pairs. do not interact. 2. Magnetic field lines around a bar magnet (1 point) are only perpendicular to the magnet. spread out from one

3. physics

   A compound metal bar has 4 kg of copper making up the first third of the bar, while the remainder is made of 12 kg of lead. The bar is 3 meters in length. In addition, a mass of 2 kg is hung 1m from the left end of the bar, and a

4. dynamics

   A helical spring of stiffness k is cut into two halves and a mass m is connected to the two halves. The natural time period of this system is found to be 0.5 s. If an identical spring is cut so that one part is one-fourth and the

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