Density of some metals aluminum - 2.75 g ml magnesium - 1.74 g ml nickel - 8.80 g ml tin - 7.28 g ml roni picks up a sample of a silver, cylindrical-shaped piece of an unknown metal and is told by her teacher to find the identity of it. she decides to measure its mass by using an analytical balance. the mass is found to be 42.5g. she then puts the metal in a graduated cylinder with exactly 50 ml of water in it. the water rises to 55.8 ml. the formula for density is d = m v . based on the table, determine the identity of the unknown metal. a) aluminum b) magnesium c) nickel d) tin

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?