A steel block with a density of 7800 kg/m3 is suspended from a string in a beaker of water so that the block is com-
pletely submerged but not resting on the bottom. The block
is a cube with sides of 3 cm (0.03 m).
a. What is the volume of the block in cubic meters?
b. What is the mass of the block?
c. What is the weight of the block?
d. What is the buoyant force acting on the block?
e. What tension in the string is needed to hold the block in
place?

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?

Agraduated cylinder contains 63.0 ml of water. a piece of gold, which has a density of 19.3 g/ cm3, is added to the water and the volume goes up to 64.5 ml. calculate the mass in grams of the gold that was added to the water. explain how you got your answer.

What causes the development of most clouds and precipitation in the atmosphere?