Science project

posted by .

I need to find an object that will sink to the bottom of a glass of water, then rise to the surface within 30 seconds. I can't find that object!!

  • Science project -

    what about a glass vial with a bit of baking powder in it?

  • science project -

    how do you know what to do for a science project?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    acceleration due to gravity questions when an object is dropped from a height of 10m above the surface of the planet z, it takes 1.2 seconds for the object to reach the surface. what is the acceleration of a falling object near the …
  2. physics

    I need to design an object that will sink when placed in a 20-gallon tank of room temperature water. After 30 seconds all or part of the object must resurface and remain floating. Closest to 30 seconds wins. I may not use Alka-Seltzer …
  3. physics - i need A.S.A.P

    An object of mass 1.5 kg is placed on a rough horizontal surface, as shown in Figure 1. Force F acts on the object. When the magnitude of F is 10 N, the object just begins to slide. Determine the coefficient of static friction between …
  4. Science

    1. A convex mirror with a focal length of -20cm forms an image 15cm behind the surface. If the object height is 1.2cm what is the image height?
  5. Science 8R - Homework Qs. Check

    If an object has mass of 70.5g and a volume of 64 cm(3), what is its Density?
  6. Physics

    An object weighing 400.0g in air is immersed in water after being tied to a string connected to a balance. The scale now reads 364.6g. a.) Find the loss of weight(in gram of weight) when completely submersed in water. b.) Find the …
  7. Calculus

    An object is traveling along the x axis so that its speed is given by v(t)=t^2-7t+10 m/s. (a) Find the times when the object is at rest. (b) Find the acceleration at both of these times. Interpret the acceleration in terms of the motion …
  8. Physics

    Three identical glasses are filled to the same height with water. The first glass is filled with water only(Wa). The second glass has an object of volume V and density half that of water floating in it (Wb). The third glass has an …
  9. physic

    An object of mass m is at rest at the top of a smooth slope of height h and length L. The coefficient of kinetic friction between the object and the surface, μk, is small enough that the object will slide down the slope if given …
  10. physics

    A 0.40kg object is attached to a spring constant 160N/m so that the object is allowed to move on a horizontal frictionless surface. The object is released from rest when the sprin g is compressed 0.15m find: a) the force on the object …

More Similar Questions