There is a 30 g sample of be-11 it has a half life of about 14 seconds how much will be left after 28 seconds

Insects breathe by using a system called tracheae. where are these tubes located on an insect

A platinum sphere with radius 0.0139 m is totally immersed in mercury. Find the weight of the sphere, the buoyant force acting on the sphere, and the sphere's apparent weight. The densities of platinum and mercury are 2.14 * 10 4 kg/m3 and 1.

4. The Voyager 1 and 2 spacecraft are now out beyond the orbit of Pluto. They have run out of fuel long ago but are still moving at a constant speed of 50,000 mph.

Which of the following materials offer the least electrical resistance? Pure water, wood, salt water, glass

Sunidhi made a study chart about changes in states of matter. Which headings best complete the chart? X melting sublimation Y freezing deposition X: Solid Directly to Liquid Y: Liquid Directly to Solid OX: Liquid Directly to Solid Y: Solid Directly

The malfunction indicator light in an OBD II system is flashing. Technician A says that this simply indicates a soft failure. Technician B says this means the problem could be damaging the catalytic converter. Who is right? A. Technician A only B.

What are some methods humans have used to control flooding and what has been done to worsen the effects of flooding?

Suppose an electron is moving with a constant velocity until it encounters a positively charged sphere on its right. How does the sphere alter the trajectory of the electron? a. It has no effect on the trajectory of the electron b.

Most of the mass of the Milky Way exists in the form of: a.) starsb.) gasc.) dustd.) dark matter

A 55kg cart is pushed by a force of 225 n. what is the carts acceleration?