Which feature signifies to astronomers that a distant star is part of a planetary system

Beyond the petition Neptune a field of smaller bodies orbits the Sun. Some scientists think these objects are the remains of material that formed the early solar systems. Use what you know about how solar systems form to evaluate this hypothesis.

A makes an angel of 30.0 above the positive x-axis, and B makes an angel of 45.0 below the negative x-axis. A=3.00 units and B=2.00 units. Find A+B and A-B Show me step by step if you can

Compare and contrast locomotor and non locomotor skills

5. A marble or small sphere, made of stone, is found to have a mass of 3.05 g. To find its volume, it is placed in a graduated cylinder that originally contains 10.00 mL of water.

7. A 1300 kg car starts at rest and rolls down a hill from a height of 10.0 m. It then moves across a level (frictionless) surface and collides with a light spring-loaded guardrail with a spring constant k of 1.0 x 106 N/m.

The air over Earth's surfaces absorbs heat from the materials of Earth. In Section 3 of the experiment, the air over the sand the air over the water because sand water.

Describe the rise and fall of a basketball using the concepts of kinetic energy and potential energy

Another word for character in sports is "sportsmanship." - True False

Assume an 8-kg bowling ball moving at 2m/s bounces off a spring at the same speed that it had before bouncing. What is the momentum of the recoil?

A physics book slides off a horizontal tabletop with a speed of 3.90 m/s. It strikes the floor in 0.350 s. Ignore air resistance. Find the height of the tabletop above the floor.