Radio telescopes can sometimes detect stars which are behind dust clouds.

a. True

b. False

Which is an example of radiation? A. An ice pack is placed on a knee, and the knee cools down. B. A rock is warmed by an ultraviolet heat lamp. C. Hot coffee in a mug causes the mug to warm up. D. Cold salt water sinks to the bottom of the ocean.

X-rays, gamma rays, and particle bombardment such as neutron beam, electron beam, protons, and mesons, all give off ionizing radiation. This type of radiation can be used for medical testing and treatment, industrial purposes, and weapons.

Describe light according to the current accepted theory, be very detailed

It is possible to break a crystal glass by singing a certain note

Which is true? g If you connect two different resistors in parallel in a circuit, then the current that flows through each of them is different.

Earth spinning on its axis is which type of movement? A) Translational B) Rotational C) Vibrational

The light from one end of the Milky Way galaxy takes about 150,000 years to travel to the other end. Which of these statements is correct about the Milky Way galaxy? A: The distance between the two ends of the galaxy is 150,000 light years.

A hydrogen ion will always combine with: A: A water molecule B: hydroxide ion C: hydronium ion D: another hydrogen ion You can only select one

During heavy exercise, the body pumps 2.00 L of blood per minute to the surface, where it is cooled by 2.00ºC.

In an isolated system, two cars, each with a mass of 1,500 kg, collide. Car 2 is initially at rest, while Car 1 was moving at 20 m/s. What is their final speed? A. 10 m/s B. 20 m/s C. 30 m/s D. 5 m/s