Explain why it is important for scientists to balance open-mindedness and skepticism.

Glossopteris is an ancient, extinct species of found in South America, Africa, Asia, Australia, and Antarctica.

In a circular loop of wire lying on a horizontal floor, the current is constant and, to a person looking downward, has a clockwise direction. The accompanying magnetic field at the center of the circle is directed a) horizontally and to the east.

Why did alpha particles bounce back

Which best explains how fiber-optic technology has improved communication? It has eliminated the need to send audio data through telephones. It has allowed for faster transmission of Internet signals.

In addition to an all-round white light, what light (s) must power-driven vessels less than 65.6 feet (20 meters) long exhibit when underway between sunset and sunrise?

1. Using Pj = e^-BE/Z in the Gibb's form for the entropy, show that F = kb Tln (Z), where F = U - TS is the Helmholtz free energy. Here Z= e^-BE is the canonical partition function ...

Modern oil tankers weigh over a half-million tons and have lengths of up to a quarter of a mile. Such massive ships require a distance of 5.0 km (about 3.0 mi) and a time of 22 min to come to a stop from a top speed of 26 km/h.

Suppose a yo-yo has a center shaft that has a 0.232 cm radius and that its string is being pulled. If the string is stationary and the yo-yo accelerates away from it at a rate of 1.50 m/s 2, what is the angular acceleration of the yo-yo?

How far into editing our human genes?

Which electromagnetic wave has the shortest wavelength? (A. Radio waves b. X-rays c. infrared rays or d. Visible light)