Which of the following is a characteristic of a white dwarf star?

A) low density

B) low volume

C) very bright

D) very hot

E) very cool

The index of refraction is based on the ratio of the speed of light in?

Which of the following is NOT a field force? A. Magnetism B. Gravity C. Friction D. Electricity

Charge is flowing through a conductor at the rate of 420 C/min. If 742 J. of electrical energy are converted to heat in 30 s., what is the potential drop across the conductor?

What do scientists call a property of matter that can be observed without changing the identity of the matter itself?

A boxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. The moving boxcar collides and links with the stationary cars and they all move off together along the track.

Convert 4,200 decigrams to grams

A beam of light is incident upon a flat piece of glass (n = 1.50) at an angle of incidence of 30.00. Part of the beam is transmitted and part is reflected. Determine the angle between the reflected and transmitted rays

A 29 foot ladder leans against a building so that the angle between the ground and the ladder is 75 ∘. How high does the ladder reach up the side of the building? Round to 2 decimal places.

What is a difference between an isotope and a ion

2. An airplane travels 335 miles in 45 minutes. How fast does it travel? How fast is that in km/hr?