The gases cast off by a dying star are called A. dark matter. B. neutron clouds. C. planetary nebulae. D. remnants.

A special device can transmit sound out of phase from a noisy jackhammer to its op - erator using earphones. over the noise of the jackhammer, the operator can easily hear your voice while you are unable to hear his. why?1.

One man wanted to weigh the air. He blew a balloon and weighed it. Then he blew air out of the balloon and weighed again. The weight in both cases was the same. From this the man concluded that the air weighs nothing.

A circuit has a current of 2.4 A. The voltage is increased to 4 times its original value, while the resistance stays the same.

To date, Saturn is known to have 13 rings made from which of the following?

Clearly distinguish between mass, weight, and volume.

Whats the core of electromagnet made of?

Ultraviolet light emits a total of 2.5 * 10^-17 J of light at a wavelength of 9.8 * 10^-7 m. How many photons does this correspond to?

3. A ray of light incident on one face of an equilateral glass prism is refracted in such a way that it emerges from the opposite surface at an angle of 900 to the normal. Calculate the i. angle of incidence. ii.

What would happen to the stratosphere if humans were to increase the amount of ozone within it?

The noise floor, also known as additive white Gaussian noise (AWGN), is a continuous noise level that appears over a wide spectrum when viewed in the frequency domain. a. Trueb. False