How many neutrons does element X have if its atomic number is 40 and its mass number is 160?

A car travels 40m in 8 seconds find the car speed

A circular loop of wire with a radius of 4.0 cm is in a uniform magnetic field of magnitude 0.069 T. The plane of the loop is perpendicular to the direction of the magnetic field. In a time interval of 0.

In the case of mechanical waves, what causes or determines the speed of the waves, the frequency of the waves, and the wavelengths of the waves?

We inhaie oxygen and exhale dioxide in the result of a what change

Three ideal polarizing filters are stacked, with the polarizing axis of the second and third filters at 21⁰ and 61⁰, respectively, to that of the first. If unpolarized light is incident on the stack, the light has intensity 60.

If a wave is traveling at a constant speed, and the frequency decreases, what would happen to the wavelength? A) It would increase B) It would decrease C) It would remain constant D) It would drop to zero

What conditions lead you to see an absorption line spectrum from a cloud of gas in interstellar space?

A car travels 35.0 mph north for 1.00 hour, then 40.0 mph east for 0.0500 hour, and finally 50.0 mph northeast for 2.00 hours. Calculate the average speed.

A 500 lb steel beam is lifted up by a crane to a height of 100 ft and is held there. A) How much work is being done to hold the beam in place? B) How much work was done to lift the beam?

If Light is shone through the slits of a card onto a sheet of white paper describe what is seen.