A ramp is often used to raise an object. If 80 joules of energy are needed to lift an object to a platform but 100 joules are used in rolling the object up the ramp, what is the efficiency of the ramp?

An object is dropped at a height of 6 m from the ground. How fast is it moving just before it hits the ground?

If a mass of 0,76 kg is hung from spring no. 2 what will be its change in length?

Describe the following wave characteristics associated with Transverse and longitudinal waves-amplitude, wavelength, and frequency.

How many valence electrons does an atom of sulfur have? how many valence electrons does an atom of sulfur have? 6 4 16 10?

How do the frequency and period of a wave relate together

Why is the thickness greater for the bass strings of a guitar than for the treble strings?

An atom of helium and one of argon are singly ionized - one electron is removed from each. The two ions are then accelerated from rest by the electric field between two plates with a potential difference of 150 V.

Comparing and contrasting ionic and covalent bonds?

The difference between the speed of sound n air at 0°C and the speed of sound in air at 20°c is that ... A. Cooler air molecules move more slowly and respond less readily to the energy of a sound wave. B.

Give the symbols for 4 species that are isoelectronic with the telluride ion, te2-.