Type of lens used by watch repairers

concave or convex

A 60kg of weight person climbs stairs of total height 20m in 2min. calculate the power

Period 1 has 15 students in it and a test average of 86%. Period 2 has 21 students in it and an average of 88%. Period 3 has 12 students in it and an average of 95%. Use weighted means to find the overall average of the classes. 87.3% 88.7% 89.

The nuclei of carbon atoms that are found in Nature come in two main "varieties" called isotopes (more on this in Chapter 11). The carbon-14 nuclei have a greater mass than the carbon-12 nuclei.

What is the term for vectors that lie in a straight line? A. Velocity B. Two-dimensional C. One-dimensional D. Displacement

How does the centripetal force depend on speed, radius and the revolving mass?

Two positive charged particles will?

A freight train has a mass of 1.5 X 10^7 kg. If the locomotivecan exert a constant pull of 7.5 X1^5 N, how long does it take toincrease the speed of the train from rest to 80 km/h?

Select each correct answer. If an object is moving, the amount of kinetic energy it has directly depends upon which of the following factors? the object's density the object's mass the object's shape the object's velocity

If a wave has a speed of 12 m/s and a frequency of 4hz what is its wavelength

All atoms of an element have the same?