An arrow fired horizontally at 27m/s travels 68m horizontally before it hits the ground. From what height was it fired?

Which have a positive charge? neutrons atoms protons electrons

A neutron star has more mass then what and is about the same size as what?

By what amount does the 52-cm-long femur of an 73 kg runner compress at this moment? The cross-section area of the bone of the femur can be taken as 5.2*10-4m2 and its Young's modulus is 1.6*1010N/m2.

Why is carbon monoxide such as dangerous form of indoor air pollution?

What does a calorimeter directly measure? change in temperature kinetic energy specific heat radiation

Gerry is looking at salt under a powerful microscope and notice a crystalline structure. what can be known about the salt sample that Gerry is looking at

The kinetic energy of a moving object is equal to the work required to bring it to its speed from rest, or the work the object can do while being brought to rest.

Imagine standing on a bathroom scale and reading your weight. now lift one foot and read your weight again. does the scale read more, less or the same weight when you are standing on one foot?

The period T of a simple pendulum depends on the length L of the pendulum and the acceleration of gravity g (dimensions L/T^2). (a) Find a simple combination of L and g that has the dimensions of time.

What is an example of the theory that the best adapted organisms for an environment are the ones most likely to survive