A spherical balloon of volume 4.00 x 10 - 3 m contains helium at a pressure

of 1.20 x105 Pa. How many moles of helium are in the balloon if the average

kinetic energy of the helium atoms is 3.60 x 10-22 J?

An aluminum screw has a density of 2.7 g/mL and a volume of 15mL. What is the mass of the screw?

When current increases and resistance remains constant what must happen to voltage? A) Voltage must decrease. B) Voltage must increase. C) Voltage will remain the same. D) Voltage is not affected by current and resistance.

The function h (t) = - 16t2 + 96t + 6 represents an object projected into the air from a cannon. The maximum height reached by the object is 150 feet.

escribe las características de las principales cuencas del país cuenca del Río guayas cuenca del Río esmeraldas cuenca del Río Amazonas

A cube, 1 m on each edge, is held 0.75 m below the surface of a pool of water by a rope. The mass of the cube is 700 kg, and the weight distribution is such that one face remains parallel to the surface of the water. a. Find the tension in the rope.

What is efficiencywhat is the formula of mechanical advantage and velocity ratio of labour

What is the wavelength of an ekectromagnetic wave that has a frequency of 40,000 hz? the speed of light is 3x10^8 m/s?

Witch of the following is an example of a pull

Can two like charges attract each other

By applying a force of 50N, a pulley system can lift a box with a mass of 20 kg. What is the mechanical advantage of the pulley system?