What is the main reason that the earth's interior is liquid today? tidal force of the moon on the earth seismic waves that travel through earth's interior decay of radioactive elements convective motions in the mantle?

In an action-adventure film, the hero is supposed to throw a grenade from his car, which is going 99.0 km/h, to his enemy's car, which is going 124 km/h. the enemy's car is 16.9 m in front of the hero's when he lets go of the grenade.

Adding more aluminum to a sheet of aluminum changes its mass and?

In a circuit with parallelresistors, the smaller resistance dominates; in a circuit with resistors inseries, the larger one dominates. Make some speci c examples of resistorsin parallel and in series to explain this rule of thumb.

Which force is sometimes attractive and has an infinite range?

How much work is performed when you push a couch of mass 44 kg a distance of 2.5 m using a force of 135 N?

A uniform, thin, solid door has height 2.20 m, width 0.870 m, and mass 23.0 kg. (a) find its moment of inertia for rotation on its hinges. (b) is any piece of data unnecessary

How does wavelength and frequency affect the speed?

A cyclist turns a corner with a radius of 37 m at a speed of 22 m/s. What's the cyclist acceleration? If the cyclist and cycle have a combined mass of 90 kg, what is the force causing them to turn?

A gas had a initial volume of 168 cm at a temperature of 255 k and a pressure of 1.6 atm the pressure of the gas decreased to 1.3 atm and the temperature of the gas increases to 285 k

A train travels 90 kilometers in 1 hours, and then 60 kilometers in 3 hours. What is its average speed