Calculate the force (in pounds) ona 4.0 ft by 7.0 ft door due to a 0.4 psi pressure difference.

The measure of how far an object moves in a given amount of time

if a person pulls on a cart to the right with a force of 10 Newtons and a second person pulls to the left with a force of 3 Newtons what is the net force + Direction on the cart

Explain why electromagnetic radiation sometimes act as a wave and sometimes as a stream of particles?

Two tuning forks produce sounds of wavelengths 3.4 meters and 3.3 meters. Given that the speed of sound is 340 m/s, approximately what beat frequency is produced when both tuning forks are struck simultaneously? A) 0.1 hertz B) 1.0 hertz C) 2.

A 10 kg shark swimming at 5m/s swallows an absent-minded 0.5 kg fish that is originally at rest. What is the speed of the large fish after eating the smaller fish?

Which of the following most accurately represents John Dalton's model of the atom?

A race car travels a circular track at an average rate of 135 mi/hr. The radius of the track is 0.450 miles. What is the centripetal acceleration of the car?

Between a substance and a mixture.

Two massive objects are fixed in position. A third object is placeddirectly between the first two at the position at which the totalgravitational force on the third object due to the two massiveobjects is zero.

Which statement best describes the magnetic properties of a material? Magnetic materials have many spinning, unpaired electrons Paired electrons of magnetic materials can move to other atoms Electrons of magnetic materials are strongly held by