A constant braking force of 10 newtons applied for 5 seconds is used to stop a 2.5-kilogram cart traveling at 20 meters per second. the magnitude of the impulse applied to stop the cart is

Which of the following describes an electric fan?

A certain lightning bolt moves 40 C of charge. How many fundamental units of charge |qe| is this?

A capacitor with plates separated by distance do is charged to a voltage difference ΔVC. All wires and batteries are disconnected, then the two plates are pushed together (with insulated handles so charges cannot flow) to a new separation distance

Which of the following is an example of the conversion of kinetic energy into gravitational potential energy? A) a person parachuting out of an airplane. B) a car racing around an oval track. C) a person skiing down a hill.

What will be accomplished by lowering the activation energy of a reaction?

A race car starts from rest and speed up uniformly to the right until it reaches a maximum velocity of 60m/s in 15 sec

The magnitude of a velocity vector is called speed. suppose that a wind is blowing from the direction n45°w at a speed of 40 km/h. (this means that the direction from which the wind blows is 45° west of the northerly direction.

The y component of the electric field of an electromagnetic wave traveling in the + x direction through vacuum obeys the equation Ey = (375 N/C) cos[kx - (2.20 * 1014 rad/s) t]. What is the wavelength of this electromagnetic wave? (c = 3.

The work of Subrahmanyan Chandrasekhar is likely to have been most influenced by the work of which of the following scientists? A. Albert Einstein B. Edwin Hubble C. Marie Sklodowska-Curie D. Lord Kelvin

Explain why it's important that the alveoli is only 1 cell thick