What is the kinetic energy of a 620.0 kg roller coaster moving with a velocity of 9.00 m/s?

A 2,790 J

B 5,580 J

C 25,100 J

D 50,200 J

Which statement about subatomic particles is true? A. Protons, neutrons aND electrons all have about the same mass B. Unlike protons or neutrons, electrons have no mass C. Neutrons have no charge and no mass D.

A 331 N stoplight is hanging in equilibrium from cables as shown. The tension in the right cable is 550 N, and it makes an angle of 12 degrees with the horizontal.

94. The best predictor of outcome of rehabilitation for a traumatic brain injured client is. 2 The post-injury IQ b. The location of the injury within the brain C. The length of the coma d Family support

A student initially at rest on a frictionless frozen pond throws a 1 kg hammer in one direction. After the throw, the hammer moves off in one direction while the student moves off in the other direction.

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.

What does it mean when we say an atom has decayed?

If the mass of a material is 77 grams and the volume of the material is 19 cm3, what would the density of the material be

A bicyclist is in a 50-km race. She says she had an average velocity of 35. What is missing in the cyclist's velocity? A. units only B. units and distance C. direction only D. units and direction

Which one of the following statements concerning emf is true? A) Emf is the work done in moving the current from one terminal to the other of an emf device.

A fan is a complex machine? True or false?