Rutherford was the first to hypothesize that electrons orbit a positively charged nucleus a. true b. false

You are riding a bicycle. You apply a forward forceof 50 N, and you and the bicycle have a combined mass of 100 kg. What is the acceleration of the bicycle?

Which of the following is true for catalysis of a reaction by an enzyme? Group of answer choices a. The equilibrium constant decreases b. The initial velocity decreases c. The standard free energy of the reaction increases d.

An electronic balance shows the mass of a sample of sodium chloride to be 29.732 g. what is the uncertainty of the measurement

Which of the following is a form of mechanical energy? A. Chemical energy B. Kinetic energy C. Nuclear energy D. Thermal energy

A 49.5 gram super ball traveling at 25.5 m/s bounces off a brick wall and rebounds at 19.5 m/s. a high-speed camera records this event. if the ball is in contact with the wall for 4.

How are magnetic stripes near mid-ocean ridges evidence for sea-floor spreading?

If a truck has a mass of 2 x 106 grams and a velocity of 35m/s, what is its momentum? kgm/s a. 2 million b. 70 c. 57.14 d. 70,000 e. 57,100

A scientist heats a piece of iron until it is glowing white-hot. he places the metal inside a metal box. he removes all of the air from the inside of the box.

Johanna is studying what happens to the energy as a ball rolls down a ramp. What is she studying? Check all that apply. 1. gravitational potential energy 2. electrical energy 3. kinetic energy 4. mechanical energy 5. elastic potential energy

The density of sugar is 1.59 g/cm3. the mass of a sample is 4.0 g. find the volume of the sample