How many moles are there in one ounce (28.4g) of pure gold?

a. 1.97 x 10-2mol

b. 6.94mol

c. 0.144mol

d. 0.0721mol

e. 5.08 x 10-3 mol?

A driver of a car enters a new 110 km/h speed zone on the highway. the driver immediately begins to accelerate and reaches 110 km/h after driving 500 m. if the original speed was 80 km/h, what was the driver's acceleration?

What is the energy required to raise the temperature of 1 g of a substance by 1°c or 1 k?

A child drops a ball from a window. The ball strikes the ground in 3 seconds. What is the velocity of the ball the instant before it hits the ground?

2. A string with a length of 0.9m that is fixed at both ends a) What is the longest possible wavelength for the travelling waves that can interfere to form a standing wave on this string?

A wave with a period of 1⁄3 second has a frequency of A. 67 Hz. B. 33 Hz. C. 300 Hz. D. 3 Hz.

The position of an object is given by x = at3 - bt2 + ct, where a = 4.1 m/s3, b = 2.2 m/s2, c = 1.7 m/s, and x and t are in SI units. What is the instantaneous acceleration of the object when t = 4.1 s?

A 0.25 kg baseball is in contact with a bat for 0.0075 s and exerts a force of 18,500 N. What impulse is delivered to the ball?

What is the American psychology Association ethical principle of psychology and code of conduct based upon

What force keeps a water spider on the surface of water

A 5.0 kg object moving at 5.0 m/s. KE = mv2 times 1/2