A ring made of gold is heated and then hammered into a flat, coin-like shape. Is this a physical change? Explain.

You're making a food safety mistake if you A. thaw food in the fridge instead of on the counter. B. don't wash meat or poultry. C. overcook meat, poultry, seafood, or eggs. D. let food cool before putting it in the fridge not b

15. The frequency of a wave is measured in which of the following units?

Clara is shopping in a grocery store with her friend. Each has their own shopping cart in which they want to place their items. The shopping carts are identical. Clara and her friend add the same type and number of items to each of their carts.

Quantum effects can be seen at the atomic and nano levels. Why is nanotechnology more useful than atomic technology for creating new products? It is too small for dangerous quantum effects to apply. It is too large for most quantum effects to apply.

In your own words, describe the Doppler effect. Be sure to give at least one example of the Doppler effect.

When NASA's Skylab reentered the Earth's atmosphere on July 11, 1979, it broke into a myriad of pieces. One of the largest fragments was a 1770-kg lead-lined film vault, and it landed with an estimated speed of 120 m/s.?

A spring gains 2.34 joules of elastic potential energy as it is compressed 0.250 meter from its equilibrium position. What is the spring constant of this spring? (1) 9.36 N/m (3) 37.4 N/m (2) 18.7 N/m (4) 74.9 N/m

Form hypothesis: Where do you think we humans get energy?

The distance from home plate to the pitchers mound is 18.5 meters. For a pitcher capable of throwing at 3.85m/s (86mi/hr), how much time elapses between the release of the ball and the ball passing home plate?

A squirrel sitting on the ground starts to run with an acceleration of 5.1 m/s 2. How fast is the squirrel going after 0.25 seconds? A. 20.4 m/s B. 1.28 m/s C. 0.49 m/s D. 3.1 m/s