The spring constant, k, for a 22cm spring is 50N/m. A force is used to stretch the spring and when it is measured again it is 32cm long. Work out the size of this force.

What are the disadvantages of friction?

1. a spring has an extenson of 4 cm when a weight of 0.5 N hangs from it. calculate the extension when a weight of 0.75 N hangs from it?

Which of the following best defines volume? the amount of matter in a substance the shape of a sample of matter the amount of space that a sample of matter takes up the way that a substances atoms are arranged Wood is considered a good insulator

Which of the following statements about Ohm's Law is true? A. Increasing the voltage decreases current. B. Keeping the same voltage and decreasing resistance decreases the current. D. To increase the current, decrease the resistance.

When a ball increases in speed by the same amount each second its acceleration?

A large body of air hats has similar properties of a temperature and moisture is a

An ice rink is 200 feet long and 85 feet wide. The four corners of the rink are rounded to a radius of 24 feet. What is the surface area of the rink? Round the answer to the nearest square foot.

Which statement is correct about gasoline when it is burned? Heat energy is created by the gasoline. The total energy of the gasoline decreases. Chemical energy in the gasoline is destroyed. Chemical energy is transformed into heat energy.

The tilt of the Earth's axis of rotation changes over a period of 41,000 years. Which of these statements best predicts a long term effect of the changes in the tilt of the Earth's axis of rotation? a. The Earth's climate would change. b.

What do keratinized cells form?