You have to use 4 N of force to lift a 36 N object with a lever. The lever has an effort arm of 45 m. What is the load arm length?

In the sound wave that is traveling from the guitar string to your ears, what is the distance between adjacent condensations? (For the speed of sound in air use the value, at 20 degrees Celsius, from the inside front cover of your textbook.)

The period of a 440 Hertz sound wave is __ seconds. 1/440 1/220 220 440

A total of 750 j of work was done when a force of 125 n was exerted on a box to move it. how far was the box moved?

The partial pressure of ethanol in the air above a sample of liquid ethanol in a closed container is 19.5 torr, at a given experimental Temperature. Assuming the pressure inside the container is 758.

What are the independent and dependent variables if kinetic energy

Which of these is not a source of the shock waves that lead to protostars?

Which kind of information is known about a person if that person's DNA is in a database? A. how old the person is B. where the person was probably born C. some diseases the person might have D. whether the person is likely to commit a crime

A science teacher ran a marathon. After the race she showed her students the silver blanket she was given to keep her warm. A group of students investigated how the colour of the blanket affected how much infrared radiation is absorbed

Students asked to measure the temperature of a reaction beaker recorded the following temperatures. 103.7°C, 108.4°C, 105.8°C, 104.6°C The actual temperature is 105.1°C. Which measurement is the most precise

Two atoms that are isotopes of one another must have a different number of what? electrons neutrons protons all particles