What does electromagnetic move at the speed of

Which of the following are features of the nucleus of an atom?

A sodium ion has 11 protons and 10 electrons. what is its charge?

John traveled East at 10 m/s for ten seconds. He realized he had gone too far and made a U-turn. He traveled West at 5 m/s for six seconds. Calculate John's displacement. a. 30 m b. 70 m C. 100 m d. 130 m

While John is traveling along a straight interstate highway, he notices that the mile marker reads 249 km. John travels until he reaches the 141 km marker and then retraces his path to the 174 km marker.

What is the lowest and highest mass the triple beam balance can measure

What will happen to plant height if the amount of available light is reduced due to global dimming? Which type of investigation would most likely be conducted to answer the following question?

A machine has an efficiency of 80%. How much work must be done on the machine so to make it do 50,000 J of output work?

What is the name of the area surrounding earth that is influenced by earth's magnetic field?

A 15 g turntable is covered with a uniform layer of dry ice that has a mass of 9.0 g. The angular speed of the turntable and dry ice is initially 0.75 rad/s. What is the angular speed of the turntable once all the dry ice has evaporated?

Rainwater was collected in water collectors at thirty different sites near an industrial basin and the amount of acidity (pH level) was measured. The mean and standard deviation of the values are 4.60 and 1.10 respectively.