Social networks have clear boundaries.

4. An electric toaster is rated at 500 watts. Determine the amount of electrical energy it converts to heat energy in one minute. 80.3 J B) 500 J C) 3,000 J D) 30,000 J

What could not act as a medium for a mechanical wave

What is the wavelength in nm of a light whose first order bright band forms a diffraction angle of 19.0°, and the diffraction grating has 600.0 lines per mm?

When there are more coils added to the wire of an electromagnet what happens to the magnetic field? A) The magnetic field increases B) The magnetic field decreases C) The magnetic field varies D) The magnetic field stays the same.

Which of the following is the best example of potential energy? a ball sitting at the top of a hill a ball sitting at the bottom of a hill a ball rolling down a hill

How does the mass of an astronaut change when she travels from earth to the moon? how does her weight change?

If an object has a mass of 20 grams and a volume of 40 cm3, what is its density in g/cm3?

Discuss how systematic and random errors influence the precision and accuracy of an experiment.

Matthew rolls a bowling ball with a speed of 2 meters/second. The ball hits the pins with 1.8 joules of kinetic energy. The mass of the bowling ball is kilograms. NextReset

Many schools require freshmen to live