A current of 4.7A is drawn by a laptop with a power output of 90W. What size voltage should the charger for the laptop provide?

Click the Run Now button to start the simulations. Select "Many rays" and click the Screen checkbox. You should see a lamp and a black screen. a. Examine the light rays that are emerging from the lamp.

How much heat energy, in kilojoules, is required to convert 46.0 gg of ice at - -18.0 ∘C∘C to water at 25.0 ∘C∘C?

Newton's first law states that an object in motion tends to. An object a rest tends to

The density of the object on the left is 1.5 g/cm3 and the density of the fluid is 1.0 g/cm3. Which has greater density? The object will in the water column.

Here's a great everyday use of the physics described in this chapter. If you are trying to get ketchup out of the bottle, the best way to do it is to turn the bottle upside down and give the bottle a sharp upward smack, forcing the bottle rapidly

You measure the magnetic field of a long, current-carrying wire to be B is equal to start fraction 50 times mu naught over pi end fraction at a distance of r = 7.5 cm. How much current is running through the wire?

In any food chain or web, the original source of energy is

Which organisms develop gills from pharyngeal arches and later develop lungs to breathe on land

How much energy (in joules) is required to evaporate 0.0005 kg of liquid ammonia to vapor at the same temperature?

It is 5.5 km from your home to the physics lab. As part of your physical fitness program, you could run that distance at 10 km/h (which uses up energy at the rate of 700 W), or you could walk it leisurely at 3.0 km/h (which uses energy at 290 W).