an incandescent lightbulb has an efficiency of 2.1% and a power of 60 w. how much light energy does the lighbulb produce in 1 second

Which is greater, the mass of the compounds before a chemical reaction or the mass of the compounds after a chemical reaction? The mass of the compounds before is greater. The mass of the compounds after is greater.

What could be the plot of a story about planets / astronomy?

Examples of rotating and revolving objects and an objects that does both

A 1.5m wire carries a 6 A current when a potential difference of 70 V is applied. What is the resistance of the wire?

Determine the potential difference between two charged parallel plates that are 0.10 cm apart and have an electric field strength of 12 V/cm. V

List the types of radiation in order from least to most damaging.

Which of the following statements best describes the current state of understanding regarding the apparent acceleration of the expansion of the universe?

Should young people be allowed to do extreme sports? (give me two reasons why) 1. Opinion: 2. Reason why: 3. Reason why:

A light ray is incident on a reflecting surface. If the light ray makes a "35°" angle with respect to the normal to the surface, what is the exact angle (in degrees) made by the reflected ray relative to the normal?

Reimbursement means that a client is A. able to apply for healthcare insurance and refunded for a partial sum of the payment plan by the state. B.