A 30w light bulb uses 600J of electrical energy in a certain period of time. In that time, it produces 450 J of light energy. The rest of the energy is wasted calculate the efficiency of the light bulb

What group does paracetamol come under

Does air resistance increase or decrease the acceleration of a falling object

According to the law of conservation of mass does the total number of atoms change during aerobic respiration

A small gray kitten showed up at Lynn's house. Her mother told her she could keep it, so she checked the cabinets and refrigerator for food. She found some tuna and fed the kitten.

An electric heating element has a resistance of 16 Ω and is connected to a voltage of 120 V. How much current will flow in this circuit? a) I=E/Rb) I=120/16c) I=7.5 A

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.

Meg runs a 10km race in 45 minutes (0.75 hours). What was her speed in kilometers per hour? a. 22 km/hr b. 7.5 km/hr c. 4.5 km/hr d. 13 km/hr

If you are an astronaut slowly drifting away from the space station, you might be able to drift back to the station by throwing a 555-kg tool rapidly in the direction that you are traveling (away from the station) A. False B. True C. Don't ask me D.

The loss of an electron from a neutral helium atom results in