What is the efficiency of a device that gives you 10 units of useful energy for every 100 units you put in it?

A. 1

B. 0.5 What is the efficiency of a device that gives you 10 units of useful energy for every 100 units you put in it?

A. 1

B. 0.5

Identify the techniques used to try to locate extra solar (exo) planets A) transits B) doppler technique C) spectral detection D) gamma cepheid

The radius of a niobium atom is 131 pm. how many niobium atoms would have to be laid side by side to span a distance of 2.40 mm

What are the 12 colors of the spectrum called?

Alice suffered a minor electrical shock as she switched on her bathroom light. She is concerned and wants to prevent it from happening again. What should Alice do to prevent getting an electrical shock again?

A microwave oven operates at 2.00 ghz. what is the wavelength of the radiation produced by this appliance? express the wavelength numerically in nanometers.

A projectile is thrown upward so that its distance above the ground after t seconds is h (t) equals negative 16 t squared plus 704 t. a) Find the maximum height the object reaches. b) Find the time it takes the object to reach the ground.

You are standing 100 meters from an object emitting a sound of constant intensity (loudness). You walk toward the source of sound until you are 20 meters from it. From your perspective, what has happened to the intensity of the sound?

What is the peak emf generated by a 0.250 m radius, 500-turn coil is rotated one-fourth of a revolution in 4.17 ms, originally having its plane perpendicular to a uniform magnetic field. (This is 60 rev/s.)

How do credit cards use magnets to work?

Which of the following describes a physical change? A. Formation of a new substance caused by combining substances B. Water changing from liquid to gas through evaporation or boiling C. Formation of a new substance caused by application of heat