Which of the following pieces of technology expand the sense of sight

Two eagles fly directly toward one another, the first at 15.0 m/s and the second at 21.0 m/s. both screech, the first one emitting a frequency of 2800 hz and the second one emitting a frequency of 3800 hz.

A diesel engine performs 2100 J of mechanical work and discards 4500 J of heat each cycle. Part A) How much heat must be supplied to the engine in each cycle? Part B) What is the thermal efficiency of the engine?

If a black hole is truly black and has an escape velocity greater than the speed of light such that no light can escape it, where do the X-rays come from in the black hole candidates so far identified?

A well-insulated electric water heater warms 131 kg of water from 20.0°C to 51.0°C in 31.0 min. Find the resistance (in Ω) of its heating element, which is connected across a 240 V potential difference. 6.34 Correct: Your answer is correct.

Gneiss is a metamorphic rock that is formed when granite is subjected to extreme heat and pressure. This occurs in when: shallow seas evaporate mountains collide fossil sediments form layers magma cools and hardens underground

What is 6.9*10to the 7th power

Un lote de construcción rectangular mide 100 metros por 150 metros. Calcula el área de este lote en yardas cuadradas. (20 puntos)

4. The place on a magnet where the magnet exerts the strongest magnetic force is the magnetic A. pole. B. force. C. domain.

A motorcycle is capable of accelerating at 5.1 m/s2. Starting from rest, how far can it travel in 1.5 seconds? A. 3.8 m B. 4.5 m C. 3.2 m D. 5.7 m

If a car goes along a straight road heading east and speeds up from 45 ft/s to 60. ft/s in 5 sec, calculate the acceleration