Determine the mechanical energy of this object; a 1-kj ball rolls on the ground at 2m/s

a. the ball is on the ground, so the mechanical energy is zero

b. 2j

c. 1j

d. 4j

if the same base pairs are used to code for all organisms why is there so much variation among organisms

The current in a hair dryer measures 11 amps. The resistance of the hair dryer is 15 ohms. What is the voltage? Your Answer: Question 12 options: Answer: units:

The specific heat of copper is 0.385 J/g·°C. What equation would you use to calculate the amount of heat needed to raise the temperature of 0.90 g of copper from 9°C to 26°C?

What is the advantage of having different shaped beaks? Question 4 options: To protect itself against prey. To be able to eat the food readily available in the environment. To look different from other species. To protect itself against predators.

Define the term Hysteresis

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