A block of iron of volume 50 cm has a mass of 390 g. what is the density of iron

How can a person detect infrared rays without an instrument?

There are four groups of stars on the H-R diagram about 90% of the stars are in the?

How is the acceleration of an object in uniform circular motion constant? A. in magnitude only B. in direction only C. in both magnitude and direction D. in magnitude, direction, and orientation

The lava lamp has a light bulb as a heat source at its base. The lamp contains a colored, waxy fluid that can be observed moving in clumps through a clear liquid.

An elevator is initially moving upward at a speed of 12.00 m/s. the elevator experiences a constant downward acceleration of magnitude 4.00 m/s2 for 3.00 s. (a) find the magnitude and direction of the elevator's final velocity.

Do you think an observer on another planet in the solar system might see eclipses

A. A vector is any element of a vector space. Is this statement true or false? A. True by the definition of a vector space B. False; not all vectors are elements of a vector space. C. False; a vector space is any element of a vector.

19 Which gas is the most abundant greenhouse gas? A. ozone B. chlorofluorocarbon C. carbon dioxide OD. methane E. water vapor Reset Next

The plates of a parallel-plate capacitor are maintained with a constant voltage by a battery as they are pushed together, without touching. How is the amount of charge on the plates affected during this process? a.

Which of the following creates a longitudinal wave? A. striking a gong B. turning on a flashlight C. shaking a rope up and down D. dropping a stone into a pond