An r-selected species typically

As a youngster, you drive a nail in the trunk of a young tree that is 5 meters tall. The nail is about 1.5 meters from the ground. Fifteen years later, you return and discover that the tree has grown to a height of 30 meters. About how many meters above the ground is the nail?

If A denotes the area of the sector of a circle of radius r formed by the central angle θ, find the missing quantity. If necessary, round the answer to two decimal places.r = 17 feet, A = 39 square feet, θ = ?

Convert the angle to a decimal in degrees. Round the answer to two decimal places.88°32’52”

If s denotes the length of the arc of a circle of radius r subtended by a central angle θ, find the missing quantity.r = 23.24 centimeters, θ = 5.8 radians, s = ?

Particle separators are used to separate particles by which of the following: 

To date, which have been the main biological components of BioMEMS? 

When a 45.0 g sample of an alloy at 100.0 °C is dropped into 100.0 g of water at 25.0 °C, the final temperature is 37.0 °C. What is the specific heat of the alloy?    The specific heat of H2O(l) is 4.184 J·g–1·°C–1. Data sheet and Periodic Table

The molar enthalpy of formation for H2O(l) is –285.8 kJ·mol–1.  Which expression describes the enthalpy change for the reaction: 2H2O(l)2H2(g) + O2(g)                ΔH° = ?   Data sheet and Periodic Table

What is the final temperature when a 5.0 g sample of brass initially at 25 oC absorbs 75 J of heat?  The specific heat of brass is 0.38 J·g–1·°C–1.   Data sheet and Periodic Table