Natural selection would not take place without what?

how many joules of heay are needed to raise the temperature of 10.0 g of aluminum from 22°c to 55°c, if the specific heat of aluminium is 0.90J/g°c

A 95 kilogram student climbs 4.0 meters up a rope in 3.0 seconds. what is the power output of the student? a. 1.3 x 10^2 w

What do you do, when you get anger?

At the outer edge of a rotating space habitat, 130 m from the center, the rotational acceleration is g.

Two rooms are in contact. One is at 15°C and the other at 21°C. Choose the best statement concerning the heat flow. a) Heat will flow from the 21°C room to the 15°C room. b) Heat will flow from the 15°C room to the 21°C room.

Most arson fires are produced through what? Accelerants Dynamite Chemical residues Steroids

A block with mass m1 = 9.4 kg is on an incline with an angle θ = 25° with respect to the horizontal. For the first question there is no friction, but for the rest of this problem the coefficients of friction are: μk = 0.22 and μs = 0.242.

When an electric current flows through a wire a magnetic field is created. To increase the power of the magnetic field you would A.

When Holly injures her shoulder playing baseball, she uses an instant ice pack to reduce the swelling. She breaks the inner, activator portion of the instant cold pack releasing the solid urea into the surrounding water.

Zach is making a round trip going from home to work. To get to her work she goes 30 m/s and then to get back home she goes 50 m/s. What is the velocityof Zach for the entire round trip? a. 0 m/s b.-20 m/s c. 80 m/s