There are 8 elements that together make up 98.5% of earth crust oxygen 46.6% aluminum 8.1% iron 5.0% calcium 3.6% sodium 2.8% potassium 2.6% magnesium 2.1% and silicon what percentage of earth crust is silicon

Four unequal resistors are connected in a series circuit. Which one of the following statements is correct about this circuit? The total resistance is equal to average of the four resistors. The total resistance is less than the smallest resistor.

Why is it more difficult to do a sit up with your hands behind your head than when your arms are stretched out in front of you?

How much heat is needed to raise the temperature of 6g of water by 19oC?

Which statement below could be used as evidence to support the claim that using nuclear energy to produce electricity is better than using fossil fuels?

Wire A has resistance of 3.0 Ω. Wire B has resistance of 2.5 Ω. Both wires have the same current. Which wire has greater voltage

The linear, step wise representation of the process of science from the traditional scientific method, while simplified, does capture the core logic of science: testing ideas with evidence. 1.) True 2.) False

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.