Select the correct answer.

If a president believes that emergency conditions require a quick decision regarding an agreement with another country, which tool allows him

to make a decision without Senate approval?

A cube of wood is floating on water. A cube of iron is totally submerged in water. The cubes are equal in volume. Which cube has the greater buoyant force acting on it? a. The buoyant force cannot be determined without additional information. b.

A parent pushes a stroller with a 11.2 N force for 15.9 m. How much work did the parent do?

If the primary of a transformer were connected to a dc power source, A. the transformer would have a voltage output the same as its input. B. at a higher efficiency than with an ac source. C. that is also dc. D.

A boy in a pedal car is moving at a speed of 1.40 m/s at the start of a 2.00 m high and 12.4 m long incline. The total mass is 45.5 kg, air resistance and rolling resistance can be modeled as a constant friction force of 41.

What is the force required to produce a 1.4 Nm torque when applied to a door at a 60.0º angle and 0.40 m from the hinge?

What are the requirements of a practical fuel

A woman holds a book by placing it between her hands such that she presses at right angles to the front and back covers. The book has a mass of m = 1.7 kg and the coefficient of static friction between her hand and the book is μs = 0.52.

Tony has a mass of 50 kg, and his friend Sam has a mass of 45 kg. Assume that both friends push off on their rollerblades with the same force. Explain which boy will have greater acceleration.

Which part of your ear do sound waves enter through?

Why do scientist use different types of models to represent compounds