If steel is more dense that lake water, why can a boat float

How does the nervous system allow you to run

During physical activity of high intensity, your heart will beat at a percentage of its maximum rate. Whi this type of activity? A. 40%-50% 50%-70% O 70%-85% D. 85%-100%

The first law of thermodynamics states that energy transforms matter in different ways by creating and destroying it. A. True B. False

a 1 kg emery stone measuring 20 cm redium, is rotating with an angular speed of 39 revolutions per minute, when the motor is turned off. What tangent force is applied to the wheel so that it stops at 10 revolutions. a. Answer: 12,24 Rand/s b.

What is a carbon whip?

A stunt car with a mass of 1000 kg crashes into a tree on a movie set during the collision acceleration of the car with 3 m what was the force of impact of the collision on the car

A circuit with a current of 400 amp has several lights that have a total resistance equal to 30 ohms. Find the voltage.

How many neutrons does element x have if it's atomic number is 35 and it's mass number 71

The potential difference between the terminal of an electrical heater is 60v when it draw a current 4A fron the source. What current will the heater draw if the potential difference is increased to 120v?

Which answer choice best explains why nuclear reactions release more energy than chemical reactions? Electrostatic forces of repulsion are thousands of times stronger than gravitational forces.