An alternating current in a wire has a voltage of 2,800 V. It needs to be reduced 70 V. The wire makes 120 turns in the primary coil of a step - down transformation. How many turns of wire need to be in the secondary coil?

A jet fighter performs a horizontal circular turn of radius 1410. The jet is travelling at a constant speed of 235 m/s and has mass 14332. What is the magnitude of the centripetal force experienced by the pilot?

The magnitude of the force involved in a certain collision (measured in newtons) is equal to the change in momentum (measured in kilogram meters/second). What is the time interval of the collision? A. 1.0 second B. 0.5 seconds C 2.0 seconds D. 2.

How many neutrons does element X have if its atomic number is 48 and its mass number is 167?

The centers of two15.0-kilogram spheres are separated by 3.00 meters. The magnitude of the gravitational force between the two spheres is approximately?

Planet with an atmosphere that rains sulfuric acid

Two abiotic factor that effect an ecosystem are;

Which of the following is explained by general relativity? A. How massive stellar objects can form a lens. B. Why moving muons decay more slowly than stationary ones C. Why atomic clocks tick more slowly when in motion D.

Imagine that you're observing a collision. Which action would allow you to determine whether the collision is inelastic? A. Measure the force of impact. B. Observe whether the colliding objects change their shape. C.

When compared to other types of waves, electromagnetic waves differ because they are Select one: A. a form of energy. B. able to travel through a vacuum. C. all visible. D. able to move particles in a medium.

The velocity selector in in a mass spectrometer consists of a uniform magnetic field oriented at 90 degrees to a uniform electric field so that a charge particle entering the region perpendicular to both fields will experience an electric force and