Two carts with masses of 4.32 kg and 2.66 kg move toward each other on a frictionless track with speeds of 4.86 m/s and 3.93 m/s respectively. The carts stick together after colliding head-on. Find the final speed.

How much heat is needed to raise the temperature of 1 kg of iron from 25°C to 30°C?

Question 1 Unsaved Most of the mass of the solar system is located in which of the following? Question 1 options: Earth comets sun Jupiter

Choose the false statement concerning parallel circuits. a. The voltage across each branch of the circuit is the same. b. Current can vary in different branches of a circuit depending on the resistance in those branches. c.

Term Definition Match the correct term to the right definition Elliptical galaxy A) Forms a perfect sphere or an ellipse and is flattened to some degree Irregular galaxy B) Has a large flattened core Lens galaxy C) Does not have a distinct regular

An astronaut goes to Mars to do some experiments. Explain why her mass stays the same but her weight changes.

The mass of the Sun is 1.99 * 1030 kg. Jupiter is 7.79 * 108 km away from the Sun and has a mass of 1.90 * 1027 kg. The gravitational force between the Sun and Jupiter to three significant figures is * 1023 N.

You measure the magnetic field of a long, current-carrying wire to be B is equal to start fraction 50 times mu naught over pi end fraction at a distance of r = 7.5 cm. How much current is running through the wire?

In any food chain or web, the original source of energy is

Which organisms develop gills from pharyngeal arches and later develop lungs to breathe on land

How much energy (in joules) is required to evaporate 0.0005 kg of liquid ammonia to vapor at the same temperature?