A 3.8 kg object is lifted 12 meters. approximately how much work is performed during the lifting?

Smoke alarms only emit alpha radiation. Why is it important that it does not emit other radiation?

The electrons in a particle beam each have a kinetic energy K. What is the magnitude of the electric field that will stop these electrons in a distance d?

Which of the following changes on different celestial objects due to the force of gravity? A. weight B. mass C. all of the above D. how much matter an object is made up of

What is the concentration of OH - ions at a pH = 6?

Explain how density differs from volume.

Why do responsible consumers use credit and credit cards?

According to Ptolemy's model of the movement of celestial bodies, A. the sun is the center of the universe. B. the earth rotates around the moon. C. planets orbit in circular paths around the earth. D. the earth rotates around the sun.

What is an organ that has villi to absorb the nutrients

Assume you are a Medieval knight attacking a castle with a cannon. The ball leaves the cannon with a speed of 47.7 m/s. The barrel's angle with respect to the ground is 43.

0.005 kg of copper was heated from 20°C to 80°C. How much energy was used to eat Cu? (Specific heat capacity of Cu is 385 J/kg °C)