Two liquids are mixed and bubbles form. Is this a chemical or physical change? Explain.

Suppose you are carrying a ball and running at constant speed, and wish to throw the ball and catch it as it comes back down.

A large punch bowl holds 3.35 kg of lemonade (which is essentially water) at 20.0° C. A 1.62-kg ice cube at. - 10.2°. C is placed in the lemonade.

Some small aluminium rivets of total mass 170g and at 100°C are emptied into a hole in a large block of ice at 0°C a What will be the final temperature of the rivets? b How much ice will melt?

You push down on a 3 N Box for 10 minutes. How much work was done?

Students who participated in an optimism workshop: O A. had fewer episodes of depression. O B. had fewer health problems. O C. All of these O D. had fewer episodes of anxiety.

Two friends, barbara and neil, are out rollerblading. with respect to the ground, barbara is skating due south at a speed of 5.9 m/s. neil is in front of her. with respect to the ground, neil is skating due west at a speed of 1.4 m/s.

What process is used when the sun transfers light to plants A. conduction B. radiation C. convection D. all of these

Which wave characteristic has the unit hertz

A stretched spring has 5184 J of elastic potential energy and a spring constant of 16,200 N/m. What is the displacement of the spring?

A block of mass 1.3 kg is resting at the base of a frictionless ramp. A bullet of mass 50 g is traveling parallel to the ramp surface at 250 m/s. It collides with the block, enters it, and exits the other side at 100 m/s.