A clear echo is heard within 0.2 seconds when a person shouts by sitting at the ridge of a hill. Calculate the velocity of sound in air. The distance between the person and the hill is 33.2 m

I am planning to make two dives. The first dive is to 60 feet for 45 minutes, and the second dive is to 60 feet for 35 minutes. How long would I have to stay on the surface (minimum surface interval) to do these two dives safely?

A neutral copper ball is suspended by a string. a positively charged insulating rod is placed near the ball, which is observed to be attracted to the rod. why is this? 1. the ball becomes positively charged by induction. 2.

A hot water heater is operated by using solar power. if the solar collector has an area of 5.3 m2, and the power delivered by sunlight is 995 w/m2, how long will it take to increase the temperature of 1 m3 of water from 20 ◦c to 65 ◦c?

A small, dense center that has a positive charge and is surrounded by moving electrons

A car traveling at 37 m/s starts to decelerate steadily. It comes to a complete stop in 6 seconds. what is its acceleration? m/s

How do evaporation and condensation relate to heat

Resistance = 0.1 ohm Current = 60 amps Voltage = ? 0.6 6 60 600

The velocity of a roller coaster as it moves down a hill is where v0 is the initial velocity and h is the vertical drop in feet. An engineer wants a new coaster to have a velocity of 90 feet per second when it reaches the bottom of the hill.

What are sun spots?

Identify characteristics of objective personality tests. -self-report -scientific -paper-and-pencil -questions about behavior -objective -potentially biased answers Multiple Choice-Psychology