A spherical balloon has a diameter of 10 ft. The average specific volume of the air inside is 15.1 ft3 / lb. Determine the weight of the air, in lbf, at a location where the gravitational acceleration is 31.0 ft/sec2

How much potential energy does a 10-N baseball gain when it is lifted 10 m? 1,000 J 100 J 20 J 200 J

Potassium-40 has a half-life of 1.3 billion years. As the potassium-40 isotope decays, it becomes argon. If a rock was formed with 12 g of potassium-40, approximately how long would it take for 75% of the potassium-40 to be replaced by argon?

How many horsepower does a 1100 watt microwave have

What is the surface temperature of a distant star having a peak wavelength of 475 nm?

Monochromatic light is incident on a grating that is 75 mm wide and ruled with 50,000 lines. The second-order maximum is seen at 32.5°. What is the wavelength of the incident light? 202 nm 605 nm 806 nm 403 nm 452 nm

Bernie drove home from a vacation in 1.5 hours. He traveled a total distance of 60 miles. What was his average speed in miles per hour

What advice a personal trainer most likely give u before a workout

An elevator supported by a single cable descends a shaft at a constant speed. The only forces acting on the elevator are the tension in the cable and the gravity. Which one of the following statements is correct? Group of answer choices A.

If the acceleration of a moving object is zero, which of the following best describes its motion

Calculate mass During a softball game a softball is struck by a bat and has an acceleration of 1,500 kg. If the net force force exerted on the softball by the bat is 300 N, what is the softballs mass.