A football travels 25 m in 2.5 seconds. What is the speed of the football?

A spherical hot-air balloon is initially filled with air at 120 kPa and 20°C with an initial diameter of 5 m. Air enters this balloon at 120 kPa and 20°C with a velocity of 3 m/s through a 1-m-diameter opening.

this refers to the process of manufacturing that introduced powered machinery to the production of goods

Imagine a glass box that is completely sealed and in that box is a cactus in a small pot which statement is most accurate? a. This is an open system because the light can go through the glass and get into the box b.

Select to show the energy of pendulum 1. Be sure that friction is set to none. Drag the pendulum to an angle (with respect to the vertical) of 30∘, and then release it. When the pendulum is at - 30∘, what form (s) of energy does it have?

All of the following activities produce quantitative data exept A. Measuring the rate of gas production from a chemical. B. Describing the clarity of water in a sample C. Calculating the energy released from an electrochemical reaction

An ambulance is traveling east at 51.6 m/s. Behind it there is a car traveling along the same direction at 32.3 m/s. The ambulance driver hears his siren at a frequency of 615 Hz. 32.3 m/s Car 51.

When a chemical reaction occurs with only one substance, what happens to the atoms of that substance?

Total energy input is 1400 and my efficiency is 80% so what is the useful energy output in jules?

Which group of elements loses 1 electron easily?

What evidence can you cite for the particle nature of light? 1. Refraction phenomenon of light 2. The many colors of light 3. Diffraction phenomenon of light