A object with a mass of 70 kilograms is supported at a height 8 meters above the ground. what's the potential energy of the object with respect to the ground

A compressor brings nitrogen from 100 kPa, 290 K to 2000 kPa. The process has a specific work input of 450 kJ / kg and the exit temperature is 450 K. Find the specific heat transfer using constant specific heats

A car travels 2.06 km in the x-direction, then turns left 70.5◦ to the original direction and travels an additional distance of 2.69 km. Calculate the x component of the car's net displacement.

Whish is a drawback of solar energy? A. It is a non renewable source B. It depends on the climate C. It is difficult to use for electricity D. It can be a source of water pollution

Why do predator repeatedly avoid prey that is red in color?

Suppose you want to build a house on the edge of a hill that overlooks a deep valley. what measures could you take to be sure your home will not have problems due to weathering or erosion

Which of the following equations correctly expresses the relation between vectors A⃗, B⃗, C⃗, and D⃗ shown in the figure?

Oliver, whose mass is 65 kg, and Olivia, whose mass is 45 kg, sit 2.0 m apart in the physics classroom. What is the force of gravitational attraction between Oliver and Olivia

Which is an application of radio waves? allow doctors to see inside a person's body carry information between cell phones sterilize surgical instruments reheat or cook food quickly and easily

In history class, Juan learned about two sets of limestone carvings left in similar caves approximately 5000 years ago. Both caves are damp, but one cave has an average temperature of 45°C, while the other cave has an average temperature of 70°C.

A school bus full of students drives down the road. Because it is moving, it has 1. potential energy because it has the ability to take the students to school. 2. kinetic energy because it has the ability to take the students to school. 3.