A vacuum cleaner has an energy input of 6.5 kWh and an energy output of 5.8 kWh. The efficiency of the vacuum cleaner, to the nearest percentage, is

Researchers Paul Ekman and Wallace Friesen conducted facial recognition experiments to determine which of the following?

4. A racing car has a uniform acceleration of 4 m s - '2. What distance will it cover in 10 s after start?

How can one object affect the motion of another without touching it? Give a specific example.

Mateo makes a table of the symbols that represent the parts of an electric circuit. What label should Mateo place in the marked cell?

Mechanical energy often changes between potential and kinetic energy. True or False

As stream velocity decrease, which factor will likely increase? A) erosion of the stream bank B) deposition of material in the stream C) amount of material carried downstream D) size of the particles carried downstream

What cells in the nervous signals travel through the nervous system

A mechanic pushes a 3.60 ✕ 103-kg car from rest to a speed of v, doing 5,130 j of work in the process. during this time, the car moves 21.0 m. neglecting friction between car and road, find v and the horizontal force exerted on the car.

Anika asks Eva to roll a basketball and then a bowling ball to her. Which requires more force to roll, and why?

Why does a buoyant force act on every object in a fluid? Pressure pushing up on the bottom of the object is greater than the pressure pushing down on the top.