Sarah roller skates 18.5km in 3 1/2 hours. what is her average speed in kilo per hour?

When a block with a hole in it is heated why does not the material around the hole expand into the hole and make it small

What is a galaxy? How many galaxies are there and how many stars does each galaxy hold?

Read the scenario. A horse accelerates + 2 mi/h/s south. Which option defines the horse's acceleration? A. The horse's speed changes to 2 mi/h as the horse moves south. B. The horse's speed decreases by 2 mi/h every 1 s. C.

The floor of the room is cooler than the ceiling. explain this based on air currents in the room.

You're a production engineer in a cookie factory, where mounds of dough drop vertically onto a conveyor belt at the rate of one 12-g mound every 2s. You're asked to design a mechanism that will keep the conveyor belt moving at a constant 50cm/s.

The Burj Khalifa in Dubai is the tallest building in the world at about 828 m. A daredevil climbs to the top of the building and sees the the Boulevard Plaza 2 (141 m tall) about 300 m away.

Suppose the initial position of an object is zero, the starting velocity is 3 m/s and the final velocity was 10 m/s. The object moves with constant acceleration. Which part of a velocity bs.

Identify which type of scientist would use spectroscopy for each purpose. Identification of the composition of the sun and stars: Determination of chemical bonds: Prediction of the efficiency of possible laser materials: Identification of harmful

The distance a wave moves from resting position

Which of the advantages to social media as a new media could also be viewed as a disadvantage