Which type of friction prevents a pile of rocks from falling apart?

Rolling friction

Kinetic friction

Cohesive friction

Static friction

The mass of a stroller and the child it carries is 21.1 kg. A woman pushes the stroller with a force of 121 N at an angle of 41.0° to the vertical. The stroller experiences a friction force of 4.0 N. What is the stroller's acceleration forward?

An object of the same mass has three different weights at different times. Which statement is possible? • The object gains matter and then loses it.

In very general terms, how do the temperature structures of the atmospheres of venus and mars differ from that of earth?

What are examples of devices that use electromagnetic waves? Check all that apply.

Displacement is the change in velocity of an object. a. True b. False

What are the relationships of the different types of matter, mass, and the change in the average kinetic energy of particles?

A steamboat moves with velocity components of 6 km/hr along the x direction and 8 km/hr along the y direction. what is the direction of the steamboat with respect to the x axis?

What are 3 ways scientists can take to reduce bias?

A water heater is operated by solar power. If the solar collector has an area of 6.39 m2, and the intensity delivered by sunlight is 550 W/m2, how long does it take to increase the temperature of 1.00 m3 of water from 19.4∘C to 72.1 ∘C?

Which of the following factors will negatively impact the rate of diffusion of a molecule? A short distance between two concentrations of the molecule A low difference in the concentration of the molecule across the media A warm environment