Explain why friction makes it harder to push a box filled with groceries than an empty box

What type of disorder is myasthenia gravis? A. Immune disorder B. Inflammatory disorder C. Structural disorder D. Infectious disorder

A cube measuring 2cm on each side weighs 5g. Will it sink or float?

Which planet is to humankind?

What happens to acceleration if your net force is large

you can produce a sound by plucking a string or by blowing into a pipe. how are these two sounds different

Which best blocks X-ray particles and can therefore be observed more closely through the use of this technology?

A light ray travels inside a horizontal plate of glass, striking its upper surface at an angle of incidence of 50°. This ray is totally internally reflected at the glass-air boundary. A liquid is then poured on top of the glass.

A stationary object has no forces acting on it. True False

April swims 50 m north and then turns and swims 20 m back to the south. What is her velocity if it takes her 60 seconds?

What happens to the mass of an object when it is cooled?