A 40 kg mass is dropped from a tall rooftop and accelerates at 9.8 m/s2

. What is the weight of

the dropped object?

A) 392 N

B) 9.8 N

C) 40 N

D) 0 N

Complete the passage to explain how the first law of thermodynamics describes what happens to heat added to or absorbed by a system. The first law of thermodynamics describes how the heat added to a system is conserved.

What is newtons second law in terms of momemtum

One situation indicates a physical change rather than a chemical change. Which situation indicates a physical change? A) Solid copper melts to form liquid copper. B) A firecracker explodes on the fourth of July.

The reflection of a 10.0 cm object appears to be 18 cm tall and 9 cm behind the mirror. What distance is the object from the mirror?

Hurry!1 give me a paragraph on friction include examples of friction

What effect does an unbalanced force have on an object?

How long does it take to drive 2376 miles at 65mph?

Most earthquakes are produced by the rapid release of which kind of energy stored in rock subjected to great forces? a. kinetic b. thermal c. elastic d. mechanica

Liam is two-years old. His mother is concerned about his behavior. Liam is very different from how his sister Briana was when she was his age. He does not make eye contact. When she smiles at him, he doesn't smile back.

550 g of water at 105°C is poured into an 855 g aluminum container with an initial temperature of 11°C. The specific heat of aluminum is 900 J / (kg K).