Does the temperature of a material always increase as it is heated? Explain briefly.

What causes resistance in an electric current? how is resistance measured

steposvetlana [31]

resistance is measured by ohms and when electrons move through a conductor they collide with ions in the material which produces resistance hope this helps

4 0

3 years ago

The body is subjected to a force of 0,4 N m with a shoulder of 5 cm. What is the magnitude of this force?

igor_vitrenko [27]

Answer:

8N

Explanation:

the body is subjected to pressure equals to force force inverse to the area of that body given that it is in motion

5 0

3 years ago

Un'automobile di 1200 kg rallenta,passando da una velocità di 130 km/h a una velocità di 70 km/h .

sesenic [268]

Answer:

e di 1200 kg rallenta,passando da una velocità di 130 km/h a una velocità di 70 km/h .

Quale è stato il lavoro compiute di 1200 kg rallenta,passando da una velocità di 130 km/h a una velocità di 70 km/h .

Quale è stato il lavoro compiut

Explanation:

e di 1200 kg rallenta,passando da una velocità di 130 km/h a una velocità di 70 km/h .

Quale è stato il lavoro compiute di 1200 kg rallenta,passando da una velocità di 130 km/h a una velocità di 70 km/h .

Quale è stato il lavoro compiut

3 0

3 years ago

When air resistance equals the weight of an object, the object has reached

MissTica

Answer:

When air resistance equals the weight of an object, the object has reached free fall.

Explanation:

When an object has only force acting on it as gravity then, it experiences free fall.
During free fall all the forces except gravity is balanced by one another.
In the question, object's weight is balanced by air resistance so it is in the state of free fall.
At the null point of free fall, object experiences weightlessness i.e. it feels like object is not attracted by any force.

6 0

3 years ago

A child drops a ball from a window. The ball strikes the ground in 3.0 seconds. What is the velocity ofthe ball the instant befo

Sergeeva-Olga [200]

Answer: The velocity of the ball is 30.0 m/s

This can be calculated by using the value of acceleration as 10.0 m/s2 in free fall and the given time of 3.0 seconds. To get the velocity, one will have to multiply the acceleration with the given time and the quotient would result to 30.0 m/s. Mostly all object regardless of their mass, fall to earth with the same acceleration in the absence of air resistance and as the child drops the ball from a window, it gains speed as it falls.

5 0

3 years ago