Is the following chemical equation balanced? 4Al + 3O2 2Al2O3 yes no

Solid state physics uses the. Theory to understand how the large-scale properties of solids result from their atomic scale struc

kondaur [170]

Answer:

Quantum theory

Explanation:

The scientific foundation in quantum mechanics is quantum theory, which describes the existence and behavior of mass and antimatter at the subatomic particles levels. Quantum theory and quantum theory are often related to as the existence and behavior of matter in the universe at that stage.

8 0

3 years ago

How is photon energy calculated? (choose 2)

raketka [301]

Using Placks’s constant and frequency

5 0

3 years ago

A car with mass mc = 1490 kg is traveling west through an intersection at a magnitude of velocity of vc = 9.5 m/s when a truck o

icang [17]

Answer:

v= - 4.507 i - 2.363 j

Explanation:

Given that

mc= 1490 kg

vc= 9.5 m/s ( - i)

mt= 1650 kg

vt = 6.4 m/s ( -j)

There is any external force so linear momentum will remain conserve.

Lets take final speed is v.

mc .vc + mt . vt = ( mc+mt) v

1490 x 9.5 ( - i) + 1650 x 6.4 ( -j) = ( 1490+1650) v

14,155 ( -i) + 10,560 ( - j) = 3140 v

v= - 4.507 i - 2.363 j

3 0

4 years ago

What is the shape of the orbit of satellites?

Rainbow [258]

All objects in orbit must follow the path of an ellipse (one of Keplers laws)

8 0

4 years ago

a flat bed truck is carrying a crate up a 10.0 hill inn the picture. the coefficent of the static friction between the truck bed

almond37 [142]

Answer:

$a = 0.711 m/s^2$

Explanation:

As we know that truck is moving up the hill

So here we have two forces on the crate placed on the truck

1) gravitational force along the floor

2) Friction force along the floor

Now here if the truck is moving with maximum possible acceleration so that there is no slipping of the crate

So here we will have

$\mu mg cos\theta - mgsin\theta = ma$

$a = \mu g cos\theta - g sin\theta$

$a = (0.25)(9.81)cos10 - 9.81 sin10$

$a = 0.711 m/s^2$

7 0

4 years ago