4 years ago

What is the relationship between earths spheres and matter?

1 answer:

5 0

<span>Don't know what you mean by Earths Spheres. The Earth is a sphere -- singular. And it is made up of LOTS of matter</span>

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In physical science lab, Ben and Jerry added small pieces of magnesium to hydrochloric acid. They noticed that bubbles formed, t

svetoff [14.1K]

The signs of a chemical reaction are bubbles, heat an magnesium disappearing.

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4 years ago

A movie stunt performer is filming a scene where he swings across a river on a vine. The safety crew must use a vine with enough

Julli [10]

Answer:

1125.66956 N

Explanation:

m = Mass of stunt performer

g = Acceleration due to gravity = 9.81 m/s²

v = Velocity of the swing = 7 m/s

T = Tension

r = Radius of the swing = Length of vine = 11.5 m

From the free body diagram

$T-mg-m\frac{v^2}{r}=0\\\Rightarrow T=mg+m\frac{v^2}{r}\\\Rightarrow T=m(g+\frac{v^2}{r})\\\Rightarrow T=80(9.81+\frac{7^2}{11.5})\\\Rightarrow T=1125.66956\ N$

The minimum tension force the vine must be able to support without breaking is 1125.66956 N

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3 years ago

a soccer player kicks a ball with a speed of 30 m/s at an angle of 10. how long does the ball stay in the air?

Brut [27]

3.763 seconds I think

4 0

4 years ago

Read 2 more answers

Which elements are most likely to donate one electron?

Andrej [43]

Cesium has the least ionization energy and can donate electrons very easily !

6 0

3 years ago

Dean is hunting in the Northwest Territories at a location where earths magnetic field is 7.0x10^-5T. He shoots by mistake at a

velikii [3]

The magnetic force acting on an object of charge q is
$F=qvB \sin \theta$
where
q is the charge
v is the speed of the object
B is the magnetic field intensity
$\theta$ is the angle between the directions of v and B.

In our problem, the direction of the bullet is perpendicular to the magnetic field, so $\theta=90^{\circ}$ and $\sin \theta=1$ , so we can ignore it in the formula.

Therefore, we can use the data of the problem to calculate the magnetic force on the bullet:
$F=qvB=(2.0 \cdot 10^{-12}C)(300 m/s)(7.0 \cdot 10^{-5} T)=4.2 \cdot 10^{-14} N$

6 0

3 years ago