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kodGreya [7K]
3 years ago
9

The equation for the chemical reaction shown is not balanced. What number should replace the question mark to balance this equat

ion?
2KBr + ?Pb(NO3)2 → 2KNO3+ PbBr2

A.
The equation is balanced as is.

B.
A 6 is required.

C.
A 3 is required.

D.
A 2 is required.
Physics
1 answer:
Fudgin [204]3 years ago
7 0
The equation is balanced as it is.
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The strength of the Earth’s magnetic field B at the equator is approximately equal to 5 × 10−5 T. The force on a charge q moving
Blizzard [7]

Answer:

2.4\cdot 10^{-11} N

Explanation:

Since the Earth's magnetic field is perpendicular to your direction of motion, the strength of the magnetic force exerted on your head is given by:

F=qvB

where:

q=6\cdot 10^{-9}C is the charge on your head

v=80 m/s is the speed at which you are moving

B=5\cdot 10^{-5} T is the strength of the magnetic field of the Earth

By substituting these numbers into the equation, we find the strength of the magnetic force:

F=(6\cdot 10^{-9}C)(80 m/s)(5\cdot 10^{-5} T)=2.4\cdot 10^{-11} N

7 0
3 years ago
During a visit to the beach, you get in a small rubber raft and paddle out beyond the surf zone. Tiring, you stop and take a res
Monica [59]

Answer:

The main difference in these two movements is that the first is a pure swing movement and the followed form a wave travels from the beach

Explanation:

The movement in the two parts is very different, when the surf zone has passed it is in a deeper part of the water where the seabed does not rise much, therefore due to the movement of the waves there is an upward oscillatory movement and descending, in this movement there is no horizontal displacement.

When it is within the southern zone, there is a rapid rise of the sea floor, which generates a horizontal movement, having a traveling wave, therefore your movement is more complicated, you can have some oscillating movement on the axis and, but in addition to this you have a horizontal movement that reaches you towards the beach, forming a Traveling wave.

The main difference in these two movements is that the first is a pure swing movement and the followed form a wave travels from the beach

3 0
3 years ago
Someone help me with letter d. and e. I’m supposed to solve for y.
Bumek [7]

Answer:

t=\frac{a}{\sqrt{1-\frac{y^2}{c^2}}}\\\frac{y^2}{c^2}=1-\frac{a^2}{t^2}\\y^2=\frac{c^2t^2-c^2a^2}{t^2}\\y=\frac{c}{t}\sqrt{t^2-a^2}

t=\frac{a}{\sqrt{1-\frac{v^2}{y^2}}}\\\frac{v^2}{y^2}=1-\frac{a^2}{t^2}\\\\\frac{v^2}{y^2}=\frac{t^2-a^2}{t^2}\\y^2=\frac{v^2t^2}{t^2-a^2}\\y=\frac{vt}{\sqrt{t^2-a^2}}

7 0
3 years ago
Within a pendulum, as potential energy decreases, _____ energy increases.
Sonbull [250]

Kinetic Energy because when the pendulum is dropped its gravitational energy is transferred into kinetic energy as it gains speed.

6 0
4 years ago
Pls help i have test
ludmilkaskok [199]

Answer:

I think the answer is a no. I guess

Explanation:

don't mind if it is write or wrong

5 0
3 years ago
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