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NemiM [27]
4 years ago
10

How does air masses move across the United States

Physics
1 answer:
levacccp [35]4 years ago
7 0
Uh.............................
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A lumberjack (mass = 98 kg) is standing at rest on one end of a floating log (mass = 290 kg) that is also at rest. The lumberjac
Dafna11 [192]

Answer:

a)V= - 1.11 m/s  

b)V= 0.833 m/s

Explanation:

Given that

M (Mass of lumberjack)= 98 kg

Final velocity of lumberjack ,V₁= 3.3 m/s

m (Mass of log) = 290 kg

a)

There is no any external force that is why linear momentum will be conserved

Pi=Pf

initially both are at rest so Pi=0  ( P = m v)

Lets take speed of log is V

0= M V₁ + m V

V = - M V₁ / m

V= - 98  x  3.3 / 290

V= - 1.11 m/s  

b)

Now again from linear momentum conservation

(m + M )V =M V₁

V= M V₁(m+M)

By putting the values

V= 98  x 3.3/ (98 + 290 )

V= 0.833 m/s

3 0
3 years ago
Two charged particles attract each other with a force of magnitude F acting on each. If the charge of one is doubled and the dis
irakobra [83]

Answer:

F/2

Explanation:

In the first case, the two charges are Q1 and Q2 and the distance between them is r. K is the Coulomb's constant

Hence;

F= KQ1Q2/r^2 ------(1)

Where the charge on Q1 is doubled and the distance separating the charges is also doubled;

F= K2Q1 Q2/(2r)^2

F2= 2KQ1Q2/4r^2 ----(2)

F2= F/2

Comparing (1) and (2)

The magnitude of force acting on each of the two particles is;

F= F/2

4 0
3 years ago
Two straight wires are in parallel and carry electrical currents in opposite directions with the same magnitude of 2.0A. The dis
Veronika [31]

Answer:

Explanation:

Two straight wires

Have current in opposite direction

i1=i2=i=2Amps

Distance between two wires

r=5mm=0.005m

Length of one wire is ∞

Length of second wire is 0.3m

Force between the wire,

The force between two parallel currents I1 and I2, separated by a distance r, has a magnitude per unit length given by

F/l = μoi1i2/2πr

F/l=μoi²/2πr

μo=4π×10^-7 H/m

The force is attractive if the currents are in the same direction, repulsive if they are in opposite directions.

F/l = μoi1i2/2πr

F/0.3=4π×10^-7×2²/2π•0.005

F/0.3=1.6×10^-4

Cross multiply

F=1.6×10^-4×0.3

F=4.8×10^-5N

3 0
4 years ago
A 1.25 m long pendulum on Mars
expeople1 [14]
Try to repost so somebody answer
6 0
4 years ago
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What three sprites are needed to create the Space Invaders game that was discussed in the unit? spaceship, laser, enemy gnome, a
Lilit [14]

Answer: anlien, enemy gnome, spaceship

Explanation:

3 0
2 years ago
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