3 years ago

What is a substance ?????

1 answer:

6 0

Substance is some matter (it can be solid liquid or gas) that has its own properties.. everything in this world are substances...
like for example: the bread that we consume has - wheat ..yeast.. sugar.. salt or some other substances

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Kelps laws describes

ASHA 777 [7]

Explanation:

The correct answer to is C

8 0

3 years ago

A 2.2 m -long wire carries a current of 7.2 A and is immersed within a uniform magnetic field B⃗ . When this wire lies along the

zimovet [89]

Answer:

Explanation:

Given that :

The current I = 7.2 A

The length vector L = 2.2 m i

The force vector is = -2.6 j N

When L = 2.2 m i ; the

Force vector F = (2.6 i - 4.4 k) N

Compute the components of the magnetic field as follows:

$F = I(L*B)$

Replacing 7.2 A for I ; -2.6 j N for F & 2.2 m i for L

$-2.6 j N = (7.2 A)(2.2 m i *(B_xi + B_yj+B_zk)$

$-2.6 j N = 15.84B_z \ and \ 0 = 15.84B_y$

$B_z = -0.1641T \ and \ B_y = 0$

However in y direction ; we have :

$(2.6 i - 4.4 k) = 7.2 A (2.2 mi*(B_xi+B_yj+B_zk)$

$- 2.6 = 15.84 B_z \ and \ -4.4 = 15.84 B_x$

$B_z = -0.1641 T \ and \ B_x = -0.2778T$

Hence, the component of magnetic field is as follows:

$B_x = -.02778T \ ; B_y = 0 T \ ; B_z = - 0.1641 T)$

5 0

3 years ago

A 1500 kg car is moving 18 m/s how much force is required to bring the car to a stop in 12 seconds

Marat540 [252]

Answer:

2250N

Explanation:

F = Mv/t

Force F =?

Mass M = 1500kg

Velocity v = 18m/s

Time T = 12 secs

Therefore

F = 1500 x 18 /12

Multiply through

F = 27000/12

F = 2250N

3 0

3 years ago

What is the magnitude of the displacement of a car that travels half a lap along a circle of radius of 150m?

Lisa [10]

It would be equal to 2r = 2* 150 = 300m

6 0

3 years ago

What is the velocity of a 12kg object that has the momentum of 60kgm/s?

Bad White [126]

Answer: 5 m/s

Explanation:

Momentum = mv (mass*velocity)

60kg*m/s = (12kg)*(v)

v = (60kg*m/s)/(12kg)

v = 5 m/s

4 0

3 years ago