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2 years ago

A 20 metric ton train moves toward the south at 50 m/s. At what speed must it travel to have four times its original momentum

Physics

1 answer:

OverLord2011 [107]2 years ago

5 0

Answer:

200 m/s

Explanation:

as momentum is a product of mass and speed, and mass is not changing, four times the speed will result in four times the momentum.

p = mv

4p = m(4v)

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A point charge with a charge q1 = 4.00 μC is held stationary at the origin. A second point charge with a charge q2 = -4.10 μC mo

GrogVix [38]

Answer:

W = -0.480 J

Explanation:

given,

q₁ = 4 μC

q₂ = -4.10 μC

$W = kq_1q_2(\dfrac{1}{a}+\dfrac{1}{b})$

$b = \sqrt{(0.27-0)^2+(0.27-0)^2}$

b = 0.381

k = 8.99 × 10⁹ Nm²/C²

$W = 8.99\times 10^9\times 4\times 10^{-6}\times (-4.1 \times 10^{-6})(\dfrac{1}{0.17}+\dfrac{1}{0.381})$

$W = [-147.436\times (5.88-2.62)\times 10^{-3}]J$

W = -0.480 J

Work done by the electric force W = -0.480 J

4 0

3 years ago

There are several ways to model a compound. One type of model is shown. 4 C's are connected in a line by 3 black lines. The C on

stealth61 [152]

Answer:

The chemical formula for the molecule is $C_4H_9O_2$

Explanation :

Molecular formula : It is the chemical formula which depicts the actual number of atoms of each element present in the compound.

Structural formula : It is a formula in which the lines are used between the bonded atoms and the atoms are also shown in the structural formula.

In the structural formula, the lines are used between the atoms.

As per given information of compound we conclude that, there are 4 carbon atoms, 9 hydrogen atoms and 2 oxygen atoms.

Thus, the chemical formula for the given molecule will be, $C_4H_9O_2$

7 0

3 years ago

Zona onde não incide luz visível devido à interposição de um objeto opaco.

m_a_m_a [10]

Answer:

can you please translate to english?

Explanation:

8 0

3 years ago

An object is projected horizontally at 18.4 m/s from the top of a 162.7 meter cliff.

miskamm [114]

Answer:

106.03 meters

Explanation:

The height is given by the formula for motion under the influence of gravity.

h = -4.9t^2 +162.7

Height is 0 when ...

0 = -4.9t^2 +162.7

4.9t^2 = 162.7

t^2 = 162.7/4.9

t = √(162.7/4.9)

The horizontal distance traveled in that time is ...

(18.4 m/s)√(162.7/4.9) s ≈ 106.03 m

The object will strike the ground about 106.03 meters from the base of the cliff.

5 0

2 years ago

a force of 500newtons is used to push a box of mass 45kg up a plane 3meters inclined at an angle of 40degrees to the horizontal.

Vinil7 [7]

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6 0

3 years ago