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MaRussiya [10]
2 years ago
5

What is the gravitational potential energy of a 15.0kg object that is 5.00m above the ground relative to a point 8.00m above the

ground?
-441J
735J
-735J
441J
Physics
1 answer:
Licemer1 [7]2 years ago
4 0

Explanation:

an object's gravitational potential energy Eg is m×g×h where:

m=mass

g=9.8m/s²

h=height relative to the closest object below it (because it cannot potentially fall through it

so Eg = 15×9.8×5=735J

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Molecules that are amphipathic must contain _____.
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Explanation:

Amphipathic molecules are the molecules that consists of both polar and non-polar parts.

For example, fats and oils are amphipathic molecules.

Amphipathic molecules have two different parts. One is water loving which is also known as hydrophilic side and other is water fearing which is also known as hydrophobic side.

Molecules that are amphipathic must contain both hydrophilic and hydrophobic regions or parts.

4 0
3 years ago
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There are 3 vertical parallel straight wires. The wire to the left has a current flowing vertically up, the wire in the middle h
Fittoniya [83]

Answer:

The net force on the middle wire will be zero.

Explanation:

Given:

There are three vertical wires. The wires to the left and in the middle have a current flowing vertically up and the wire to the right has a current vertically down.

Consider the figure shown. Let's assume that the magnitude of current in each wire is I and each wire is situated at a distance r from each other.

The magnetic field on the middle wire due to the wire in left is directed perpendicularly inward to the screen, as shown in the diagram. The magnetic field on the middle wire due to the wire in the right is directed perpendicularly outward to the screen, as shown in the diagram.

The force on the wire in the middle due to the left one is given by

F_{21} = \dfrac{\mu_{0}I^{2}}{2 \pi r}

where \mu_{0} is the permeability of free space.

The direction of the force is towards the wire in the left, as shown in the figure.

The force on the wire in the middle due to the right one is given by

F_{23} = \dfrac{\mu_{0}I^{2}}{2 \pi r}

The direction of the force is towards the wire in the right, as shown in the figure.

As the magnitude of the forces are equal but the directions are opposite to each other, the net force on the middle wire will be zero.

6 0
3 years ago
How is the voltage (electrical potential energy) of the current affected as it passes through a resistor?
Margaret [11]
Electrical voltage is the potential energy of an electrical supply stored in the form of an electrical charge. From the equation I = V/R, the current flowing through a circuit is directly proportional to the voltage and inversely proportional to the resistance.Therefore, the voltage of the current increases as it passes through a resistor. 
7 0
3 years ago
How much force is required to accelerate an 8 kg mass at 5 m/s​
Lina20 [59]

Answer:40

Explanation:

f=ma

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7 0
3 years ago
A force of 29.4 N is required to pull a 100 kg ice block at constant speed along an ice surface. Find the coefficient of kinetic
mestny [16]

Answer:

The value is  \mu_k  = 0.03

Explanation:

From the question we are told that

  The force applied on the ice is F = 29.4 N

   The mass of the ice block is  m = 100 \  kg

Generally for the ice block to move at constant speed , the force applied on it must be equal to the kinetic frictional force which is mathematically represented as

         F_F =  m* g *  \mu_k

=>      F = F_F = m* g * \mu_k

=>      29.4 =  100 * 9.8 * \mu_k

=>       \mu_k  = 0.03

6 0
3 years ago
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