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4 years ago

Which class of organic molecules includes those whose main purpose is long-term energy storage?

Physics

1 answer:

omeli [17]4 years ago

3 0

Answer:

Fats.

Explanation:

A fat molecule which is called a Triglyceride consists of two main components which are glycerol and 3 fatty acids. Fats are solids and oils are liquids at room temperature. They also include saturated and unsaturated fats.

Cells store energy for long-term use in the form of lipids called fats which provides insulation from the environment for plants and animals.

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Pravat exerts a force of 30 N to lift a bag of groceries 0. 5 m. How much work did Pravat do on the bag? Note : Work = Force x D

Black_prince [1.1K]

The amount of work done by Pravat if he exerts a force of 30 N to lift a bag of groceries 0.5m is 15J.

The work done by a body can be calculated by multiplying the force exerted by the distance moved. That is;

Work done = force (F) × distance (m)

According to this question, Pravat exerts a force of 30N to lift a bag of groceries 0.5 m. The work done is calculated as follows:

Work done = 30N × 0.5m

Work done = 15J

Therefore, the amount of work done by Pravat if he exerts a force of 30 N to lift a bag of groceries 0.5m is 15J.

Learn more about work done at: brainly.com/question/8119756?referrer=searchResults

8 0

2 years ago

Read 2 more answers

If a ball is rolling at a velocity of 1.5 meters per second and has a momentum of 10.0 kg meters per second what is the mas6of t

g100num [7]

The mass of the ball is 6.67 kg

Explanation:

The momentum of an object is given by:

$p=mv$

where

p is the momentum

m is the mass of the object

v is its velocity

It must be noted that momentum is a vector quantity, so it has both magnitude and direction (but here only the magnitude is given).

For the ball in this problem, we have:

v = 1.5 m/s is its velocity

p = 10.0 kg m/s is its momentum

Solving the formula for m, we find the mass of the ball:

$m=\frac{p}{v}=\frac{10}{1.5}=6.67 kg$

Learn more about momentum:

brainly.com/question/7973509

brainly.com/question/6573742

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#LearnwithBrainly

6 0

3 years ago

a 10 kg block is attached to a light chord that is wrapped around the pulley of an electric motor. at what rate is the motor doi

defon

Answer:

The rate of work is 360 W

Explanation:

Given:

Speed of block $v = 3 \frac{m}{s}$

Upward acceleration of block $a = 2 \frac{m}{s^{2} }$

Mass of block $m = 10$ kg

First Find the force act on block due to gravity

$F = M (a + g)$

Where $g = 10 \frac{m}{s^{2} }$

$F = 10 \times (10+2)$

$F = 120$ N

For finding at what rate motor doing work when it is pulling the block upward,

$P = F.v$

$P = 120 \times 3$

$P = 360$ W

Therefore, the rate of work is 360 W

6 0

4 years ago

A 1000-kg car is driving toward the north along a straight horizontal road at a speed of 20.0 m/s. The driver applies the brakes

OlgaM077 [116]

Answer:

Explanation:

mass of car, m = 1000 kg

initial velocity, u = 20 m/s

final velocity, v = 0 m/s

distance, s = 120 m

Let a be the acceleration of motion

use third equation of motion

v² = u² + 2 as

0 = 20 x 20 + 2 x a x 120

a = - 1.67 m/s²

Let F be the force

Force, F mass x acceleration

F = - 1000 x 1.67

F = - 1666.67 N

The direction of force is towards south and the magnitude of force is 1666.67 N.

8 0

3 years ago

A bowling pin is thrown vertically upward such that it rotates as it moves through the air, as shown in the figure. Initially, t

zheka24 [161]

Answer:

Explanation:

In projectile, the formula for calculating the maximum height reached by the pin is expressed as;

H = u²/2g

u is the speed/velocity = 10m/s

g is the acceleration due to gravity = 9.81m/s²

Substitute

H = 10²/2(9.81)

H = 100/19.62

H = 5.097m

Hence the maximum height of the center of mass of the bowling pin is most nearly 5.0m

3 0

3 years ago