What would likely have happen to earth if no icy debris had arrived

1. Which force is being applied by a vendor when he is pushing the pushcart? *

marta [7]

Answer:

1. Muscular force

2. Speed decreases

3. higher than

4. decreases

5. air pressure

6. Inversely proportional to the area of contact

7. 20 N

8. 400 N / m2

9. 150 N

10. friction

Explanation:

1. During pushing the pushcart the person is required to use strength of his arms and legs muscles that will creat a force between the surfaces, hence the force used is muscular force.

2. The speed of car decreases while applying brakes because a friction is generated between the brakes and the wheel that reduces the kinetic energy of vehicle and decreases the speed of the vehicle.

3. The pressure of the water at the bottom of the pond is higher than at the surface of pond because water pressure increases with the depth of the water. Water pressure increases in the depth because weight of water over the body icreases as going deep.

4. At higher altitude the atomspheric pressure decreases because as the height in atmosphere increases the amount of air molecules decreases and so, less oxygen for breathing.

5. Air pressure allows the dropper to fill inks as dropper exerts a force on a surface of ink and due to the low pressure inside the dropper sucks up the liquid.

6. Pressure is defined as the perpendicular force exerted at the surface or it means force per unit area. Pressure is directly proportional to the force and inversely proportional to area of contact.

7. The boys exerts pressure in opposite direction on an object, hence the resultant force will be

resultant force = force 1 - force 2 = 60N−40N=20N.

8. pressure (P) is equal to force (F) per unit area (A)

P = F / A

= 800 / 2

= 400 N / m2

9. Pressure (P) = 300 Pa

Area of Cross-section (A) = 0.5 m²

Force = P × A

= 300 × 0.5

= 150 N

10. Friction is the force that is always applied against or opposite to the moving direction of an object. Friction is responsible to stop the movement of any moving object such as vehicles and sliding objects.

Hence, the correct option of the questions are:

1. Muscular force

2. Speed decreases

3. higher than

4. decreases

5. air pressure

6. Inversely proportional to the area of contact

7. 20 N

8. 400 N / m2

9. 150 N

10. friction

7 0

2 years ago

Lana was walking down the sidewalk looking at her phone and didn't notice the curb ahead. As she tripped her ankle turned inward

spin [16.1K]

Answer:

ligament bcos ligament heal before bone

6 0

2 years ago

Match each scenario to its related biomolecules. Jack is eating a diet that will help him build muscle, so he eats a diet high i

Stells [14]

The options for this question are as follows:

A. Nucleic acids

B. Carbohydrates

C. Fats

D. Proteins

Now the correct answers of the match are as follows:

Jack is eating a diet that will help him build muscle, so he eats a diet high in this. D. Proteins

Explanation: Proteins help to build up the muscles. That's why people who want to do body-building, eat protein rich foods, like chicken, eggs, soy, etc.

Before a race, Ruth drinks a beverage full of this biomolecule to get energy. B. Carbohydrate

Explanation: This biomolecule provides instant energy to our body. For example, glucose is consumed before race, as dissolves quickly in our blood and provides instant energy. Glucose is an example of simplest carbohydrate.

These molecules in olive oil will help Ruth’s body store long-term energy. C. Fats

Explanation: Fats are the kind of biomolecule which is stored in our body in the adipose tissues. Also, when glucose is all used up by our body cells, the body starts to get energy from this stored fat.

Elizabeth has been advised to go for genetic screening to detect any abnormalities in her unborn child. A. Nucleic acids

Explanation: Every cell of our body has DNA, and it contains all the genetic information about the whole body. DNA is a kind of nucleic acid. If Elizabeth is going for test of the abnormality, it means she is going to test for the DNA of her child.

6 0

2 years ago

What two parts of a nucleotide do not ?change throughout the structure of DNA a. Five-Carbon Sugar and Phosphate Group b. Five-C

Stolb23 [73]

Answer:

a. Five-Carbon Sugar and Phosphate

Explanation:

A nucleotide can be defined as an organic molecule which forms the building block of nucleic acid such as deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).

Basically, nucleotide comprises of the following parts;

1. Nitrogenous base: this includes adenine (A), thymine (T), guanine (G), and cytosine (C) which are mainly found in the DNA while adenine (A), guanine (G), uracil (U) and cytosine (C) are found in the RNA.

2. A phosphate group.

3. A penrose sugar: it is either deoxyribose in DNA or ribose in RNA.

The two parts or chemical components of a nucleotide which do not change throughout the structure of DNA are;

I. Five-Carbon Sugar also known as deoxyribose and it has hydrogen on its second carbon.

II. Phosphate: this is the structural backbone that provides support to DNA.

3 0

2 years ago

A scientist has an uncharacterized pea plant. She wants to determine the plant’s genotype for seed color. In order to be certain

aleksklad [387]

Answer:

Recessive phenotype plant

Explanation:

If the plant has recessive genotype then it will be easy to identify because it will have the recessive phenotype. However if the plant has dominant phenotype it can either have homozygous genotype or heterozygous genotype. To confirm if the plant is homozygous or heterozygous, a test cross can be done with plant having recessive phenotype.

If our test plant is homozygous dominant, it will pass one dominant allele to the next generation and all the offspring would have dominant phenotype. If our test plant is heterozygous dominant it will pass one dominant allele to half of the offspring and one recessive allele to another half so 50% of next generation will have dominant phenotype and other 50% will have recessive phenotype.

Hence by test cross (cross with recessive phenotype plant) it is possible to determine the genotype of the uncharacterized pea plant.

7 0

2 years ago