All categories

3 years ago

Which of the following refers to a force of resistance that acts on an object when the object moves against other matter

Biology

1 answer:

jeka57 [31]3 years ago

8 0

FRICTION is the force of resistance that acts on an object when the object moves against other matter

Explanation:

There are many types of friction. An example is static friction between objects that are not moving relative to each other. Kinetic friction, on the other hand, is between moving objects. Viscosity is related to friction in flowing liquids.

When a solid matter is moving in a fluid (such as water or air), the friction is usually referred to as drag.

Friction is experienced in everyday life. An example of its importance is in the braking of moving vehicles. Without friction, cars would be unable to halt to a stop when brakes are applied. The friction allows the tires to rub against the brake pads and the road and the kinetic energy of the car is transformed and dissipated as heat energy enabling the car to come to a stop.

Learn More:

For more on friction check out;

brainly.com/question/14382762

brainly.com/question/1800116

#LearnWithBrainly

You might be interested in

Which letter correctly identifies telophase

slava [35]

The word phase means to change a part of a development

5 0

4 years ago

Read 2 more answers

During the 18th century what was England’s view on inoculations

stepan [7]

Answer:

For many centuries, smallpox devastated mankind. In modern times we do not have to worry about it thanks to the remarkable work of Edward Jenner and later developments from his endeavors. With the rapid pace of vaccine development in recent decades, the historic origins of immunization are often forgotten. Unfortunately, since the attack on the World Trade Center on September 11, 2001, the threat of biological warfare and bioterrorism has reemerged. Smallpox has been identified as a possible agent of bioterrorism (1). It seems prudent to review the history of a disease known to few people in the 21st century.

Edward Jenner is well known around the world for his innovative contribution to immunization and the ultimate eradication of smallpox (2). Jenner's work is widely regarded as the foundation of immunology—despite the fact that he was neither the first to suggest that infection with cowpox conferred specific immunity to smallpox nor the first to attempt cowpox inoculation for this purpose.

Explanation:

3 0

4 years ago

A cell membrane that transports glucose, ions, or other charged or polar molecules is likely to have a higher percentage and gre

erica [24]

Answer: True

Explanation:

<u>A cell membrane consists of a lipid bilayer made of polar phosphate head and a nonpolar lipid tail.</u> It is semipermeable and regulates the transport of materials through it. For this,<u> it is selectively permeable</u> and since it is made of lipids, hydrophobic and small polar molecules can diffuse easily through it by simple diffusion and down their concentration gradient. However, polar molecules, large molecules (such as glucose) and ions are not able to pass through it because they are repelled.

To accomplish the transport of these molecules that can not diffuse, proteins embebbed in the membrane function as carriers that enable the transport of polar molecules, large molecules and ions by passive (through facilitated diffusion, down its concentration gradient) or active transport (movement against its concentration gradient).

7 0

3 years ago

Cells must use energy to move a substance against a concentration gradient i.e., from a compartment with a low concentration of

garik1379 [7]

Answer:

Transport of sodium ions out of the cell

Transport of potassium into the cells

Transport of calcium ions out of cell

Transport of calcium ions OUT OF the cytoplasm of a cell and INTO an organelle that has a high concentration of calcium ions.

Explanation:

In general the concentration of sodium ion is higher outside the cell in the extracellular fluid and the concentration of potassium ion is higher inside the cell.

During an active transport, a cell uses energy to move molecules against the gradient as a part of primary active transport. In the secondary active transport, the molecules move as per the electrochemical gradient established by the primary active transport.

In primary active transport, sodium ion moves out of the cell and potassium ion moves into the cell through the assistance of sodium potassium pump. In order to maintain the stability, calcium ion from the sarcoplasmic reticulum is pumped out of the cell

Hence , the correct answers are

Transport of sodium ions out of the cell

Transport of potassium into the cells

Transport of calcium ions out of cell

Transport of calcium ions OUT OF the cytoplasm of a cell and INTO an organelle that has a high concentration of calcium ions.

8 0

4 years ago

The concept of __________ means that because of their genetic makeup, individuals differ in their responsiveness to qualities of

Leni [432]

Answer: Behavioral genetics

Explanation: This concept indicates that our genes influence our environment and in return, the environment influences our genes. Behavioural genetics has therefore expressed gene-environment interactions on the behaviour of an individual.

3 0

4 years ago