What must occur to a shopping cart at rest in order to make it roll forward?A) A force must be provided to overcome gravity.

B) Balanced forces must be acting upon the cart.

C) An unbalanced force applied to the cart pushing or pulling it forward.


D) The unbalanced force acting upon it must be smaller than that of friction.

Answers

Answer 1
Answer:

An unbalanced force applied to the cart pushing or pulling it forward, must occur to a shopping cart at rest in order to make it roll forward, hence option C is correct.

What is force?

The downward-moving gravitational force will be at work. A force called the normal force will react to the gravitational force in accordance with Newton's third law. And formal force will exert upward pressure.

The magnitude of these two forces is the same. Due to their mutual cancellation, the net force acting on the cart in the vertical direction will be zero.

They may result from factors like magnetism, gravity, or anything else that could speed up a mass. A force in physics is any effect that, if left unchecked, will alter an object's motion.

Therefore, option C is correct.

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Answer 2
Answer:

The answers to this question is c]  An unbalanced force applied to the cart pushing or pulling forward .


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15. Which of the following is not an accurate description of chemical reactions? A. The rates of chemical reactions can vary. B. Chemical reactions that take in energy never need a source of energy to start. C. During chemical reactions, energy can be released or used up. D. During chemical reactions, bonds can be broken or formed.

Strawberry plants typically reproduce by making runners, which are miniature versions of themselves, that grow off of the roots and stems of the parent. This type of vegetative reproduction is known as A) pollination. B) fragmentation. C) binary fission. D) vegetative propogation.

Answers

The runners of strawberry plants are also called as the stolons. The strawberry plant vegetatively PROPAGATES with the help of these runners, and the base of the plant lies above the soil-surface, from which the stolons grow. Stolons are horizontal connection between the plants.

The answer is D.) Vegetative propogation.

Imagine that you are observing an enzyme-catalyzed reaction in the lab. Every time you add more enzyme, the reaction rate increases proportionally until the reaction rate suddenly levels off. No other chemicals were added, and no modifications were made in the experimental setting. Why do you think the reaction rate stopped increasing?

Answers

The rate of reaction stops increasing because there is no substrate left to bound with an enzyme to increase the rate of reaction.

What is an enzyme?

An enzyme is a substance that increases the rate of reaction by catalyzing the reaction.

The enzyme is called a biological catalyst.

Enzyme work when it combines with the substrate of the reaction to make products.

When the enzyme is added, the rate of reaction increase because it fastens the reactions.

But when the substrate is converted into a product and there is no substrate left to combine with enzyme the rate of reaction stop increasing.

Thus, The rate of reaction stops increasing because there is no substrate left to bound with an enzyme to increase the rate of reaction.

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Answer:

All the substrates are bound to the enzyme, thats why the reaction rate stopped increasing.

Explanation:

Actually an enzyme works by binding a substrate molecule to its active site, producing a product  , resulting in an increase in the rate of reaction.

            Enzyme + substrate = Enzyme + product

Whenever enzymes are added , reaction rate increases as the substrates are being bound to the enzyme's active sites but then occurs a stage where further addition of enzyme cannot increase the reaction rate because all the substrates have bound to the enzyme and there are no substrates left.Hence the reaction rate stopped increasing.

In the water process what do clouds form as a result of?

Answers

Answer:

Clouds are created when water vapor, an invisible gas, turns into liquid water droplets. These water droplets form on tiny particles, like dust, that are floating in the air. ... That means some of the liquid water in the towel or bowl changed into an invisible gas called water vapor and drifted away into the atmosphere.

Answer:

condensation

Explanation:

When the body receives stimuli, which structure typically processes the stimuli?sensory nerve cell
motor nerve cell
brain
meninges

Answers

The brain recieves stimuli. Your brain does a lot of things for you. It is one of the busiest organs in your body. Your brain stimulis can enjoy various brain stimulis games to keep your brain healthy and sharp. if it stays healthy, everything follows after.

im pretty sure its C.........


What is the simplest level of organization in a human being

Answers

It is an organelle, which make up cells, which make up tissues, which make up organs, which make up organ systems, and then the body 
The organelle is the simplest level of organization in a human being. 

Which of the following statements about bioengineered foods is false?a. Their DNA has been modified.
b. They have been genetically modified.
c. They were developed during the Green Revolution.
d. Genetic material from another organisms is sometimes added

Answers

The answer is: b.They have been genetically modified.
>Genetically modified foods or GM foods are  genetically engineered foods. They are foods produced from organisms that have had changes introduced into their DNA using the methods of genetic engineering.
>Bioengineered foods are foods that have had a gene from a different species of plant or other organism introduced to produce desired characteristics or traits.

The bioengineered food products are those food products, which are modified by the alteration in their genetic material. There alteration in the genetic material is done by changing and incorporating the gene of interest in the DNA of the organism. Sometimes, the gene of interest are derived from the genome of the other organisms.

The use of the chemical pesticides escalated the green revolution, at that time  the genetically modified food product were not so developed.

Hence, the correct answer is c. They were developed during the Green Revolution.