If you throw a ball up with a velocity of 7 m/s, how long will it take for the ball to reach
the top of its path?
Answer:
42secs
Explanation:
v=u-gt
0=7-10t
10t=7
t=7/10
t=7/10*60
t=42
A student is doing a genetics experiment on beetles. The student breeds a pure green beetle with a pure brown beetle. The student repeats this experiment ten more times. Every time the student performs this cross, all of the offspring are green. What does that mean? A. The gene for green and brown are equally expressed because half the beetle parents have a green phenotype and half the beetle parents have a brown phenotype. B. The gene for green color is dominant over the gene for brown because all the beetle offspring have a brown phenotype. C. The gene for brown color is dominant over the gene for green color because all of the beetle offspring have a brown genotype. D. The gene for green color is dominant over the gene for brown color because all the beetle offspring have a green phenotype.
Answer:
b
Explanation:
bbhbh
The genes for green color are dominant over the genes for brown color because all the beetle offspring have a green phenotype. Therefore, option (D) is correct.
What is phenotype?In biology, a phenotype can be described as the observable characteristics of an organism which is the result of the interaction of environmental factors and genes. These traits involve physical appearances and any traits that we can observe.
The phenotype includes its physiological, biochemical, as well as behavioral properties. Genotype is inherited from the parents while the phenotype can be affected by lifestyle and environmental factors. Environmental factors such as nutrition, temperature, humidity, and mental health of the organism.
For example, flamingoes are white in color but turn pink because of the pigments they need from their diet. Therefore, flamingoes portray how they are affected by environmental factors. The phenotype of an organism changes, accordingly to environmental factors.
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Calculate the amount of horizontal force needed to make a 0.4 kg soccer ball accelerate at 250 m/s2when kicked.
Answer:
100N
Explanation:
Force = Mass x Acceleration
Force = 0.4 kg x 250 m/s2
Force = 100N
which of the following best represents force?
1-a push or a pull acting on a object.
2-a push or a pull always causing acceleration.
3-a push or a pull action without an object.
4-a push or a pull always causing motion
Answer:
1 -a push or a pull acting on a object.
Explanation:
force is a push or pull acting upon an object as a result of its interaction with another object.
Todd expends 400J while pushing a lawn mower across 20m. What force did he use to mow
the lawn? Show your work.
Answer:
F = 20 N
Explanation:
The work is said to be done when an object is acted upon by an external force. And as a result of this force the object is displaced by some distance. Hence, the formula for the work done is given as:
W = F*d
where,
W = Work Done = 400 J
F = Force Applied = ?
d = Distance Covered = 20 m
Therefore, using these values in equation, we get:
400 J = F(20 m)
F = 400 J/20 m
F = 20 N
Local winds are caused by what?
A. The unequal heating of the Earths surface
B. Weather systems
C. The rotation of the Earths surface
why are unit of length mass and time independent with each other?
2. If the ball has a velocity of 2.3 m/s, how long does it take it to go 1.1 m?
s
Answer:
2 seconds lol im just a kid but I know these lol who has tiktok
ITS TIMED PLEASE HELP !!!!!
Based on the experimental evidence above, what specific term below can be used to describe the relationship
between the net force acting on an object and its acceleration? Include specific trials that support your claim.
Types of Relationships
Direct-linear
Direct-squared
Inverse-linear
Inverse-squared
Answer: direct linear
Explanation:
15 POINTS URGENT DUE IN 5 MINUTES :(
please don’t troll.
A. A woman hiked on a trail up a mountainShe slowed down as it became more steep. She stopped at the top to take in the view below. Then she continued on the trail and walked down the other side of the mountain.
B. A truck driver left a warehouse and drove on a highway at a constant speed before he stopped for lunch. To make up for lost time, he drove faster when he got back on the highway. He unloaded his haul and drove quickly back to the warehouse.
C. A woman drove her car up steep bill and stopped at a red lightWhen the light turned green she continued to drive up the rest of the hill until she reached the gas station. She stopped to buy gas and then drove down the other side of the hill towards her office.
D. A man ran in a race and accelerated steadily for the first hour. He then continued briefly at a constant pace while he had the lead. When other runners began to catch up he accelerated againHe then continued at a constant high speed. He became overtired and slowed down until he had to completely stop running.
Answer:
D now go to ur good life :)
Explanation:
Answer:
blah
Explanation:
blah
Why do we use insulators if they prevent the flow of electricity?
Answer:
letterman is shooting the kids
We use insulators to avoid being electrocuted. electricians use rubber gloves to avoid shock. Cables are insolated with rubber so you can hold them without getting shocked even if it is plugged in.
Materials that resist the charges flowing through are ??
Answer:
obstacles
Explanation:
obstacles are the answer to 1. Contract
2. Quartering
3. Profit
4. Tax stamp
5. Declaration of Independence
6. Search
7. House if Burgesses
8. England
I did my best but I could see some of the words :(
Hope this helps!!!
Please help!
Which of the following will increase the force needed to pull an object up a ramp?
A, Oiling the ramp
B. Reducing the angle of the ramp
C. Putting wheels underneath the object
D. Increasing the mass of the object
Answer:
I believe the answer is B. Reducing the angle of the ramp. ( sorry if wrong:)
Which statement best describes covalent bonding?
A. Two nonmetal atoms share electrons between them.
B. Two metal atoms share electrons between them.
C. Many atoms give up electrons that can move among the atoms.
D. A metal atom transfers electrons to a nonmetal atom.
Answer:
A. Two nonmetal atoms share electrons between them
General Formulas and Concepts:
Chem
Covalent Bonding: between 2 nonmetalsIonic Bonding: between a metal and a nonmetalMetallic Bonding: between 2 metalsExplanation:
Covalent bonds are the ones between 2 nonmetal elements. Covalent bonding has 2 subcategories: Nonpolar Covalent and Polar Covalent.
An object travels in a straight line for 1200 m at a velocity of 50 m/s, what is its time of travel?
Given that,
distance = d = 1200m
velocity/speed = s = 50m/s
time = t
Also,
s = d/t
And,
t = d/s
t = 1200/50
t = 120/5
t = 24
Therefore, it takes 24s to travel.
Answer: Therefore, the travel time of a car that travels 1200 meters at 50 m/s is 24 seconds.
Explanation:
An object travels in a straight line for 1200 m at a velocity of 50 m/s, what is its time of travel?
Data:
d = 1200 m
V = 50 m/s
t = ?
The formula for uniform motion is:
V = d/tWhere
V = speedd = distancet = timeWe clear the formula for time t:
t = d/v
t = (1200 m)/(50 m/s)
t = 24 s
Therefore, the travel time of a car that travels 1200 meters at 50 m/s is 24 seconds.
A force of 25 newtons moves a box a distance of 4 meters in 5 seconds.
The work done on the box is [___] Nm, and the power is [___] Nm/s.
h e l p
Answer:
100 Nm and 25Nm/s.
Explanation:
Given the following data;
Force = 25N
Distance = 4m
Time = 5secs
To find the workdone;
Workdone = force * distance
Substituting into the equation, we have;
Workdone = 25*4
Workdone = 100 Nm
To find the power consumed;
Power = workdone/time
Substituting into the equation, we have;
Power = 100/4
Power = 25Nm/s
The work done on the box is 100 Nm, and the power is 25 Nm/s.
A person walks 8 m/s towards the north. Is this an example of speed or velocity? Explain your answer.
Answer:
I think it is velocity.
because velocity shows the direction and magnitude .
Answer:
Velocity
Explanation:
This is a case of velocity, since velocity apart from having magnitude also has direction. the person walks at 8 [m/s] to the North.
When we talk about speed, we only talk about the magnitude without taking into account the direction.
if you weigh 100 pounds and pull 4 g's how much do you now weigh
Answer:
sill 100?
Explanation:
What is intensity?
A.
The fastest your heart can beat
B.
How hard your body is working
C.
A place on your body where you can feel your heart beating
D.
None of the above
Answer:
D
Explanation:
None of the above because the intensity is amount of a property, force, brightness, and magnetic field.
Answer:
D. None of the above
Explanation:
D. None of the above, because the quality or condition of being intense. great energy, strength, concentration, vehemence, etc., as of activity, thought, or feeling: He went at the job with great intensity. a high or extreme degree, as of cold or heat. the degree or extent to which something is intense.
<>Hope this helps! : )
an electric motor converts electrical energy into what kind of energy?
A) potential
B) kinetic
C) stored
D) chemical
Answer:
B.) Kinetic energy.
Explanation:
A better answer would be mechanical energy, but they do not have that up there.
An electric motor converts electrical energy into kinetic energy. The rotational kinetic energy of the motor is its mechanical energy to work.
What is energy transformation ?Energy can neither be created nor be destroyed. However, it can be transformed from one form to the other. Hence, the total energy of a system is conserved.
The energy lost in one form is equal to the energy gained in another form. We are using many electrical devices all are working under the process of energy transformation.
In an electric motor, the electrical energy is converted to the rotational kinetic energy of the motor. It is used for mechanical work of the motor. The rotational kinetic energy make the motor rotating. Hence, option B is correct.
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I notice the wheels on my bicycle spin in a circular motion as I am pedaling. I know that the
wheels have a radius of 0.31m and they are going at a speed of 15 m/s. What is the centripetal
acceleration of my bike wheel?
Guess method
Answer:
Acceleration, a = 750m/s²
Explanation:
Given the following data;
Radius, r = 0.31m
Velocity, v = 15m/s
To find the centripetal acceleration;
[tex] Acceleration, a = \frac {v^{2}}{r}[/tex]
Substituting into the equation, we have;
[tex] Acceleration, a = \frac {15^{2}}{0.31}[/tex]
[tex] Acceleration, a = \frac {225}{0.31}[/tex]
Acceleration, a = 750m/s²
Therefore, the centripetal acceleration of the bike wheel is 750m/s².
a shot is fired with a velocity 100m/s in a direction making an angle 60 degree with vertical. calculate its time flight, maximum height reached and its horizontal range
Answer:
#Horizontal component of 100m/s=100 sin60=50×(root 3)=50×1.732=86.6m/s
#Vertical component of 100m/s=100 cos 60°=100/2=50m/s
(¡) Maximum height it can reach=(v^2+u^2) /2a=0+(50^2) / 2×(-10)=125m
(¡¡) The time takes to reach the maximum height =2S/(u-v)=125×2/(50-0)=5s
(¡¡¡) Horizontal range=ut=86.6×5=433m
Explanation:
# At the highest point (vertical) velocity is zero
#Velocity (horizontal) remains constant
(¡)By v^2=u^2+2as equation
(¡¡)By S=1/2(u+v)t equation
(¡¡¡) S=ut therefore horizontal range=ut
Velocity refers to an object’s _____ and direction.
Think of a scenario where an authoritarian leadership style would be beneficial. Explain. What are the reasons it would work well? What are the risks?
Answer:
Explanation:
A scenario in which an authoritarian leadership would be beneficial is in law enforcement in emergency cases (that has to do with public safety or national security) without the bureaucratic bottlenecks of the legislature and judiciary. For example, the recent coronavirus pandemic, authoritarian leaderships would find it easier to enforce the laws on wearing of masks and also prevent producers of personal protective equipment (PPE) from unreasonably inflating prices of there PPEs.
As explained above, it would work well because there will be no legislative bottleneck that will start a hearing at the expense of public safety neither will there be a court that will stall the process at the same expense.
The risks here is that businesses (in this case that of producing PPEs) may find it difficult to survive since the "tone" of the pricing of PPEs will now be determined by government. It may even hinder healthy business competition. It may also lead to production of substandard PPEs in order to generate enough profit (since the main aim of any business is to generate profit).
Under what circumstances will the distance traveled by an object be the same as the magnitude of the displacement of an object?
A horse is pulling a 50 kg sled with a horizontal force of 25 N. The force of friction in the opposite direction is 5 N. What is the horizontal acceleration of the sled
A jar of quarters sits on a table with zero velocity. There are two forces acting on the jar. What is this situation called?
A. Dynamic equilibrium
B. Inertia equilibrium
C. Force equilibrium
D. Static equilibrium
Answer: static
Explanation:
An instrument used to detect the current in a
circuit is called
Answer:
Ammeter
Explanation:
An ammeter is used to measure current.
true or false communication is important in healthy relationship
Answer:
True
Explanation:
If two partners don't communicate they'll grow apart and it may lead to one or the other cheating.
Answer:true
Explanation:
Mohammad has been saving 8 each week. Today he spent 142 of the savings, and he now has 50 left. For how many weeks has he been saving?
Answer:
24 weeks
Explanation:
142+50=192
192/8=24
