Answer:
the net force on the car is 8,000 N.
Explanation:
Given;
mass of the car, m = 800 kg
motive force of the car, F = 10,000 N
frictional force experienced by the car, Fk = 2,000 N
The net force on the car is calculated as;
∑F = F - Fk
∑F = 10,000 - 2,000
∑F = 8,000 N
Therefore, the net force on the car is 8,000 N.
IDENTIFY WHAT IS BEING DESCRIBED IN EACH SENTENCE AND WRITE YOUR ANSWER ON THE BLANKS
_______1. Allows ingestion and breaks down food so that nutrients can be absorbed.
_______2. Provides mechanical support; stores minerals and produces red blood cells.
_______3. Protects the body's internal environment and stores fat.
_______4. Enables the transport of nutrients, glasses and wastes to and from cells.
_______5. Secretes hormones into the bloodstream for regulation of cellular activities.
The correct answers for the given paragraph are as follow:
Digestive Enzymes allows ingestion and breaks down food.Skeletal system provides mechanical support and also stores minerals.Integumentary system protects the body's internal environment and stores fat.Cardiovascular system enables the transport of nutrients, glasses and wastes to and from cells.Endocrine glands secretes hormones into the bloodstream for regulation of cellular activities.1.
The digestive enzymes are the proteins that tends to break down the larger molecules like fats, proteins and carbs into smaller molecules.
Thus, the correct answer is Digestive Enzyme.
2.
The skeletal system is the framework of body, consisting of bones and various connective tissues. It provides the mechanical support and produces red blood cells.
Thus, the correct answer is skeletal system.
3. The organ system that protects the body's internal environment and stores the fat is known as Integumentary system.
Thus, the correct answer is integumentary system.
4.
The cardiovascular system enables the transport of nutrients, glasses and wastes to and from cells. Also, it is used for the transportation of nutrients and oxygen-rich blood to all parts of the body and to carry deoxygenated blood back to the lungs.
Thus, the correct answer is cardiovascular system.
5.
Endocrine glands are responsible for the secretion of hormones into the bloodstream to regulate the cellular activities.
Thus, the correct answer is Endocrine glands.
Learn more about the human organs and digestive system here:
https://brainly.com/question/16347243
Which is an example of convection currents?
marshmallows toasting over a campfire
a pot being heated by an electric burner
feet getting hot when stepping across sand
a radiator emitting warm air and drawing in cool air
Answer:
D
Explanation:
took the quiz!!! I picked B and got it wrong!
An example of convection currents is a radiator emitting warm air and drawing in cool air.
What is Convection?This is a method of heat transfer which is characterized by movement of a heated fluid such as air or water.
A radiator emitting warm air and drawing in cool air involves a fluid which is why option D was chosen as the most appropriate choice.
Read more about Convection here https://brainly.com/question/9382711
A plot of land contains 3.6 acres. How many square meters does it contain? [1 acre = 43,560 ft?)
Answer:
It contains approximately 14,568.7 square meters
Explanation:
Area Units Conversion
There are several units to express the area of a shape:
[tex]cm^2,\ m^2,\ km^2,\ ft^2,\ in^2,\ acres, \ hectares[/tex]
The process of expressing the area from one unit to the other is called a conversion.
Specifically, we are interested in converting from acres to square meters. The rule to make the conversion is:
[tex]1 acre = 4,046.86\ m^2[/tex]
The plot of land has 3.6 acres, thus its area is:
[tex]3.6 * 4046.86 =14,568.696\ m^2[/tex]
It contains approximately 14,568.7 square meters
4.Jessica Diggins a US world champion cross country skier is participating in the winter Olympic games. Over a 200m stretch in her race she increases her speed with a constant acceleration from 5.1 m/s to 6.2 m/s over a period of 25 seconds. What is her acceleration
Answer:
[tex]a=0.044\ m/s^2[/tex]
Explanation:
Given that,
Initial speed, u = 5.1 m/s
Final speed, v = 6.2 m/s
Time, t = 25 s
We need to find acceleration. We know that,
acceleration = rate of change of velocity
[tex]a=\dfrac{v-u}{t}\\\\a=\dfrac{6.2-5.1}{25}\\\\a=0.044\ m/s^2[/tex]
So, her acceleration is [tex]0.044\ m/s^2[/tex].
without calculation explain why the vertical component of velocity v h changes from 3.5 m/s at A to 0 m/s at B
Answer:
due to gravity.
Explanation:
.............
4. A driver takes 3.5 s to react to a complex situation. How far does the vehicle travel before the driver initiates a physical response to the situation (i.e., putting his or her foot on the brake)
This question is incomplete, the complete question is;
A driver takes 3.5 s to react to a complex situation while driving at a speed of 60 mi/h.
How far does the vehicle travel before the driver initiates a physical response to the situation (i.e., putting his or her foot on the brake)
Answer:
the distance travelled by the vehicle, before the driver initiates a physical response is 308 ft
Explanation:
Given that;
Reaction time t = 3.5 sec
Speed S = 60 mi/h
we convert mile to foot and hour to seconds
so
Speed S = 60 mi/h = (60×5280)/(60×60) = 316800/3600 = 88 ft/sec
Now, The distance travelled by vehicle before the driver initiates physical response is equal to Lag distance. i.e
Lag distance = V × t
we substitute
Lag distance = 88 ft/sec 3.5 sec
Lag distance = 308 ft
Therefore, the distance travelled by the vehicle, before the driver initiates a physical response is 308 ft
What new details are you able to see on the slide when the magnification is increased to 10x that you could not see at 4x
Answer: A more detailed information like the nucleus of cells on the slide is seen as the magnification Increases.
Explanation:
The microscope is an instrument used in a laboratory to view magnified image of an object ( cells on a slide). There are two types:
--> Simple microscope and
--> Compound microscope.
Simple microscope is used to view an object using JUST ONE convex lens, and the image formed is usually erect and magnified.
Compound microscope has a higher magnification compared to a simple microscope. It is produced by using TWO CONVERGING LENS of short focal length. Here, the two lenses used are classified according to their positions. The lens near the object is called the objective lens while the one nearer to the eye is called the eyepiece lens.
The objective lens of the compound lens used in the laboratory has ×4, ×10, ×40, ×100 magnifications. As the magnification of the objective lens is increased from ×4 to ×10 a more detailed information of the image is seen as the diameter of field of view decreases. For example the constituents of a cell like the nucleus can be viewed using a higher magnification.
Does the KE of a car change more when it accelerates from 22 km/h to 32 km/h or when it accelerates from 32 km/h to 42 km/h
Answer:
The change in kinetic energy (KE) of the car is more in the second case.
Explanation:
Let the mass of the car = m
initial velocity of the first case, u = 22 km/h = 6.11 m/s
final velocity of the first case, v = 32 km/h = 8.89 m/s
change in kinetic energy (K.E) = ¹/₂m(v² - u²)
ΔK.E = ¹/₂m(8.89² - 6.11²)
= 20.85m J
initial velocity of the second case, u = 32 km/h = 8.89 m/s
final velocity of the second case, v = 42 km/h = 11.67 m/s
change in kinetic energy (K.E) = ¹/₂m(v² - u²)
ΔK.E = ¹/₂m(11.67² - 8.89²)
= 28.58m J
The change in kinetic energy (KE) of the car is more in the second case.
A 15.0 kg bowling ball rolling at 3 m/s is stopped by a constant force of 11.2 newtons. Calculate the time the force must act on the bowling ball to stop it.
Answer:
4.01 seconds
Explanation:
Given that:
Mass of ball = 15kg
Initial velocity, u = 3m/s
Final velocity, v = 0
Force, F= 11.2 N
Change in velocity, dv = 3 - 0 = 3
Time force must act on the ball before stopping it:
Using the relation :
F = ma
a = (v - u) / t
Ft = m(v - u)
11.2 * t = 15 * 3
11.2t = 45
11.2t = 45
t = -+¯ 45 / 11.2
t = 4.01
t = 4 seconds.
6. What is the complete spectrum of all forms of light?
a. galaxy
b. electromagnetic spectrum
C. energy
d. system
Answer:
b. the electromagnetic spectrum
Explanation:
the electromagnetic spectrum contains all the forms of light, including gamma rays, x-rays, ultraviolet radiation, visible light, infrared, radio waves, microwaves, etc