How many atoms are represented by the formula CaF2? A. Four B. Five C. Two D. Three
Answer:
C?
Explanation:
There's 2 different atoms, Ca and F. Unless it's counting the whole thing... then three? (Ca + 2 F atoms)
Simple explanation of string theory, please don’t plagiarize.
what is the difference between mass and weight
Answer:
The mass is essentially "how much stuff" is in an object. ... Weight: There is a gravitational interaction between objects that have mass. If you consider an object interacting with the Earth, this force is called the weight. The unit for weight is the Newton (same as for any other force).
Explanation:
Answer:the difference is weight is the force exerted from an object by gravity
Explanation:
And mass is how much “stuff” is in an object
2. The motion of roller coasters depends upon the conversion of potential
and kinetic energy. A 200 kg car starts from rest at the top of a hill with a
height of 30 m.
Which of the following is this car's kinetic energy at the bottom of the hill?
Answer:
58,800 Joules
Explanation:
I used the formula for Potential energy which is PE = mgh
200 kg x 9.8 m/s^2 x 30 m = 58,800 J
At the very tops of the rollercoaster is maximum PE which is 58,800 J and 0 J of KE, but at the very bottom is maximum KE (kinetic energy) which is 58,800 Joules but 0 J of PE. This is because energy can not be destroyed ONLY converted
When something causes an object to vibrate at its natural frequency
Explanation:
object tends to vibrate at one particular frequency called the natural frequency. The measure of natural frequency depends on the composition of the object, its size, structure, weight and shape.
A phenomenon , in which the natural frequency of a body becomes equal to the frequency of an external periodic force and amplitude of vibrations becomes very large is called resonance .
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convertion of unit 8.28x10^-2ft m
Answer:
yes
Explanation:
no
did anyone do the, kinetic energy lab report in physics?? plzzz help a girl outttttttt i need answerss????ill give you as much brainlist or points
Answer:
yes
Explanation:
what is clinograph and how to read it
Answer:
Explanation:
A climograph is a graphical representation of a location's basic climate. Climographs display data for two variables:
(a) monthly average temperature
(b) monthly average precipitation. These are useful tools to quickly describe a location's climate.
A freshman's mass is 44.8kg, therefore the freshman’s weight is ___N.
is a term that refers to the amount of space that a substance or an object take up
Answer: yes and its called either mass or volume.
Explanation: volume is the space inside the object is taken up, and mass is bassicaly the same thing but with weight
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Which has more momentum: a 3 kg sledgehammer swung at 1.5 m/s OR a 4 kg sledgehammer swung at 0.9 m/s? SHOW YOUR WORK FOR BRAINLEST
Answer:
3kg sledgehammer swung at 1.5 m/s
Explanation:
Small Sledgehammer:
Mass:3.0
Velocity:1.5
MASS×VELOCITY=MOMENTUM
3.0×1.5= 4.5 (momentum)
Large Sledgehammer:
Mass:4.0
Velocity:0.9
4.0×0.9=3.6 (momentum)
higher momentum is the smaller Sledgehammer.
Why is all of geologic time before the Cambrian Period sometimes collectively lumped together and called the “Precambrian"?
Answer:
we have very few fossils from the time
Explanation:
We have few rock and fossil records that still exist from that far back, and so it is difficult to know what the conditions were like.
It was on the quiz
All of the geologic time before the Cambrian Period is sometimes collectively lumped together because it's impossible to determine the conditions of rock and fossil records
What is Precambrian?Precambrian refers to the time period between the beginning of the Earth's formation (approximately 4.6 billion years ago) and the start of the Cambrian Period.
In conclusion, there are few rock and fossil records from that time period, so it's impossible to determine what conditions were like.
Read more about Earth
https://brainly.com/question/24878669
As water rises through the troposphere and cools, it changes from a(n) ————- to a(n) ———— through the process of condensation; when the tiny drops of water come together, they form ————- .
Answer:
GAS, LIQUID, CLOUDS
Explanation:
Water can be in three states: solid, liquid and gas, passing from one to another depending on the pressure and temperature.
In this complementation exercise.
When the water cools down the GAS goes to the LIQUID state, these small drops unite and form the CLOUDS
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further from I didn't know the answer
Answer:
it might be b, good luck
Explanation:
not too sure
A 0.55 kg soccer ball is kicked with a force of 15 N for 0.25 seconds. The ball was at rest before the kick. What is the speed of the soccer ball after the kick?
Answer:
Check pdf
Explanation:
Why do other stars look much dimmer than the sun?
1. Four students investigated the effect of gravity on falling objects. The students all used the same three balls and dropped them from a height of 8 meters. They recorded the time it took for each ball to hit the ground. Which student most likely had an error in the results?
(1 point)
Ziva
Jade
Owen
Eduardo
2.A student designs an investigation to study the effect of gravity on objects on Earth. He will use the criteria shown. How can the student improve the investigation?
(1 point)
by dropping the balls from the same height
by using balls that are the same mass
by finding balls made from different materials
by measuring the circumference of the balls
Answer:
1.Owen
2.By dropping the balls from the same height
3.She dropped the balls from different heights
4. Perform a second trial
To construct a non-mechanical water meter, a 0.500-T magnetic field is placed across the supply water pipe to a home and the Hall voltage is recorded.
Required:
a. Find the flow rate through a 3.00-cm-diameter pipe if the Hall voltage is 60.0 mV.
b. What would the Hall voltage be for the same flow rate through a 10.0-cm-diameter pipe with the same field applied?
Answer:
a. 4 m/s b. 0.2 V
Explanation:
a. Find the flow rate through a 3.00-cm-diameter pipe if the Hall voltage is 60.0 mV.
The hall voltage V = vBd where v = flow-rate, B = magnetic field strength = 0.500 T and d = diameter of pipe = 3.00 cm = 0.03 m
Since V = vBd
v = V/Bd given that V = 60.0 mV = 0.060 V, substituting the values of the other variables, we have
v = 0.060 V/(0.500 T × 0.03 m)
v = 0.060 V/(0.015 Tm)
v = 4 m/s
b. What would the Hall voltage be for the same flow rate through a 10.0-cm-diameter pipe with the same field applied?
Since the hall voltage, V = vBd and v = flow-rate = 4 m/s, B = magnetic field strength = 0.500 T and d' = diameter of pipe = 10.0 cm = 0.10 m
Substituting the variables into the equation, we have
V = vBd
V = 4 m/s × 0.500 T × 0.10 m
V = 0.2 V
A ray diagram is shown.
A flower is an object in front of a convex mirror. A ray parallel to the principal axis reflects away from the focal point. The second ray goes to the mirror toward the focal point and reflects parallel to the principal axis. The reflected rays are continued onto the other side of the mirror as dashed lines. At the intersection of the two dashed lines is a small upright image of the object in front of the focal point.
Which describes the image?
It is virtual and in front of the mirror.
It is virtual and behind the mirror.
It is real and in front of the mirror.
It is real and behind the mirror.
Answer:
B. Its virtual and behind the mirror.
Explanation:
Answer: (B) Virutal, (D) Upright, (E) Smaller.
Explanation:
Edge Physics B
A cube measures 2.5 cm in height and has a density of 3.0 g/cm³. What is the mass?
Answer: mass: 46.875 g
Explanation:
[tex]density = \frac{mass}{volume}[/tex]
density = 3.0 g/cm^3
volume (lwh are all 2.5 since it is a cube) = 2.5^3 = 15.625
mass = ?
[tex]3 = \frac{mass}{15.625}[/tex]
mass = 3*15.625 = 46.875
A 0.17 kg ball on a 0.70 m string rotates in a circular path in a vertical plane. If the angular speed of the ball at the bottom of the circle is 7.0 rad/s, what is the force that maintains circular motion?
A. 5.6 N
B. 7.5 N
C. 1.7 N
D. 1.2 N
If 14 waves pass one dock every 16.0 seconds determine the period
Aswser: They can be transverse or longitudinal. However, all waves have common properties—amplitude, wavelength, frequency, and speed. Amplitude describes how far the medium in a wave moves. Wavelength describes a wave's length, and frequency describes how often it occurs.
In some areas, hydroelectric power is not geographically appropriate and a different renewable energy source would be a better option. A conservation group is looking for renewable energy sources other than hydroelectric energy that could be used to generate electricity in grassland ecosystems, such as in the midwestern United States or in a savanna in Africa.
Required:
a. Propose a different renewable resource to use that would be a realistic solution to generating electricity without using fossil fuels or hydroelectric power in a grassland ecosystem.
b. Justify the solution proposed above by explaining a potential advantage of using a different renewable resource to generate electricity.
Answer:
a) wind power system, turbines powered, solar power system
b) the possibility of creating jobs for the local workforce and of maintaining the environment without damaging it.
Explanation:
In a grassland system it may not have great changes in height or mountain system where it is easy to represent a river, therefore a hydroelectric power system is not very feasible.
a) You can have several alternative energy systems.
* If there is a fairly constant air current, a wind power system could be implemented.
* If there is a river with an acceptable flow, a generation system can be implemented with turbines powered by the river flow.
* Another system is a solar power system
b) To select any of the possible systems proposed, the current and future energy requirements of the region must be analyzed.
The amount of energy that each proposal can supply
Analyze the installation costs and the economic benefits of a given system.
Study the possible problems for the maintenance of each system.
A great advantage of these systems is the possibility of creating jobs for the local workforce and of maintaining the environment without damaging it.
The most plausible renewable energy source in a grassland is wind energy.
Renewable energy refers to energy that is obtained from wind, water biomass or underground heat. All of these sources of energy are inexhaustible and hold great prospect to solving the current energy deficit is many parts of the world.
In grasslands, the most plausible renewable source of energy is wind. Winds are abundant in grasslands . It is more plausible than hydroelectric power because it does not create any adverse environmental impact. It is the cleanest energy source.
Learn more about renewable energy: https://brainly.com/question/4038933
What happens when weathering and erosion work together?
A. New mountains are created
B. The climate changes overnight
C. Metal objects become rusty
D. They change the earths surface
Plssss help
Answer:
A. New mountains are created
Solve for x in the diagram below.
(4.2 + 50°
150
T =
Answer:
x = 25
Explanation:
Find the diagram attached
From the diagram,
4x + 50 = 150 (vertically opposite angle)
4x = 150 - 50
4x = 100
x = 100/4
x =25
Hence the value of x is 25
sun *
a.) the hunter
b.) Pole Star
c.) little bear
d.) pattern of stars
e.) nearest star
Plz help :> <3
Answer:
E
Explanation:
Why should we invest more money in renewable energy resources
Answer:
It is the smarter option.
Explanation:
Renewable energy is the cheapest source of new power generation for more than two-thirds of the world and has no fuel costs. It can reduce the economic burden of energy bills by eliminating fuel charges — especially when coupled with energy-efficiency upgrades in our homes and businesses.
How is Newtons second law apply to the egg drop ?
Answer:
Newton's Second Law is applied because of the acceleration caused by natural forces as the egg is plummeting to the earth. And the amount of acceleration the egg has will be largely affected by the amount of force Mr. Baker uses to hurl the egg to the ground.
Explanation:
hope that helps
What is the total resistance of the circuit shown below?
Answer:36
Explanation:To analyze a series-parallel combination circuit, follow these steps: Reduce the original circuit to a single equivalent resistor, re-drawing the circuit in each step of reduction as simple series and simple parallel parts are reduced to single, equivalent resistors. Solve for total resistance.
17. The four points built into the camera to ensure that each exposure can be oriented
to the camera calibration are called?
A.
Nodal points
B.
Focal points
C. Focus
D. Fiducial marks
E. None of the above
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