PLESE HELP!! ILL MARK BRAINLYEST!!
Most of the energy released by nuclear fission is in the form of ________ rays.
A. alpha
B. beta
C. gamma
D. omega
Mark has a ball. He tosses it into the air. In 3.7 seconds, it falls to the ground. Why did this happen to Mark's ball? Explain.
Mark's ball falls to the ground because there is a gravitational pull from Earth's core. There are chemicals and elements in the Earth that make this pull. Mark's ball does not stay in the air for this reason.
Hope this helps you!
Answer:
This happened because there is a gravitational pull.
Explanation:
The earth____ around the sun because the earth___ we have night and day
Answer:
The Earth Revolves around the sun because the Earth Tilts, we have night and day.
Explanation:
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Blank is the change in position of an object
A child’s toy arrow is launched horizontally from a bow at a speed of 8 m/s from a second story window 4 meters above the ground, and the sticks in a pile of sand.
A. How far away is the pile of sand?
B. What were the horizontal and vertical speeds of the arrow when it hits the sand?
C. What angle does the arrow make with the ground when it sticks in the sand?
Why do the positive charges in the sugar grain not move?
1. Because protons are "stuck" in the nucleus, so they don't move between atoms in a material
2.
Because they are attracted by the negative tupperware
3. Because they are repelled by the negative tupperware
4.
Because the positive charges feel no attractive force from the tupperware
Photosynthesis is an example of an exothermic chemical reaction in which plants use sunlight to make glucose and oxygen.
Please select the best answer from the choices provided
от
OF
Answer:
False
Explanation:
If you fire a gun horizontally, and at the same time drop a bullet/slug from the same height, what will happen?
Answer:
There you have it. The y-component of air resistance for the fired bullet still depends on the fired speed of the bullet (since it is proportional to v2). A fired bullet (with air resistance) does not hit the ground at the same time as a dropped bullet.
Explanation:
hope this helped ✨
List three ways a
a home may become more energy efficient.
Answer:
1. Installing solar panels on the roof. This is an example of renewable energy, and solar panels help provide electricity for a home.
2. Using LED lights instead of traditional lightbulbs. The modern LED lights use much less electricity and function up to 90% more efficiently than the traditional lightbulbs.
3. Using rain barrels to collect water from the roof. Installing rain barrels to collect rainwater to water your plants and garden is a great way to save water and cut down on your water bill.
Hope this helps! :)
Calculate the mmoi of a tire that weighs 15.0 kg and has a radius of 30.0 (treat it as a hoop )
Answer:
Kinetic Energy and Work: The mass moment of inertia of the wheel about ... The wheel is made from a 5-kg thin ring and two 2-kg slender ... determine the maximum angular velocity of the wheel if it is ... velocity of the pulley at the instant the 20-lb weight moves ... The spool has a mass of 40 kg and a radius of gyration of.
Explanation:
Which statement accurately describes the atmospheres of the inner planets?
Mars has no atmosphere.
Mercury has a thick atmosphere.
Mars and Venus have similar atmospheres.
Earth and Venus have similar atmospheres.
Answer:
The option your looking for is C- Mars and Venus have similar atmospheres
Answer:
C: Mars and Venus have similar atmospheres.
If a giraffe runs for 30 minutes at a speed of 40 miles per hour, how far will the giraffe run? Please help me
Answer:
20 mi
Explanation:
distance= rate* time
30 min*(1 hour)/ 60 min
.5 hours
(40 mi/hr)(.5 hr)
20 mi
A 10 kg ball is traveling at the same speed as a 1 kg ball. Compared to the 10 kg ball,the 1 kg ball has what?
Answer:
I would say that the 1 kg ball weighs 1 kg. I don't see the answer choices.
2.30 Suppose that the radius of a typical cell is 10 mm and that inside it 106 ATP molecules are hydrolyzed each second. What is the power density of the cell in watts per cubic meter (1 W = 1 J s−1)? A computer battery delivers about 15 W and has a volume of 100 cm3. Which has the greater power density, the cell or the battery?
Answer and Explanation: One ATP release approximately 30.5kJ/mol of energy. Using Avogadro's constant, it is known one mol corresponds to [tex]6.02.10^{23}[/tex] molecules, so 106 ATP molecules releases:
E = [tex]30.5.10^{3}*\frac{106}{6.02.10^{23}}[/tex]
E = [tex]537.04.10^{-20}[/tex]J
A cell is approximately a sphere. Volume of a sphere is given by
V = [tex]\frac{4}{3}.\pi.r^{3}[/tex]
Changing radius from mm to m:
r = [tex]10^{-2}[/tex]m
Then, volume is
V = [tex]\frac{4}{3}.\pi.(10^{-2})^{3}[/tex]
V = [tex]4.2.10^{-6}[/tex] m³
Power density is given by
[tex]power=\frac{energy}{volume}[/tex]
[tex]power=\frac{537.04.10^{-20}}{4.2.10^{-6}}[/tex]
[tex]power=128.10^{-14}[/tex]
power = 12.8.[tex]10^{-15}[/tex] W/m³
Power density for a the cell is 12.8.[tex]10^{-15}[/tex] W/m³.
Power density for battery is
100 cm³ = [tex]10^{-4}[/tex]m³
power = [tex]\frac{15}{10^{-4}}[/tex]
power = [tex]15.10^{4}[/tex]W/m³
Comparing cell and battery, battery has a greater power density.
8. An object accelerates 12.0 m/s2 when a force of 6.0 newtons is applied to it. What is the mass of the object? ___________________________
Answer:
Mass of object is 0.5kg
Explanation:
Given the following data;
Force = 6N
Acceleration = 12m/s²
Mass =?
Force is given by the multiplication of mass and acceleration.
Mathematically, Force is;
[tex] F = ma[/tex]
Where;
F represents force.
m represents the mass of an object.
a represents acceleration.
Making mass (m) the subject, we have;
[tex]Mass (m) = \frac{F}{a}[/tex]
Substituting into the equation;
[tex]Mass (m) = \frac{6}{12}[/tex]
Mass, m = 0.5kg.
Therefore, the mass of the object is 0.5kg
a cricket ball is hit so that it travels straight up in the air and it require 3 second to reach the maximum height its initial velocity is
Answer:
v = u - gt
At maximum heitht, v = 0
0 = u - (9.8)(3)
u = 29.4 m/s initial velocity
When soda bottles are sealed in a factory, the bottles are all the same temperature with the same pressure of gas inside. A student decides to perform an experiment to determine what changes will result from adjusting the temperatures of two sealed soda bottles. One bottle of soda is heated, while the other is cooled.
Which statement describes a result of the experiment?
Answer: changes will result from adjusting the temperatures of two sealed soda
Explanation:
the preasure builds up and makes the bottle expand so it might crack but the other one will become ice then will crack the sides
Answer:
changes
Explanation:
A student is standing on a very steep hill, kicks a soccer ball horizontally with a speed of 10 m/s toward a student who is sitting on a level field 3 meters below. How long does it take the soccer ball to strike the ground?
Answer:
0.782 seconds
Explanation:
We are given that the ball starts out on a hill that is 3 m above a level field below. And that the ball is kicked horizontally. We are asked how long the ball takes to hit the ground 3 meters below.
On closer consideration of the given situation, it is important to realize that even though the ball starts out with a speed of 10m/s in the horizontal direction, that this will not make a difference in how fast the ball travels in the vertical direction (which is what the question is basically asking for). Hence for this question, we can ignore the initial horizontal speed of the ball and realize that the initial vertical speed is 0 m/s.
Recall that one of the equations of motion can be expressed as:
s = ut + (1/2) at² (refer to attached for reference)
where,
Applied in the vertical direction,
s = vertical distance travelled = 3 meters in this case
u = initial vertical velocity = 0 m/s in this case
a = acceleration due to gravity, g = 9.81 m/s²
t = time taken ( we are asked to find this)
simply substituting the known values above into the equation:
s = ut + (1/2) at²
3 = 0 + (1/2) (9.81)t²
3 = 4.905t²
t² = 3 / 4.905
t² = 0.61162
t = √0.61162
t = 0.782 seconds
Diamonds have a score of 10 on the Mohs scale. Therefore, they are used in grinding belts to buff and smooth other materials. What physical property is demonstrated by this? brainly
Answer:
Hardness
Explanation:
It has a score of 10 on the Mohs scale of HARDNESS
what is the average velocity of a car that travels 30 kilometers due west in 0.50 hour
The average velocity of a car that travels 30 kilometers due west in 0.50 hour - 60 km/hour west.
Average velocity is the displacement of an object with the time change. To find the average speed of an object we divide the distance travelled by the time elapsed.
Velocity is a vector quantity and average velocity can be found by dividing displacement by time.Average velocity is defined as the change in position or displacement (∆x) divided by the time intervals (∆t) in which the displacement occursAverage velocity = ∆x/∆t
Then,
average velocity = 30/0.5
= 300/5
= 60
Thus, the correct answer would be - 60 km/hour west.
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On Earth, a table has a mass of 97 kg. What is its weight?
Answer:
w=mg
Explanation:
w=97×9.8
w=950.6 N
Which type of energy is stored in a battery?
O A. Nuclear energy
O B. Electrical energy
O C. Electromagnetic energy
O D. Chemical energy
Answer:
Chemical energy is in a battery
The type of energy is stored in a battery is Chemical energy (option d)
Batteries store chemical energy. When a battery is charged, a chemical reaction occurs inside it, converting the reactants into different products. This process stores energy in the form of chemical bonds within the battery's components.
When you use the battery to power a device, the reverse chemical reaction takes place, releasing the stored energy as electrical energy. This flow of electrons creates an electric current that powers the device connected to the battery.
The capacity of a battery to store and release energy depends on the type and quantity of chemicals used in its construction. Different types of batteries, such as alkaline, lithium-ion, or lead-acid batteries, have varying chemical compositions, affecting their energy storage capabilities and overall performance.
So, the correct option is (d).
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A bowling bowl rolls 33m with an average speed of 2.5 m/s how many seconds did the ball roll
What are two ways engineers use their understanding of kinetic energy and potential energy to make their designs better/ safer?
Answer:
On a roller coaster, energy changes from potential to kinetic energy and back again many times over the course of a ride. Kinetic energy is energy that an object has as a result of its motion. Traditionally, the coaster cars are pulled up the first hill by a chain; as the cars climb, they gain potential energy.
Mechanical engineers are concerned about the mechanics of energy — how it is generated, stored, and moved. For example, mechanical and civil engineers ensure that there is sufficient potential energy, which is converted to kinetic energy, to move cars along an entire roller coaster ride.
What is kinetic energy ?"Kinetic energy is a form of energy that an object or a particle has by reason of its motion. If work, which transfers energy, is done on an object by applying a net force, the object speeds up and thereby gains kinetic energy."
What is potential energy ?"Potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors."
Potential energy, stored energy that depends upon the relative position of various parts of a system. A spring has more potential energy when it is compressed or stretched. A steel ball has more potential energy raised above the ground than it has after falling to Earth.
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Which of the following statements about large scale mineral extraction is true?
a.
The economic benefits of large scale mineral extraction outweigh the environmental costs.
b.
Large scale mineral extraction is more destructive than in the past.
c.
Large scale extraction is vital to the economy of mining towns.
d.
Mineral extraction cannot be done in ways that do not completely destroy the environment.
Large scale extraction is vital to the economy of mining towns is the correct option.
What is effect of large scale extraction?Large scale extraction is very important to the economy of mining towns because the minerals are very valuable which can be sold at high prices which leads to increase in income of a country but this large extraction also disturbs the surrounding environment.
So we can conclude that Large scale extraction is vital to the economy of mining towns is the right option.
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Answer:
Large scale extraction is vital to the economy of mining towns is right
Explanation:
It is required to design a zener shunt regulator to provide a regulated voltage of about 10 V. The available 10-V, 1-W zener of type 1N4740 is specified to have a 10-V drop at a test current of 25 mA. At this current, its r z is 7 . The raw supply, V S , available has a nominal value of 20 V but can vary by as much as ±25%. The regulator is required to supply a load current of 0 mA to 20 mA. Design for a minimum zener current of 5 mA.
Answer:
jgfsdghjjuk
Explanation:
khhnghjj
Which describes density?
A. amount of volume for a given object
B. ability of an object to take up space
C. amount of mass in a given volume
D. ability of an object to float in water
Answer:
the answer to your question is C, Amount of mass in a given volume
Explanation:
Answer:
c
Explanation:
Which type of galaxy has arms that contain sites of active star formation and start close to a bulge in the center?
A. elliptical
B. irregular
C. barred spiral
D. normal spiral
Answer:D:normal spiral
Explanation:
Answer:
D
Explanation:
a car with a mass of 1,100 kg is moving down the highway with an applied force (force of the engine) of 2,450 N and a friction force of 825 N. What is the cars acceleration
Explanation:
2.23 m/s^2 squared yung 2
