Answer:250,000
Explanation:
How many half lives will it take for 300 grams of Carbon-14 to decay to 18.75 grams?
Answer:
16
Explanation:
300/18.75
A bullet is fired with a speed of 720 m/s.
a.What time is required for the bullet to strike a target at a position +324 m?
b.What is the velocity in km/h?
Answer:
0.9s
2592km/hr
Explanation:
Given parameters:
Final velocity of the bullet = 720m/s
Distance covered = 324m
Unknown:
Time for the bullet to strike a target = ?
Velocity in km/h
Solution:
To solve this problem, we use the kinematics equation shown below:
S =( [tex]\frac{v + u}{2}[/tex]) t
So;
324 = [tex]\frac{720 + 0}{2}[/tex] t
324 = 360t
t = 0.9s
B. to convert this velocity to km/hr
1000m = 1km
3600s = 1hr
720 x m x [tex]\frac{1}{s}[/tex] x [tex]\frac{1km}{1000m}[/tex] x [tex]\frac{3600s}{1hr}[/tex] = 2592km/hr
Please help! Will mark brainliest.
Answer:
736.2
Explanation:
Work = mass * gravity * height
W = m * g * h
W = 6.26 * 9.8 * 12
W= 736.176 Joules
Rounding to 736.2.
A water rocket of mass 2.5 kg is launched vertically upwards from the surface of the Earth. It produces a steady thrust of 75 N. What is its acceleration?
Answer:
a = 30 [m/s²]
Explanation:
To solve this problem we must use Newton's second law, which tells us that the sum of forces on a body is equal to the product of mass by acceleration. In this way, we have the following equation.
∑F = m*a
where:
m = mass = 2.5 [kg]
a = acceleration [m/s²]
F = force = 75 [N]
Now replacing:
[tex]75=2.5*a\\a=75/2.5\\a=30[m/s^{2} ][/tex]
A5 kg frisbee is thrown from rest to a final speed of 12 m/s. What is the impulse of the frisbee?
Answer:
60kgm/s
Explanation:
Given parameters:
Mass of frisbee = 5kg
Final speed = 12m/s
Unknown:
Impulse of the frisbee = ?
Solution:
The impulse of the frisbee is the same as the change in momentum.
It is given as:
Impulse = mass (Final velocity - Initial velocity)
Impulse = 5(12 - 0) = 60kgm/s
What is the speed of a baseball that travels 49 meters in 2.8 seconds?
(I will mark first answer Brainliest!)
Answer:
49 meter per second is the speed of the baseball
Explanation:
thank me later
Ans: 10.0096 cm
What should be the initial lengths of steel and copper rods so that the length of steel rod is 5 cm
larger than the copper rod at all temperatures?
An iron sphere has a radius of 10 cm at a temperature of 0°C. Calculate the change in volume of the
Ans: 1.383 cm
sphere it is heated 100°. 9.3710-
Ans: 17 cm, 12 cm
Answer:
dab is the answerjdjdjnejee
A train travels 25km in 5 hrs. How fast is the train going?
Answer: 5km per hour
If the train is going 25km in 5 hours, you can figure out how many kilometers per hour it is traveling by dividing 25km by the 5 hours.
25/5 = 5km per hour
Explanation:
Answer:
its 60
Explanation:
it just is man
Which are characteristics of electromagnetic waves? Check all that apply.
They travel only through matter.
Waves with a higher frequency have a shorter wavelength.
Waves with a higher frequency have a longer wavelength.
They all move at the same speed.
They can travel through space.
Answer:
2,4,5
Explanation:
Answer:
2,4,5
Explanation:
I got it right on edge 2021
The equation most often associated with Newton's Second Law of Motion is
Answer here
Answer: F=ma
Explanation:
PLEASE HELP 100 POINTS
If the simple machine reduces the amount of force, what must be increased? (Think of using an inclined plane)
the size of the simple machine
the speed of the input force
the work the simple machine performs
the distance over which the force is applied
If the simple machine reduces the amount of force, what must be increased the size of the simple machine.
What is force?A force in physics is an effect that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
An object that transfers and alters force is a machine. Machines come in a variety of forms, such as incline planes, levers, wheel and axles, pulleys, and gears. • The mechanical advantage provided by a machine is the same as the output force. divided by the input force (load)
If the simple machine reduces the amount of force, what must be increased the size of the simple machine.
To learn more about force refer to the link:
brainly.com/question/13191643
#SPJ2
What is the Density of a 150g irregularly shaped rock that displaces 25 ml of water, when it is dropped into a
graduated cylinder?
Answer:
6 g/mL
Explanation:
given:
mass = 150g
volume = displaced volume of water = 25 mL
recall that density = mass / volume
density = 150g / 25 mL = 6 g/mL
17. A ball falling from a building has a kinetic energy of 2000 J and potential
energy of 2376 J. What is the mechanical energy of the ball?
Imc
Answer:
C. 4736J
Explanation:
The mechanical energy of ball is the sum of its kinetic energy and potential energy at any point;
Mechanical energy = kinetic energy + potential energy
Given:
kinetic energy = 2000J
potential energy = 2376J
So;
Mechanical energy = 2000J + 2376J = 4736J
Look at the graph. How many minutes is the sample COMPLETELY a liquid?
Answer:
2 minutes
Explanation:
From the graph, it takes 2 minutes for the piece of ice to go to the completely liquid phase.
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nice, hey could u look at my recent question
what would happen if a sedimentary rock get exposed to high temperatures and presure
2) A bully is pushing a boy against a locker as shown with a force of
500N. The angle between his arms and the ground is 40°. Draw a free-body diagram of
the boy and then find the normal force between the boy and the wall.
HELP
Answer:
pull out the 9
Explanation:
Which is considered computer storage
The options are application Hard drive input and software
Answer:
Second Option
Explanation:
The "hard drive" or the second option is one of the main components of storing information on a computer. You already have a hard drive built into your computer, or laptop when you buy it, and you can buy additional hard drives in the form of plugins that can store even more data if your original hard drive becomes full of data.
Hope this helps.
Answer:
B
Explanation:
Whereas memory refers to the location of short-term data, storage is the component of your computer that allows you to store and access data on a long-term basis. Usually, storage comes in the form of a solid-state drive or a hard drive.
What would happen to the tides of the moon was twice as massive it is currently?
Answer:
the tides would be twice as big as they are now and the world would flood
Explanation:
The tides would be twice as massive as currently if moon was twice as massive it is currently.
What is tidal force?The tidal force is a gravitational effect that stretches a body along a line towards the center of mass of another body due to a gradient in the gravitational field from the other body.
A body stretches as a result of this disparity. As a result, in addition to being a byproduct of the gravitational field, the tidal force is also referred to as the differential force.
The nearest side is pulled more strongly than the farthest side because the gravitational field imposed on one body by another is not consistent across its portions.
As tidal force is a kind of gravitational force, it linearly depends on the mass of the moon. So, the tides would be twice as massive as currently if moon was twice as massive it is currently.
Learn more about tidal force here:
https://brainly.com/question/6762160
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Which of the following is an example of potential energy?
o The energy a baseball has because of its motion,
The energy a spring has by being compressed
The energy an object gains by increasing its temperature,
The energy of an electromagnetic.
Answer:
The energy a spring has by being compressed.
Explanation:
Potential energy is stored energy, whereas kinetic energy is the energy of moving things.
HELP!!!!!
Explain how the sea star reproduce and why the fisherman returned to more sea stars. (page 29 - 32) (book in case needed: california inspire science reproduction of organisms grade 6 integrated unit 2 student edition) (Two parts for full points - 10 points for how the sea star reproduces including what it is called and 10 points to explain why the fisherman found more stars.) <----- That is part of a question not the points i can give you,
Answer:
A sea star that has the ability to regenerate amputated limbs must first undergo a repair phase to heal the exposed wound. Once the wound is healed, the sea star can begin to generate new cells, which in turn, sparks new growth. Regeneration can take anywhere from several months to years. Reproduction: Sea stars are broadcast spawners. Males release sperm into the water and females release eggs. The fertilized eggs hatch into a larval form that lives as plankton, sometimes for months, before settling on the sea floor in its adult form..
What are some ways to deal with stress? HELP
Answer:
dear the other side is the hardich the value that indicates that the other hand if one of triangle ABC news and information or have any further information on the value of x the ki friend my dear the ki aadami you are girl or by phone
Answer:
play games
do meditation
take a long breath
be calm and relax
share your stress
get help from elders
3. Canopus is 313 light years from Earth. How old is the light that we are currently seeing?
Answer:
lícita; de navegar y comerciar; de peticionar a las autoridades; de entrar, permanecer, transitar y salir del territorio argentino; de publicar sus ideas por la prensa sin censura
Conservation of energy says the kinetic energy and the potential energy for each trial should be equal. true or false answer fast
Answer:
true
Explanation:
this is because potienal energy is energy that is stored, and kinetic is energy being used, as kinetic is used, potential is also being used.
while sitting in class your body exerts a force of 600 N on your chair , how much work do you do ?
Answer: 0
Explanation: Work is force times displacement so although you're exerting a force on the chair since your not moving there is no displacement and anything times a value of zero is zero
if the mass of the object is tripled and the speed is doubled then the kinetic energy will change by a factor of
Answer:
New kinetic energy = 12 times of the initial kinetic energy.
Explanation:
The kinetic energy of an object is given by :
[tex]K=\dfrac{1}{2}mv^2[/tex]
Where
m is mass of the object
v is speed of the object
ATQ,
If the mass of the object is tripled, m' = 3m
Speed is doubled, v' = 2v
New kinetic energy will be:
[tex]K'=\dfrac{1}{2}m'v'^2\\\\K'=\dfrac{1}{2}\times 3m\times (2v)^2\\\\=\dfrac{1}{2}\times 3m\times 4v^2\\\\=12\times \dfrac{1}{2}mv^2\\\\K'=12\times K[/tex]
So, the new kinetic energy will become 12 times of the initial kinetic energy.
What does psychophysics study?
unusual discoveries in laboratory experimentations
the laws of physics and how believable they are
people's reactions and perceptions to stimuli
Answer:
people's reactions and perceptions to stimuli.
Explanation:
Psychophysics can be defined as the scientific study of people's reactions and perceptions to stimuli.
Stimulus can be defined as an obvious change in either the chemical or physical structure of an organism' environment (either external or internal). Thus, all living organisms (humans) respond to changes in their environment and consequently, an appropriate response or reaction is made. Also, stimulus arising from within the organism is known as internal stimulus while those from its environment are known as the external stimulus.
In organisms, the specialized cells that detect stimulus are generally known as sensory receptors while a group of these receptors is referred to as sense organ.
Hence, psychophysics is a branch of psychology and it is typically focused on determining the effects of stimuli on the mental health or processes of humans.
Answer:
study of people's reactions and perceptions to a stimulus.
Explanation:
Before the emergence of psychology, psychophysics was the more common practice. Psychophysics is the study of people's reactions and perceptions to a stimulus. For example, when you hear a bell ring, do you act startled, blink your eyes, turn your head, or do nothing? Psychophysicists were interested in people's five senses and how those senses responded to stimulation from elsewhere. Tests were administered to people to try to understand mental phenomena.Psychophysicists wanted to know what people's reactions would be. For example, if a bell rang twenty times, how well did a person hear that sound and did the person find that sound pleasant?
In modified PE football, the quarterback can only run with the ball if
A The quarterback has no open receivers
B Time runs out
C Another player on the offense touches the ball before the play starts
D it is 4th down
Answer:
its c i just did the test
Explanation:
A student carries a backpack for one mile , another student carries the same back pack for two miles . Compared to the first student , how much work did the second student do ?
Answer:
he did twice as much since the first student carried the backpack for 1 mile whilst the second one carried it for 2 miles
Explanation:
Answer:
2miles-1mile
the second person carried the for one mile longer.
So as your sentence you would sat
Compared to the first person the second person carried the backpack one mile longer.
The speed of light is 3 x 10^8 m/s. If its frequency is 4.11 x 10^4 Hz, what is its wavelength?
Answer:
21'8
Explanation: