Answer:
4000 kg m/s
Explanation:
p=mv
p = momentum in kg m/sm = mass in kgv = velocity in m/ssubstitute values into the formula above to get:
p=1000x4
p=4000 kg m/s
. Calculate the unbalanced force acting on a 0.50 kg toy rocket that accelerates at a constant rate with a velocity of 20 m/s (up) to 45 m/s (up) in 0.7 s.
Answer:
17.85N
Explanation:
Given data
m= 0.5kg
u= 20m/s
v= 45m/s
t= 0.7second
From
F= mΔv/t
substitute
F=0.5*(45-20)/0.7
F=0.5*25/0.7
F=12.5/0.7
F=17.85
Hence the force is 17.85N
What is the gravitational force between the Earth and the Sun? The mass of the Earth is 5.972 x 1024 kg, the mass of the Sun is 1.99 x 1030 kg, and the
distance between the Earth and the Sun is 1.496 x 101 m.
5.295 x 1033N
9881N
O 3.54 x 1022N
5.11 x 1014 N
Which form of electromagnetic radiation with a relatively high amount of energy is used to sanitize lab goggles?
Answer:
sorry
Explanation:
i don't know this but when i find the answer i will type here
Gamma rays of electromagnetic radiation with a relatively high amount of energy is used to sanitize lab goggles.
What are gamma rays?A gamma ray, also known as gamma radiation, is a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves, typically shorter than those of X-rays.
Moreover, gamma rays are the most harmful external hazard. Beta particles can partially penetrate skin, causing “beta burns”. Alpha particles cannot penetrate intact skin. Gamma and x-rays can pass through a person damaging cells in their path.
Therefore, both x-rays and gamma rays are forms of high-frequency (high-energy) ionizing radiation, which means they have enough energy to remove an electron from (ionize) an atom or molecule. Ionizing radiation can damage the DNA (genes) inside a cell. Sometimes this can lead to cancer later on.
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Action-reaction forces are always the same ____ but are in opposite ____
Answer:
Magnitude, direction
Explanation:
Magnitude, direction
Which one of the following is not a balanced equation
Answer:
B
Explanation:
just did the test
Meg has two glasses of grape juice. Glass A has 80 grams of juice at 30 °C. Glass B has 80 grams of juice at 50 °C.
Which of the following steps will make the kinetic energy of the molecules of the juice in both glasses equal?
Decrease the temperature of juice in Glass A by 20 °C
Increase the temperature of juice in Glass A by 20 °C
Decrease the temperature of juice in Glass B by 30 °C
Increase the temperature of juice in Glass B by 30 °C
Answer:
Increase the temperature of juice in Glass A by 20 °C
Answer:
lil baby
Explanation:
You are planning an investigation that explores the properties of matter. Which of the following will help you discover a physical property?
Experiment: place a powder into a beaker that contains a liquid/Result: the beaker gets hotter
Experiment: place a powder into a beaker that contains a liquid/Result: the solid dissolves into the liquid
Experiment: place a powder into a beaker that contains a liquid/Result: the mixture begins to fizz and bubble
Experiment: place a powder into a beaker that contains a liquid/Result: the mixture catches fire and burns down the lab
Answer:
I will post your answer soon
Explanation:
If you are planning an investigation that explores the properties of matter, then experiment: place a powder into a beaker that contains a liquid Result : the beaker gets hotter will help you discover a physical property.
What is experiment ?An experiment is a technique used to confirm or deny a hypothesis, as well as assess the possibility or effectiveness of something that has never been done before. Experiments show what happens when a certain component is modified, which sheds light on cause-and-effect relationships. The purpose and scope of experiments vary widely, but they always rely on a repeatable process and a rational examination of the outcomes. Natural experimental experiments are also a thing.
While a child may conduct simple experiments to better understand how objects fall to the ground, scientific teams may spend years conducting thorough research to increase their understanding of a phenomenon.
This experiment shows enthalpy is positive, heat is absorbed in this experiment. this breaks the atoms and it needed the energy.
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PLEASE HELP !! A 10 ohm resistor is connected to a 9V battery how much current is flowing through the circuit?
Resitance (R)= 10 Ohm
Potential difference (V) = 9V
V= IR
I= V/R
I= 9/10
I= 0.9 Ampere
Therefore 0.9 Ampere of current is flowing through the circuit.
The current through the circuit can be calculated using Ohm's law. The current flowing through the circuit with a resistance of 10 ohm and 9 V is 0.9 ampere.
What is Ohm's law?Ohm's law states that the potential difference or voltage across a circuit is the product of the current and resistance through the circuit. Thus as current or resistance increases, voltage across the circuit also increases.
According to Ohm's law, V= IR.
Given the voltage V = 9 V
Resistance R = 10 ohm
Current = voltage/ resistance (V/R)
= 9 V/ 10 Ω.
= 0.9 A.
Therefore, the current passing through the circuit is 0.9 A.
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TIME REMAINING
09:57:20
A scientist discovers a deep bowl-like divot under the ocean off the coast of eastern Mexico that is many kilometers across. The layers of the ground all around the continent from around the time that structure formed contain large amounts of iridium and a larger number of fossils than is normally found. What most likely caused the bowl-like structure?
a meteorite impact
an asteroid impact
an iridium spike
a Kuiper object impact
Mark this and return
Answer:
answer is an ASTEROID
Explanation:
Iridium is a material that forms at very high temperatures, which is why its presence shows that in the impact zone the temperature rose a lot, so we can imagine that the impact was by a body traveling at high speed, which is consistent with a body that comes from space.
An asteroid is a celestial body of some size that when entering the atmosphere heats up and collides with the Earth, leaving a crater that in general is much larger than the diameter of the object.
A meteorite is a small fraction of an asteroid that has been separated by the pressure of the sun, the attraction of the Earth, Moon or another massive body or a combination of these effects, in general, meteorites are small and when they enter the atmosphere They are consumed by heat and very few reach the surface of the Earth, those that do reach are very small.
Therefore due to the size of the crater and the existence of many dead animals around the body must have been very heavy, so the correct answer is an ASTEROID
Answer:
B) An asteroid impact
Explanation:
Why does the Moon appear red during a lunar eclipse?
1.)Because the sunlight bends as it passes through the Earth's atmosphere
2.)Because the sunlight bends as it passes through the Moon's atmosphere
Answer:
Image result for Why does the Moon appear red during a lunar eclipse?
A lunar eclipse takes place when the sun, Earth and moon line up in space. The moon passes through Earth's shadow. ... Bottom line: The moon can look red during a total lunar eclipse because of sunlight that's filtered and refracted by Earth's atmosphere
An initially motionless test car is accelerated to 115 km/h in 8.58 s before striking a simulated deer. The car is in contact with the faux fawn for 0.815 s, after which the car is measured to be traveling at 60.0 km/h. What is the magnitude of the acceleration of the care before the collision? What is the magnitude of the average acceleration of the car during the collision?
Answer:
a) a = 3.72 m / s², b) a = -18.75 m / s²
Explanation:
a) Let's use kinematics to find the acceleration before the collision
v = v₀ + at
as part of rest the v₀ = 0
a = v / t
Let's reduce the magnitudes to the SI system
v = 115 km / h (1000 m / 1km) (1h / 3600s)
v = 31.94 m / s
v₂ = 60 km / h = 16.66 m / s
l
et's calculate
a = 31.94 / 8.58
a = 3.72 m / s²
b) For the operational average during the collision let's use the relationship between momentum and momentum
I = Δp
F Δt = m v_f - m v₀
F = [tex]\frac{m ( v_f - v_o)}{t}[/tex]
F = m [16.66 - 31.94] / 0.815
F = m (-18.75)
Having the force let's use Newton's second law
F = m a
-18.75 m = m a
a = -18.75 m / s²
I know the answer but what type of energy is this.
Answer:
Elastic potential energy
Explanation:
Answer:
elastic energy
Explanation:
PLEASE HELP WILL GIVE BRAINLIEST (I NEED TWO PICKED) PLZzZZZZ AND THxS
Answer:
A and B
Explanation:
They contain Chlorophyll
They are relatively tall
PLS ANSWER FAST WILL GIVE BRAINLY!!!
how do scientist measure mass of an atom?
Question 5 of 10
A dog pushes against the front door for 3 seconds with a force of 88 N. What
impulse has the
dog applied to the door?
A. 264 kg•m/s
O B. 77.2 kg•m/s
O C. 29.3 kg•m/s
OD. 128 kg•m/s
SLEMT
Answer:
265 Kg.m/sExplanation:
Impulse = Force × time
So 88× 3 =264!!
Answer:
264 kg*m/s
Explanation:
what is the momentum of a bicycle with a mass of 18 kg traveling at 20 m/s?
Answer:360 kg m/s
Explanation:Momentum refers to an object's quantity of motion.
Formula for Momentum: p=mv
p = refers to the momentum
m = refers to the object's mass (this is represented by the unit kg or kilogram)
v = this refers to the object's velocity (this is represented by the unit m/s or meter per second)
So, given that the bike has a mass of 18 kg and is traveling at 20 m/s, then you can already get the momentum by multiplying both of these values.
p = the bike's momentum (what is being asked here)
m = 18 kg
v = 20 m/s
Thus, p = 18kg × 20 m/s = 360 kg m/s
The bike's momentum is 360 kg m/s.
Brainlist please
Temperature and Thermal Energy
Quiz
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47:44
What happens when the thermal energy of a substance increases?
The motion of the particles in the substance increases, and the temperature of the substance decreases.
The motion of the particles in the substance decreases, and the temperature of the substance increases.
O Both the motion of the particles in the substance and the temperature of the substance decrease.
Both the motion of the particles in the substance and the temperature of the substance increase.
Answer:
the temperature increas
PLEASE Help! Physics Question
Answer:
hundred metre race on sports day started by a gun firing when the gun is fired a pop of smoke comes out of the gunners will you suggest about trigonometry right here is the sound of the explosion before or at it seems of of smoking containers out of the governor ke this answer about something I don't know I am sorry
Which muscles help you sit up from laying down?
Answer: abdominal muscles.
Explanation:
A box has a 20 N force applied to it to move it 5 m. What is the work done on the box? 4 J 4 N 25 J 100 J
Abby is writing a biography of Isaac Newton. He was a brilliant English scientist who developed the law of universal gravitation in the 1600s. Newton also developed laws of motion and ideas about inertia. His laws and ideas were used in many subjects such as physics, astronomy, and mathematics. Explain inertia using Newton's first law of motion. Give an example of inertia.
Answer:
Over several years, Newton worked until he had developed the law of universal gravitation, which debuted in his book Mathematical Principles of Natural Philosophy (1869). This idea stood until the concepts of quantum theory and relativity were posed in the mid 19th century.
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A free body diagram represents all of the following except:
a)the object
b)forces as vectors
c)forces exerted by the object
d)forces exerted on the object
Answer:
c
Explanation:
A free body diagram doesn't show forces exerted by the object.
A free body diagram represents all the given choices except the one which is "forces exerted by the object"
Diagrams that represent the approximate magnitude as well as the direction of all pressures exerted on either an item throughout a particular condition.Drawing such a free-body schematic or the model seems to be a key step towards pattern recognition throughout mechanical because it allows you to see every one of the influences operating on a particular element.
Thus the above answer is right.
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A bike travels at 120 meters in 60 seconds. What is the speed of the bike?
Answer:
2 m/s
Explanation:
Help me please
There’s 2 questions.
Answer:
50 Joules of work on the system Total distance is 1m W= F ×D 50 Joules = F × 1m F= 50 Newtons W= 1234 J D= 451234= F × 45 meters F= 27.42 Newtons I do exams and quizzes if ur interestedWhich statement best describes the movement of atoms in a solid?
They are able to slide past each other.
They spread apart as far as possible.
They have no freedom to move.
They are free to move in all directions
Answer:
I know I am super super late but it is C my guy :))
Explanation:
Have a nice day!!
A hair dryer transfers 48K J of energy in one minute. What is the power rating of the hairdryer? *
Answer:
800W
Explanation:
48,000/60=800
The power rating of the hairdryer is 800W.
What is Power?Power can be defined as the rate at which work is done by an object. The S.I unit of power is Watt(W).
The formula of power will be
Power = Work done/time
A hair dryer transfers 48K J of energy in one minute.
1 minute = 60 seconds
P = 48,000/60
P = 800 W
Hence, the power rating of the hairdryer is 800W.
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A car starting from rest accelerates in a straight line at a constant rate of 5.5m/s for 6s.If the car after this acceleration slows down uniformly at a rate of 2.4m/s, how long does it take to stop
Answer:
The time it takes to stop is 13.75 seconds
Explanation:
A body moving with constant acceleration, 'a', for a time, 't', has a final velocity, 'v', given by the following kinematic equation;
v = u + a·t
Where;
v = The final velocity of the body
a = The acceleration of the body
t = The time of acceleration (accelerating period) of the body
u = The initial velocity of the body
The given parameters for the acceleration of the car are;
The initial velocity of the car, u = 0 m/s (a car starting from rest)
The constant acceleration of the car, a = 5.5 m/s²
The acceleration duration, t = 6 s
Therefore, we have;
The final velocity of the car after the acceleration, v = 0 m/s + 5.5 m/s² × 6 s = 33 m/s
The final velocity of the car after the acceleration, v = 33 m/s
When the car slows down uniformly, and comes to a stop (final velocity, v₂ = 0 m/s), it has a constant negative acceleration, (deceleration) '-a₂'
The given parameters when the car slows down are;
The deceleration, -a₂ = 2.4 m/s²
The final velocity, v₂ = 0 m/s
The initial velocity, u₂ = v = 33 m/s
The time it takes to stop = t₂
-a₂ = 2.4 m/s²
∴ a₂ = -2.4 m/s²
From, v = u + a·t, we have;
v₂ = v + a₂·t₂
By plugging in the values of the variables, we have;
0 m/s = 33 m/s + (-2.4 m/s²) × t₂
∴ 2.4 m/s² × t₂ = 33 m/s
t₂ = 33 m/s/(2.4 m/s²) = 13.75 s
The time it takes to stop, t₂ = 13.75 seconds
What is the velocity of a ball that is thrown in the air 16 meters? The ball reaches the ground in 25 seconds
v = d/t
please be quick
Answer:
0.64
Explanation:
v = d/t
v= 16/25
v= 0.64
A steel ball bearing is released from a height H and
rebounds after hitting a steel plate to a height H.
What is true about the collision with the steel plate?
Answer:
ELASTIC collision
kinetic energy is conservate
Explanation:
As the ball bounces to the same height, it can be stated that the impact with the floor is ELASTIC.
As the floor does not move the conservation of the moment
po = pf
-mv1 = m v2
- v1 = v2
So the speed with which it descends is equal to the speed with which it rises
Therefore the kinetic energy of the ball before and after the collision is the same
Answer:
CORRECT (SELECTED)
It is elastic since kinetic energy was conserved.
Explanation:
A 50 kg child is sitting on a scale on the floor of an elevator. The elevator starts at rest and accelerates down at a rate of a=−1 m/s2.Calculate the velocity of the elevator after 3 seconds.
Answer:
v=m/s m=v.s -1*3= -3 meter/second
The velocity of the elevator after 3 seconds will be equal to 3 m/s.
What are equations of motion?We have three equations of motion that can be used to calculate components such as displacement(s), initial (u) and final velocity (v), time(t), and acceleration(a). The expressions for the three equations of motion are as follows:
First Equation of Motion :
v = u + at
Second Equation of Motion :
S = ut + (1/2) at²
The third equation of motion is:
v² - u² =2aS
Given, the initial velocity (u) of the elevator is zero as the elevator is at rest initially.
The acceleration of the elevator, a = -1 m/s² moving downward.
The final velocity of the elevator after 3 seconds will be:
v = u + at
v = (0) + (-1 m/s²) (3 s)
v = - 3 m/s
Therefore, the velocity of the elevator after 3 seconds will be equal to 3 m/s in the downward direction.
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