Answer:b
Explanation:
Thumb rule show the direction of force due to 90 degree angle.
Moon phases are named after the shape the moon resembles during that time. What is is called when the shape of the moon is between a half circle and a full circle.
crescent
semi-full
three-fourths
gibbous
Answer:
waxing gibbous moon so in this case gibbous
Explanation:
what type of electromagnetic waves is released by all objects?
a) Visible light waves
b) Microwaves
c) X-ray waves
d) UV light waves
e) Radio waves
f) Gamma-ray waves
g) Infrared waves
Answer:
a)Visibile light waves
Explanation:
Answer: A, B, G
Explanation:
an airplane is flying west at 200km/h speeds up to 300km/h over 2 hours. what is the acceleration
The acceleration of the airplane increasing its speed from 200 km/h to 300 km/h over 2 hours is 0.00386 m/s².
Explanation:To calculate the acceleration of an airplane which increases its speed from 200 km/h to 300 km/h over a period of 2 hours, you need to use the formula for acceleration, which is the change in velocity Δv divided by the time interval Δt. In this case, the change in velocity is 300 km/h - 200 km/h = 100 km/h.
However, since acceleration is typically expressed in m/s², we should first convert the speeds from km/h to m/s. Doing so, we get approximately 55.56 m/s - 27.78 m/s = 27.78 m/s as the change in velocity.
Given the time interval is 2 hours, it should also be converted to seconds, resulting in 2 hours × 3600 seconds/hour = 7200 seconds.
The acceleration can now be calculated as:
Δv = 27.78 m/s
Δt = 7200 s
Acceleration (a) = Δv / Δt = 27.78 m/s / 7200 s = 0.00386 m/s²
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At a constant pressure, 10 L of a gas at 546 K is cooled to 273 K
What would be the final volume of the gas?
Answer:
5 L
Explanation:
Ideal gas law:
PV = nRT
If P, n, and R are constant, then:
n₁R/P₁ = n₂R/P₂
Using ideal gas law, we can rewrite this as:
V₁/T₁ = V₂/T₂
This is known as Charles' law.
Plugging in values:
10 L / 546 K = V / 273 K
V = 5 L
Answer: 4.51 L
Explanation:
Select the best terms from the drop-down menus that fit the nuclear medicine descriptions.
gamma-ray detection from tracers
assess disease progression, tissue function
a hybrid scan that involves nuclear medicine and X-ray imaging
radiation treatment near or within the tumor from implanted "seeds"
Answer:
Hi there, so gamma-ray detection from tracers: Pet Scan, assess disease progression, tissue function: Nuclear Medicine Scan, a hybrid scan that involves nuclear medicine and x-ray imaging: PET/CT, and lastly radiation treatment near or within the tumor from implanted "seeds": Brachytherapy. Hope this helps <3.
Explanation:
btw you cute <3.
Answer:
Pet Scan
Nuclear Medicine
PET/CT
Brachytherapy
The human body stores chemical energy from digested food. Some of the chemical energy is converted into mechanical energy when the body moves. Which statement is best supported by this information?
Answer:
Digested food is a source of potential energy
Explanation:
A medium is a substance or material in which a wave can travel through. True or False
The answer is:
True
Hope this Helps
Please mark my nswer as brainliest?
Active noise cancelling headphones measure the various sound
waves of the environment around them and produce an inverted wave
of what it "hears". This process partially cancels the noise outside of
the headphones. What is this process called?
Select one:
A)Destructive Interference
B)The Doppler Effect
C)Constructive Interference
D)Resonance
Answer: A) Destructive Interference
Explanation: Wave Interference can be simply defined as a phenomenon that result into creating a higher amplitude, lower amplitude or thesame amplitude of wave as two or more waves superpose.
Destructive Interference is when two waves with opposite or different amplitude but equal frequency cancel the effect of each other out as they superpose.
The active noise cancelling headphones produces an inverted wave to cancel out the noises it picks from it's surrounding, this process is called Destructive Interference.
A student wants to design an investigation to determine if an object has potential energy.
What are some questions she should ask that would help her determine if an object has
potential energy? (Select all that apply)
(2 Points)
Does the object have kinetic energy?
Does the object move when it is released from rest?
Was work done on the object to lift it in the air?
Does a force act on the object?
Is the object part of a system?
Answer:
Explanation: Does the object move when it is released from rest?
Is the object part of a system?
Potential energy can be described as 3 characteristics that a specific object has:
The shape of an object,
The position of an object, and
Its readiness to transform into Kinetic energy.
She should ask the following to help her determine if an object has
potential energy
Does the object move when it is released from rest?
Is the object part of a system?
The student should ask if work was done to lift the object and if a force acts on it, as these help determine the potential energy.
To determine if an object has potential energy, the student should ask the following questions:
Was work done on the object to lift it in the air? - This will help determine if gravitational potential energy is involved.Does a force act on the object? - This questions if there are forces such as gravity or elastic forces that could contribute to potential energy.The questions regarding kinetic energy and movement upon release are less directly related to potential energy, as they address the object's kinetic energy status instead. The consideration of a system may be relevant depending on context, but identifying potential energy primarily focuses on the object's position and forces acting upon it.
A wave with a frequency of 90 Hz is traveling at a speed of 250 m/s
Answer:
The wavelength of wave is 2.78 m.
Explanation:
Frequency of a wave is 90 Hz
Speed of a wave is 250 m/s
It is assume to find the wavelength of wave. The formula of speed is given by :
[tex]v=f\lambda\\\\\lambda=\dfrac{v}{f}\\\\\lambda=\dfrac{250}{90}\\\\\lambda=2.78\ m[/tex]
So, the wavelength of wave is 2.78 m.
A hockey player shoots a puck across the ice with kinetic energy 63) and velocity 28 m/s. What is the mass of the puck?
Answer:160 g
Explanation:Start with the equation [tex]KE = 1/2mv^{2}.[/tex] This becomes [tex]m = 2KE/v^{2}[/tex]. Replace the variables with values and get (2*63)/28^2 = 160 g.
Final answer:
To find the mass of the puck, we use the kinetic energy formula: KE = ½mv². With the given kinetic energy of 63 Joules and velocity of 28 m/s, the calculation reveals that the mass of the puck is 0.1607 kg.
Explanation:
The student has asked a physics question relating to the concept of kinetic energy and its relation to mass and velocity. Kinetic energy (KE) is given by the equation KE = ½mv² where m represents mass and v represents velocity. Given kinetic energy is 63 Joules and velocity is 28 m/s, we will solve for mass (m).
Step 1: Write down the kinetic energy formula: KE = ½mv²
Step 2: Plug in the values: 63 J = ½m(28 m/s)²
Step 3: Simplify and solve for m:
63 J = ½m(784 m²/s²)
63 J = 392m (Joules)
m = 63 J / 392 (J/kg)
m = 0.1607 kg
The mass of the puck is 0.1607 kilograms.
A wave has a wavelength (A) of 2.6 m. The speed (v) of that wave is 35 m/s. What is the frequency (f) of the wave
Answer:
13.46
Explanation:
formula is Wavelength x Frequency
Mercury
What shape is the orbit of Mercury?
Why do you think the Sun is not at the center of Mercury’s orbit?
What did you notice about the motion of Mercury in its orbit?
Earth
What is the orbit of the Earth?
Is the Sun at the center of the Earth’s orbit?
Describe the motion of the Earth throughout its orbit?
Does it move at constant speed?
Mars
What is the orbit of the Mars?
Is the Sun at the center of the Mars’s orbit?
Describe the motion of Mars throughout its orbit?
Does it move at constant speed?
Saturn
What is the orbit of the Saturn?
Is the Sun at the center of the Saturn’s orbit?
Describe the motion of Saturn throughout its orbit?
Does it move at constant speed?
Neptune
What is the orbit of the Neptune?
Is the Sun at the center of the Neptune's orbit?
Describe the motion of Neptune throughout its orbit?
Does it move at constant speed?
Comet
What is the orbit of the comet?
Is the Sun at the center of the comet’s orbit?
Describe the motion of the comet throughout its orbit?
Does it move at constant speed?
Will award brainiest to whoever answers all the questions completely. Will report any dumb or incomplete answers.
Question is worth 50 points!
Answer/Explanation:
Mercury
1) What is the orbit of the Mercury?
The shape of the orbit is oval
2) Is the Sun at the center of the Earth’s orbit?
No
3) Describe the motion of the Earth throughout its orbit?
Starts fast then gets slower then begins to speed up again
4) Does it move at constant speed?
No
Earth
1) What is the orbit of the Earth?
The shape of the orbit is circular
2) Is the Sun at the center of the Earth’s orbit?
Yes
3) Describe the motion of the Earth throughout its orbit?
Travels at a steady consistent speed.
4) Does it move at constant speed?
Yes
Mars
1) What is the orbit of the Mars?
The shape of the orbit is circular
2) Is the Sun at the center of the Earth’s orbit?
Yes
3) Describe the motion of the Earth throughout its orbit?
Travels at a steady consistent speed.
4) Does it move at constant speed?
Yes
Saturn
1) What is the orbit of the Saturn?
The shape of the orbit is circular
2) Is the Sun at the center of the Earth’s orbit?
Yes
3) Describe the motion of the Earth throughout its orbit?
Travels at a steady consistent speed.
4) Does it move at constant speed?
Yes
Neptune
1) What is the orbit of the Neptune?
The shape of the orbit is circular
2) Is the Sun at the center of the Earth’s orbit?
Yes
3) Describe the motion of the Earth throughout its orbit?
Travels at a steady consistent speed.
4) Does it move at constant speed?
Yes
Comet
1) What is the orbit of the Comet?
The shape of the orbit is oval
2) Is the Sun at the center of the Earth’s orbit?
No
3) Describe the motion of the Earth throughout its orbit?
starts slow and gets faster and faster
4) Does it move at constant speed?
No
The orbits of Mercury, Earth, Mars, Saturn, Neptune, and comets around the Sun are elliptical, with the Sun at one of the two foci. Their motion is not at a constant speed but is faster when they are closer to the Sun in accordance with Kepler's laws of planetary motion.
Explanation:The orbits of the planets and comet in our solar system, including Mercury, Earth, Mars, Saturn, Neptune, and comets are all elliptical, not circular. This is according to Kepler's First Law of Planetary Motion. The Sun is not at the center of these orbits but at one of the two foci of the ellipse.
The motion they follow around the Sun, known as orbital motion, is not at a constant speed. This is according to Kepler's Second Law, which states that a line joining a planet and the Sun sweeps out equal areas in equal intervals of time. This means when the planet is closer to the Sun in its orbit, it moves faster. And when it's farther from the Sun, it moves slower.
The same applies to a comet. A comet's orbit can be highly elliptical, and it moves fastest when it is closest to the Sun (the perihelion).
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A rural mail carrier logged the mileage on the odometer at the start of the mail route as 31,500 miles. After 6.5 hours, the carrier returned the truck and recorded the mileage at 31,713 miles. What was the average velocity of the mail truck? Explain your reasoning.
Answer:[tex]32.77\ mi/hr[/tex]
Explanation:
Given
Initially Reading on the odometer is [tex]31,500\ miles[/tex]
Final reading on the odometer is [tex]31,713\ miles[/tex]
Time taken is [tex]t=6.5\ hr[/tex]
average velocity [tex]=\dfrac{\text{Displacement}}{\text{time}}[/tex]
[tex]v_{avg}=\dfrac{31713-31500}{6.5}[/tex]
[tex]v_{avg}=\dfrac{213}{6.5}[/tex]
[tex]v_{avg}=32.77\ mi/hr[/tex]
Thus the average velocity of mail truck is [tex]32.77\ mi/hr[/tex]
Ayan warms some hot chocolate in a microwave oven. Which reasoning explains how the particles that make up the hot chocolate different as the temperature increases?
They move slower.
They have less energy.
They move farther apart.
They are arranged in a pattern.
Answer:
They move farther apart
Explanation:
When objects heat up they expand for example heating up a balloon makes it expand
ASAP pls will mark brainiest
1. False, the relationship between mass and inertia is actually described by Newton's 1st law in which an object will remain still without the tendency to change unless a force is placed upon it.
2. True, Newton did determine a direct relationship between force and mass because the greater the mass, the more force is required.
3. True, any change in velocity is called acceleration, for example, there is deacceleration, zero acceleration, or normal acceleration.
4. True, the greater the force applied to an object, the greater it will accelerate but it also does depend on the mass of an object.
5. False, if the mass of an object is increased, then the given net force will not help it to accelerate.
6. False, a net force of 1N applied to a mass of 1kg does not result in acceleration of 0.5m/s^2 because the net force of a 0.5m/s^2 acceleration is 0.5N.
7. True, the weight of your body does equal mass times gravitational acceleration on earth which is 9.8m/s^2.
8. False, the weight of the 10kg object is heavier than the 5kg object resulting in a slower acceleration.
9. False, the real way to find acceleration is change in velocity over time taken.
10. False, the acceleration of an object depends on the object's weight.
_____ is part of the first line of defense against pathogens.
T cells
Skin
Inflammation
B cells
A wave traveling at a speed of 0.09 meters per second has a frequency of 3Hz. What is its wavelength? (Formula: wavespeed = wavelength x frequency)
0.01m
0.03m
0.09m
0.27m
Answer:
The correct option is (b) i.e. 0.03 m.
Explanation:
We have,
Speed of a wave is 0.09 m/s and the frequency of a wave is 3 Hz.
It is required to find the wavelength of a wave.
The speed of a wave in terms of wavelength and frequency is given by :
[tex]v=f\lambda\\\\\lambda=\dfrac{v}{f}\\\\\lambda=\dfrac{0.09}{3} \\\\\lambda=0.03\ m[/tex]
So, the wavelength of a wave is 0.03 m.
Summarize Newton’s First Law
When it is 32º Farenheit, what is the temperature in degrees Celsius?
a.
-32º C
b.
0º C
c.
10º C
d.
12º C
Answer:
The answer is B.
Explanation:
If 212 degrees Fahrenheit is 100 degrees Celsius, then 32 degrees Fahrenheit is 0 degrees Celsius.
Answer: B
Explanation:
A thermometer is placed in water in order to measure temperature. What would cause the liquid in the thermometer to drop?
Answer:The kinetic energy of the water molecules decreases. ... The motion of the particles in the substance decreases, and the temperature of the substance increases.
Explanation:
Answer:
The molecules in the thermometer’s liquid spread apart.
Explanation:
Which of the following describes a referee's job?
A. Cheering the players on.
O B. Keeping score for the team on offense.
C. Supervising the game to make sure teams are playing fairly.
O D. Settling arguments between players.
Answer:
C. Supervising the game to make sure teams are playing fairly
Answer:
The answer is C
Explanation:
1. What is the intensity of a sound when an observer is 10.0 m from the speaker
that has power of 200. W?
Answer:
About 133 db.
Explanation:
Sound Intensity Level in db (SIL db) is equal to 10log (base 10) times the ratio of the sound intensity at 200 watts (I) relative to the sound intensity of the reference sound intensity (I sub 0), which by default is equal to 10⁻¹² W/m² or 0 dB.
I = 200 w / 10 m^2 = 20 w per square meter
I sub 0 = 10^-12 w per square meter
SIL = 10log ( I / I sub o) = 20 / 10^-12 = 10log ( 20^12) = 10 ( 13.3 ) = 133 db
Hope I typed this part correctly. Hard to get it in without being able to do exponents, etc. :D
How do you calculate the speed of a wave? Write and label the formula.
Answer:
Wavelength x Frequency
Which of the following processes does not require the presence of particles of matter?
A.radiation
B.conduction
C.convection
D.combustion
Radiation is the process that does not require the presence of particles of matter because it has the ability to propagate without the presence of any medium.
What is radiation?Radiation refers to the light energy that comes from a source such as sun. This radiation travels through space at the speed of light that has a wave like properties.
So we can conclude that radiation is the process that does not require the presence of particles of matter because it has the ability to propagate without the presence of any medium.
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Which equation is used to calculate the electric potential in an electric field from a point charge?
O v=ko
Ovako
AV = 40
O AV=AU
Answer: Its B on Edge
Explanation: Trust
Answer please I need help f
Answer:
1.f 2.c 3.d 4.e 5.d 6.a
Explanation:
The third sentence is the inertial law itself. Concentrate in understanding that, and you will understand everything. For example, planets move for billion years because there is no friction in space, which help to understand the second sentence. Mass and inertia is practically the same thing. That's what explain why heavy objects are harder to change its motion. But, if an object has an unbalanced force, the net force is not zero, and if there is no friction, the object will change its motion.
A steel railroad track has a length of 39 m
when the temperature is 8°C.
What is the increase in the length of the
rail on a hot day when the temperature is
37°C? The linear expansion coefficient of
steel is 11 x 10 6 (°C) 1.
Answer in units of in.
Answer:
.
Explanation:
The increase in the length of the 39 m steel railroad track when the temperature rises from 8°C to 37°C is approximately 0.492 inch, calculated using the linear thermal expansion formula ΔL = αLΔT.
The question asks for the increase in the length of a steel railroad track when the temperature rises from 8°C to 37°C. To find the increase in length, we can use the formula for linear thermal expansion: ΔL = αLΔT, where ΔL is the change in length, α is the coefficient of linear expansion, L is the original length, and ΔT is the change in temperature.
Given:
α (coefficient of linear expansion of steel) = 11 x 10-6 °C⁻¹L (original length of steel track) = 39 mΔT (change in temperature) = 37°C - 8°C = 29°CUsing the formula:
ΔL = αLΔT
ΔL = (11 x 10-6 °C⁻¹)(39 m)(29°C)
ΔL = 0.012507 m
To convert ΔL to inches, we use the conversion factor 1 inch = 0.0254 m:
ΔL = 0.012507 m / 0.0254 m/inch
ΔL ≈ 0.492 inch
Therefore, the increase in the length of the steel rail on a hot day when the temperature is 37°C is approximately 0.492 inch.
HELP ASAP PLSS. WILL MARK YOU
Answer:
Force and Motion
Answer:
Acceleration
Explanation:
Any change in speed is change in velocity which is referred to as acceleration.
What produces a person’s voice?
the alveoli
the lungs
the vocal cords
the diaphragm
Answer:
Vocal Cords
Explanation:
Air passes through the vocal cords causing them to vibrate.
Answer:
the vocal cords
Explanation: