Answer:
A) Through fusion in stars and supernova
Explanation:
took the test and got it right
The buoyant force on an object fully submerged in a liquid depends on (select all that apply)
Answer
1. the object’s mass.
2. the object’s volume.
3. the density of the liquid.
4. the mass of the liquid
The buoyant force on an object fully submerged in a liquid depends on the object's volume.and the density of the liquid.
What is buoyant force ?Buoyant force also known as upthrust, is an upward force exerted by a fluid that resists the weight of a partly or completely submerged object.
The weight of the overlying fluid causes pressure to rise with depth in a column of fluid.
The buoyant force on an object fully submerged in a liquid depends on the object's volume.and the density of the liquid.
Hence option 1 and 3 is correct .
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A tow truck exerts a force of 3000 n on a car, accelerating it at 2 meters per second per second. what is the mass of the car?
explain how a diode is like a one way street
If the cross-section of a wire of fixed length is doubled, how does the resistance of that wire change? (this is for studying for my semester exam. I got the question wrong on one of my chapter tests so I'm trying to find out what the correct answer was)
A. Halved
B. Doubled (I know it's NOT this cause that was the wrong one)
C. Unchanged
D. Quadrupled
a bicyclist in the Tour De France crests a mountain pass as he moves at 15km/h. At the bottom 4km/h farther, his speed is 75km/h. What is his average acceleration(m/s^2) while riding down the mountain?,
At which of the following angles will the sunlight received at a location on Earth fall over the smallest area? 80° 65° 40° 10°
Answer: D. 10 degree angle
All places on Earth received sunlight but in different angles. The smallest area, which is the north of the Arctic Circle receive sunlight at a 10 degree angle because of the tilted axis of rotation. Usually, the sun’s rays are the most intense at the equator and the least intense at the poles as Earth revolves around the sun.
Answer:
The angle that will fall over the smallest area is 10
Explanation:
Vector A??? has a magnitude of 2.00 m and vector B??? has a magnitude of 5.00 m. If the direction of each vector is unknown, what is the largest possible value for the magnitude of A??? ???B??? ?
The largest possible magnitude of the two vectors A and B when added is the sum of their individual magnitudes, in this case, 7.00m. This occurs when the vectors are arranged in the same direction.
Explanation:In the field of Physics, particularly when dealing with vectors, the magnitude of the sum of two vectors (like A + B) can be at its biggest when the vectors are aligned in the same direction. In this case, the magnitudes, or lengths, of the vectors simply add up.
Here, you have one vector A, which has a magnitude of 2.00m, and another vector B, which has a magnitude of 5.00m. The largest possible magnitude of these two vectors when added (denoted by A + B) would be 2.00m + 5.00m = 7.00m. This happens when vectors A and B are in the same direction.
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A box of mass 3.0 kg is accelerated from rest across a floor at a rate of 3.0 m/s2 for 4.0 s . what is the net work
What is one property of a wave that determines how much it will diffract when it encounters an obstacle?
-speed
-amplitude
-polarization
-wavelength
Suppose two waves collide, and the temporary combined wave that results is smaller than the original waves. What term best describes this interaction?
-diffraction
-destructive interfernce
-standing wave formation
-constructive interfernce
The formation of a standing wave requires
-the traveling of a wave for a long distance
-constructive interference between two waves of slightly different frequencies
-that refraction and diffraction occur at the same time in a wave
-interference between incoming and reflected waves
Power can be expressed
1. in joules per watt, or in newtons per second
2. in joules per second, or in watts
3. in joules, or in newton-meters
Power in physics is the rate at which energy is transferred, correctly measured in joules per second or watts. Option 2
Power in physics is defined as the rate at which work is done or the rate at which energy is transferred. This rate is typically measured in joules per second (J/s), which is also known as a watt (W). To clarify the options provided in the question, power cannot be correctly expressed in joules per watt or newtons per second as these do not represent the rate of energy transfer.
Instead, power is correctly expressed in joules per second, which is equivalent to watts. For instance, a device like a light bulb that uses electrical energy to produce light and heat will have its power consumption rated in watts. The higher the wattage, the more power it consumes over a given period of time.
Additionally, power is sometimes measured in units such as the horsepower (hp), where 1 hp equals 746 watts. Furthermore, it is important to realize that terms like kilowatt-hour (kWh) are units of energy, not power. For instance, a 2000-watt iron would use 2 kWh of energy over one hour, which is equal to 2 x 3.6 million joules. Option 2
An ammeter can measure current upto 500mA. There are 20 equal division between 0 and 100mA mark on its scale. During an experiment to determine the equivalent resistance of the two resisters joined in parallel a student observes ammeter’s pointer at 3rd graduation mark after zero when the key is off and the pointer at the 17th graduation mark after 200mA when the key is inserted into the plug.The correct value of the current flowing in the circuit is
Ohm’s law is I = V ÷ R. What is the current of a circuit with a 3.0-volt battery and 1.0 ohm of resistance? The current of a circuit with a 3.0-volt battery and 1.0 ohm of resistance is (blank) amps.
Final answer:
Using Ohm's Law, which states I = V / R, the current of a circuit with a 3.0-volt battery and 1.0 ohm of resistance is calculated to be 3.0 amperes.
Explanation:
Calculating Current with Ohm's Law
Ohm's Law describes the relationship between current (I), voltage (V), and resistance (R) in an electrical circuit, stating that I = V / R. To calculate the current in a circuit with a 3.0-volt battery and 1.0 ohm of resistance, you would use the formula I = V / R. Plugging the values into the formula gives us I = 3.0 V / 1.0 Ω, which simplifies to I = 3.0 A. Therefore, the current of the circuit would be 3.0 amperes.
The atomic model that describes an atom as a spherical object containing a certain number of electrons trapped in a mass of positive charge is often called ____ model.
This atomic model was developed in 1904 by the British scientist J.J. Thomson, from his discovery of the existence of the electron in 1897.
Taking into consideration that at that time there was still no evidence of the atom nucleus, Thomson thought the electrons (with negative charge) were immersed in a substance (the atom) of positive charge that counteracted the negative charge of the electrons. Just like the raisins embedded in a pudding or bread.
That is why this model was called the raisin pudding atomic model
Two charged parallel plates are 0.25 meters away from each other. The field between the plates is 600 . What is the electric potential difference?
Answer:
150
Explanation:
edg 2022, electric potential difference assignment (slide 4/9)
Identify five main components of the atmosphere
2. What happens when multiple forces act on an object? (Points : 1)
A. The object will always move.
B. The object will move if the forces are balanced.
C. The object will move if the forces are unbalanced.
D. The object will always stay in place.
3. An object moves in the direction of the __________ force. (Points : 1)
A. net
B. balanced
C. strongest
D. weakest
PLEASE HELP ME
In a vasectomy, which part of the anatomy is cut or tied off?
A. testes
B. vas deferens
C. urethra
D. seminal vesicles
Answer: Vas deference
Explanation: This is a method of contraception in uses a small surgical procedure. This method is a permanent method of contraception.
During this procedure, male vas deference are cut and tied together or we can say it is sealed to prevent the path of sperm from getting into the urethra and in this way it prevents fertilization of a females egg during the sexual intercourse.
What is the current in a series circuit with a resistance of 30 ohms and a potential difference of 120 volts?
Two vectors A and B have precisely equal magnitudes. In order for the magnitude of A+ B to be 110 times larger than the magnitude of A-B , what must be the angle between them?,
Due to the magnitudes, as mentioned in the problem, being equal, B has components Acos(θ)x along the x-axis and Asin(θ) along the y-axis.
The solution is as follows:
A+B has:
total x-component = A + Acos(θ) = A(1+cos(θ))
total y-component = 0 + Asin(θ) = Asin(θ)
Resultant = √[( A(1+cos(θ)))² + (Asin(θ))²]
= A√[1 + 2cos(θ) + cos²(θ) + sin²(θ)]
=A√[2 + 2cos(θ)]
A-B has:
total x-component = A - Acos(θ) = A(1-cos(θ))
total y-component = 0 - Asin(θ) = -Asin(θ)
Resultant = √[( A(1-cos(θ)))² + (-Asin(θ))²]
= A√[1 - 2cos(θ) + cos²(θ) + sin²(θ)]
=A√[2 - 2cos(θ)]
A+B/A-B = [A√[2 + 2cos(θ)]] / A√[2 - 2cos(θ)]
= [√[2 + 2cos(θ)]] / [√[2 - 2cos(θ)]]
110 = [√[1 + cos(θ)]] / [√[1 - cos(θ)]]
12100 = [1 + cos(θ)] / [1 - cos(θ)]
12100 - 12100cos(θ) = 1 + cos(θ)
12101cos(θ)] = 12099
cos(θ)= 0.999834724
θ = 1.04º
Why does gravity pull things with mass toward it?
Electric fields exist at a distance from two [blank] spheres.
a) magnetic
b) neutral
c)charged
Answer:
c)charged
Explanation:
A mixing blade on a food processor extends out 3 inches from its center. if the blade is turning at 600 revolutions per minute, what is the linear velocity of the tip of the blade in feet per minute? (round your answer to the nearest whole number.)
Answer:
The linear velocity of the tip of the blade is 940.94 ft/min.
Explanation:
It is given that,
A mixing blade on a food processor extends out 3 inches from its center, r = 3 inches = 0.0762 meters
Angular speed of the blade, [tex]\omega=600\ rev/minute=62.83\ rad/s[/tex]
Let v is the linear velocity of the tip of the blade. The relation between the angular velocity and the linear velocity is given by :
[tex]v=r\times \omega[/tex]
[tex]v=0.0762\times 62.83[/tex]
v = 4.78 m/s
or
Since, 1 m/s = 196.85 ft/min
4.78 m/s = 940.94 ft/min
So, the linear velocity of the tip of the blade is 940.94 ft/min. Hence, this is the required solution.
A person weighing 0.70 kn rides in an elevator that has an upward acceleration of 1.5 m/s2. what is the magnitude of the normal force of the elevator's floor on the person?
The magnitude of the normal force of the elevator's floor on the person, given the person weighing 0.70 KN and the elevator accelerating upward at 1.5 m/s², is approximately 800 N.
Explanation:This problem falls under the domain of Physics, specifically involving Newton's laws and the concept of the normal force within the context of elevator motion. To address the scenario of a person weighing 0.70 KN riding in an elevator that is accelerating upward at 1.5 m/s2, we need to understand the person's experienced force, otherwise known as normal force.
The normal force can be calculated using Newton's Second Law, F=ma, and knowing that the normal force equals the weight plus the product of the mass and acceleration when the elevator is moving upwards. In this case, the person's weight on Earth is equal to the force of gravity on them; with gravity being roughly 9.8 m/s2, the person's mass (m) would be their weight (w) divided by gravity (g), giving m = 0.70 KN / 9.8 m/s2 ≈ 71.4 kg.
The normal force (Fn) on upwards acceleration is given by Fn = m*(g+a), where a is the acceleration of the elevator. Substituting the given figures for m, g, and a we find Fn = 71.4 kg * (9.8 m/s2 + 1.5 m/s2) =~ 800 N (rounded to the nearest integer). Therefore, the magnitude of the normal force of the elevator's floor on the person is about 800 N.
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Immediately above the Sun's photosphere is the _______, which is the Sun's lower atmosphere
Immediately above the Sun's photosphere is the _______, which is the Sun's lower atmosphere.
A.
chromosphere
B.
solar wind
C.
corona
D.
core
The chromosphere is a thin layer of the atmosphere of the sun (or any other star) above the photosphere and below the corona. It consists mainly of hydrogen and helium.
This layer is very faint and reddish when it becomes visible, for a few seconds, at the beginning and end of a Solar eclipse and its appearance is not homogeneous.
Answer:
chromosphere
Explanation:
I got it right on study island
What is the transfer of energy to an object using a force that causes the object to move in the direction of the force?
a. movement
b. power
c. work
d. force?
The weight of a synthetic ball varies directly with the cube of its radius. a ball with a radius of 2 inches weighs 5.605.60 pounds. find the weight of a ball of the same material with a 3-inch radius.
For precipitation to form, cloud droplets must grow in volume by roughly __________ times.
The correct answer is by roughly one million times.
Any product of the condensation of atmospheric water vapor, which falls under gravity is known as precipitation. The main forms of precipitation are rain, drizzle, snow, sleet, and others.
All the precipitation give rise to clouds and the clouds are produced when water vapor in the atmosphere condenses and cools. With the condensation of water vapor, the formation of water droplets takes place, and if the formation of clouds takes place within or is moved into the part of the atmosphere, which is below freezing then the droplets turn into ice crystals.
In order to form precipitation, the cloud droplets must grow in volume by roughly one million times.
Which consumes more energy, a 1.3 kw hair dryer used for 10 min or a 10 w night light left on for 24 hr?
The 1.3 kW hair dryer consumes less energy than the 10 W night light. Calculations show that the hair dryer uses 0.2167 kWh, while the night light uses 0.24 kWh.
The 1.3 kW hair dryer used for 10 minutes consumes more energy compared to the 10 W night light left on for 24 hours. To calculate energy consumption, we use the formula: Energy = Power x Time. For the hair dryer: Energy = 1.3 kW x (10 min / 60 min) = 0.2167 kWh. For the night light: Energy = 10 W x 24 hours = 0.24 kWh. Therefore, the hair dryer consumes less energy.
The ease with which a memory can be retrieved is influenced by all of the following EXCEPT
How well the person encodes the information
The importance of the information
The person's belief in the information
How well the person stores the information,
Work can _____ energy between objects and can cause a change in the form of energy.
A. Transfer
B. Change
C. Increase
D. Decrease
Answer:
Work can transfer energy between objects and can cause a change in the form of energy.
Explanation:
The best explanation can be done with an example.Consider an apple of mass m falling from a tree. Initially, the apple is at rest on the tree, at a certain height h above the ground, so it has a form of energy called gravitational potential energy, equal to: where g is the acceleration due to gravity.As the apple falls, the force of gravity acts on it, and so this force does work on the apple. As a result, the potential energy of the apple is converted into another form of energy, kinetic energy, which is the energy due to the motion of the apple: where v is the speed of the apple.Consider another example: a man pushing a box along the floor with a force F. The man is doing work on the box, and this work is equal towhere d is the displacement of the box. As a result of this work, some of the chemical energy contained in the muscles of the man is transferred into the box and converted to kinetic energy of the box, which is put in motion and it gains a certain speed v. In particular, if there are no frictional forces involved, the work done by the man is equal to the kinetic energy gained by the box.