To estimate the distance to a lightning strike, divide the number of seconds between seeing lightning and hearing thunder by five. With a 7-second delay, the storm is approximately 1.4 miles away.
The storm that Johnny and his friends experienced is associated with lightning and thunder. Light from lightning travels much faster than sound from thunder. This difference can be used to estimate the distance to a lightning strike. Since light travels at 3 × 108 meters per second, we see the lightning almost immediately. However, sound travels much slower, and for every 5 seconds we count after seeing lightning before hearing thunder, the storm is approximately 1 mile away.
In Johnny's case, they heard thunder 7 seconds after seeing lightning. Using the rule of thumb that every 5 seconds corresponds to about 1 mile, we can estimate the distance to the storm. 7 seconds divided by 5 gives us 1.4, so the storm is about 1.4 miles away from Johnny and his friends. This is a practical application of basic physics and the differences between light and sound velocity.
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
Which statement is true?Select one of the options below as your answer: A. Gas atoms subjected to electricity emit bright lines. B. Gas atoms absorb white light and emit a continuous spectrum of light. C. Gas atoms under high pressure emit dark lines against a continuous spectrum. D. Gas atoms heated to a high temperature emit white light. E. Gas atoms subjected to electricity do not emit a spectrum,
Identify five main components of the atmosphere
What is the current in a series circuit with a resistance of 30 ohms and a potential difference of 120 volts?
How do elements form?
A) Through fusion in stars and supernova
B)Through the cooling of molten lava
C)Through the evaporation of seawater
D)Through chemical reactions
Answer:
A) Through fusion in stars and supernova
Explanation:
took the test and got it right
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.
Please help me answer these questions ASAP !
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
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:
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
Which statement describes how echolocation and ultrasound imaging are the same?
A.They both use the absorption of sound waves.
B.They both use the diffraction of sound waves.
C.They both use the reflection of sound waves.
D.They both use the transmission of sound waves.
Answer: The correct option is C.
Explanation:
The sound wave is reflected back after striking from the barrier. This is called the reflection of the sound.
When the sound wave incidents on the barrier then it is called incident wave.
When the sound wave gets reflected back from the barrier then it is called reflected wave.
Ultrasound imaging is a medical technique which is used to take the image of the internal parts of organ of the body.
Echolocation is the process which is used by several species. It is used by bats to locate its prey. It is the biological SONAR.
Therefore, echolocation and ultrasound imaging are same as they both use the reflection of sound waves.
You drive in a straight line at 24.0 m/s for 8.0 miles, then at 30.0 m/s for another 8.0 miles. What is the average velocity?
Why does gravity pull things with mass toward it?
"which forms of light are lower in energy and frequency than the light that our eyes can see"
Infrared light, microwave radiation, and radio waves are all forms of light that have lower energy and frequency than what our eyes can perceive. These forms of light are part of the electromagnetic spectrum and have various applications in technology.
Explanation:The forms of light that are lower in energy and frequency than the light that our human eyes can see are infrared light, microwave radiation, and radio waves. These forms of light make up part of the electromagnetic spectrum, which ranges from high-frequency, high-energy gamma rays to low-frequency, low-energy radio waves.
In relation to the visible light we see, these energies are less, and therefore their frequencies are also lower. To illustrate, infrared light is just below red light on the spectrum and is often associated with heat radiation. Microwave radiation is commonly used in technologies such as microwave ovens and wireless communication devices, and radio waves are the longest and hence the lowest energy/frequency waves in the spectrum, utilized in broadcasting signals such as television and radio.
Learn more about Light Energy and Frequency here:https://brainly.com/question/32634466
#SPJ11
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
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
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 .
To learn more abouty the buoyant force refer to the link;
https://brainly.com/question/1967332
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.
An Olympic sprinter can go from a state of rest to 11 meters per second in 10 seconds. What is the average acceleration of the sprinter?
A. 0.9 m/s
B. 110 m/s²
C. 110 m/s
D. 1.1 m/s²
@Vonte12,
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.
Learn more about Vector Addition here:https://brainly.com/question/31940047
#SPJ2
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.
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?
an object which has a mass of 70 kg is sitting on a cliff 10m high calculate the objects potential energy. given g=10m/s^2
A.7,000 Joules
B. 3,500 Joules
C. 700 Joules
D. 70 Joules
E. 35 Joules
Answer: Potential Energy = 7,000 Joules(A)
Explanation:
Potential Energy is the energy possessed by the virtue of its position and it is given as,
P. E = mgh
Where m is the mass= 70kg
g is acceleration due to gravity =10m/s²
h= height = 10m
P. E = 70×10×10
P. E= 7000J
Therefore the potential energy is 7000J
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?
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.
Learn more about Normal Force here:https://brainly.com/question/30436126
#SPJ11
What effect does the removal of vegetation have on soil ?
An atom that has a negative four charge will have which of the following?Answer 4 more protons than electrons An equal amount of protons and electrons 4 more electrons than protons 2 more neutrons than protons,
An atom with a negative four charge will have 4 more electrons than protons.
An atom that has a negative four charge will have 4 more electrons than protons. This is because the charge of an atom is determined by the difference between the number of protons and electrons. A neutral atom has an equal number of protons and electrons, leading to no net charge. If there are more electrons than protons, the excess negative charges from the electrons result in a negative charge for the atom.
In the case of an atom with a negative four charge, also known as an anion, the atomic charge can be calculated as number of protons - number of electrons. Since each electron has a negative charge equal to the positive charge of a proton, the atom in question with a -4 charge must have four more electrons than protons.
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.
you can feel the heat waves from small electric heater on your hands and face even though the heater is on the other side of the room this is an example of
Final answer:
Feeling the heat from a heater at a distance is an example of heat transfer by radiation, where electromagnetic waves emitted by the heater are absorbed by the skin, causing a warming sensation.
Explanation:
Feeling the heat waves from a small electric heater on your hands and face, even though the heater is on the other side of the room, is an example of heat transfer by radiation. This occurs when a hot body like a heater emits electromagnetic waves that travel through the space and are absorbed by your skin, warming you without the need for a medium. This type of heat transfer is the same that occurs when we feel the warmth from the Sun or when an oven warms us as we walk by.