Answer:
The reason is that for the options above, bacteria can only grow most rapidly in the range of temperatures between ~ 40 °F and 140 °F and the reason foods like those have to be refrigerated is because meat can go rot pretty easily and there could have a lot of bacteria and things we do not want at all. But put meat in the fridge can slow down bacterial growth.
Explanation:
Well the answer toy your question is that, counter foods such as:
AvocadosOrangesPistachios( The only things that are on my counter RIGHT now is the shown above.
The reason is that for the options above, bacteria can only grow most rapidly in the range of temperatures between ~ 40 °F and 140 °F
So that is why some foods like fruits can stay out.
The reason why foods like:
MeatVegetablesCioppino ( Type of fish stew )The reason foods like those have to be refrigerated is because meat can go rot pretty easily and there could have a lot of bacteria and things we do not want at all. But put meat in the fridge can slow down bacterial growth.
Thus the answer to your problem is:
The reason foods like those have to be refrigerated is because meat can go rot pretty easily and there could have a lot of bacteria and things we do not want at all. But put meat in the fridge can slow down bacterial growth.
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A wheel that has a radius of 70 cm rotates are 5 radians per Second, what is the velocity of the edge of the wheel in Meters per second
Answer:Radius =70cm
Distance covered in one rotation = circumference of wheel =2πr
=2×
7
22
×70
=440cm
Distance covered in 300 rotation =300×440
=132000=
100000
132000
=1.32km
Given that distance of 1.32km is covered in 5 minutes or
60
5
hour.
Therefore,
Speed of cycle =
time
distance
=
(
60
5
)
1.32
=
5
1.32×60
=15.84km/hr
Explanation:
A 53. 0 kg stunt pilot who has been diving her airplane vertically pulls out of the dive by changing her course to a circle in a vertical plane. What is the apparent weight of the pilot at the lowest point of the pullout?
The apparent weight of the pilot at the lowest point of the pullout 1040 N.
The centripetal force, F = mv²/r, where m is the mass of the pilot, v is her speed, and r is the radius of the circle. At the lowest point of the pullout, the radius of the circle is equal to the distance from the center of the circle to the point where the plane changes direction (i.e., the height above the ground).
Since the plane is diving vertically, the initial speed is, v₀ = √(2gh), where h is the initial height of the plane above the ground, and g is the acceleration due to gravity. At the lowest point of the pullout, all of the potential energy that the plane had at the start of the dive is converted into kinetic energy. Therefore, the speed, v = √(2gh).
Substituting the expressions for v and r into the expression for the centripetal force,
F = m * (2gh) / (2h) = mg
Therefore, the apparent weight of the pilot at the lowest point of the pullout is twice her actual weight,
2 * (53.0 kg * 9.81 m/s²) = 1040 N
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A recycling center has a 0.125 m° box filled with one type of plastic. The full box has a mass of 120 kilograms. What is the density of the plastic? What type of plastic is in the box? JUSTIFY your answer.
The density of the plastic found inside the box would be = 960kg/m³
How to calculate the density of the box?The volume of the box at the recycling center= 0.125m³
The mass of the full box = 120kg
The formula use to calculate the density of the plastic = mass/volume.
That is ; Density = mass /volume = kg/m³
Density = 120/0.125
= 960kg/m³
The type of plastic that is in the box is LDPE (low density polyethylene). This is because the density calculate fell within the range of 940–960 kg/m3.
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Complete question:
A recycling center has a 0.125 m³ box filled with one type of plastic. The full box has a mass of 120 kilograms. What is the density of the plastic? What type of plastic is in the box? JUSTIFY your answer.
When they collide, or combining into clusters
When particles collide, they can either bounce off each other or stick together to form larger clusters.
The outcome of a collision depends on the properties of the particles involved, including their size, shape, and composition, as well as the conditions under which the collision occurs, such as temperature, pressure, and velocity. In elastic collisions, particles bounce off each other without losing any energy or undergoing any permanent deformation. In inelastic collisions, particles stick together to form larger clusters, which can range in size from small molecules to large aggregates. In some cases, collisions can also result in chemical reactions, where the particles involved undergo a chemical transformation to form new compounds. The way in which particles collide and interact with each other is important in many areas of science and engineering, including materials science, chemical reactions, and the behavior of gases and fluids. By understanding the dynamics of particle collisions, scientists and engineers can develop new materials and processes, and gain insights into the fundamental nature of matter and energy.
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What is the frequency of a wave that has a wave speed of 40 m/s and a wavelength of 0.60 m?
Answer: I believe the frequency of a wave is 66.6667 Hz :)
Explanation:
One component of a magnetic field has a magnitude of 0. 0404 T and points along the x axis while the other component has a magnitude of 0. 0739 T and points along the y axis A particle carrying a charge of 2. 80 10 5 C is moving along the z axis at a speed of 4. 46 103 m s a Find the magnitude of the net magnetic force that acts on the particle b Determine the angle that the net force makes with respect to the x axis
a) The magnitude of the net magnetic force that acts on the particle is 2.18 x 10-6 N.
b) The angle that the net force makes with respect to the x axis is 63.8°.
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field.Magnetic Field is the region around a magnetic material or a moving electric charge within which the force of magnetism acts. A pictorial representation of the magnetic field which describes how a magnetic force is distributed within and around a magnetic material.
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b) Two rods: A and B, having same weight and equal length have different thickness.
Rod A is thinner while Rod B is thicker. They are held vertically on the surface of sand. Which one of them will sink more? Why?
Answer:
V ρ = W volume * weight density = weight
Since rod A will produce less resistance to sand it will sink more.
If the diameter of the space station is 770 m, how many revolutions per minute are needed for the "artificial gravity" acceleration to be 9. 80m/s?
To calculate the number of revolutions per minute required to create artificial gravity of 9.80 m/s² in a space station with a diameter of 770 m, we can use the formula for centripetal acceleration: a = (v²)/r
Where a is the centripetal acceleration, v is the velocity of the space station, and r is the radius of the space station. In this case, we want to solve for v, so we can rearrange the formula as: v = sqrt(a * r). Plugging in the given values, we get: v = sqrt(9.80 m/s² * 385 m), v = 62.39 m/s. To convert this to revolutions per minute, we need to know the circumference of the space station, which is: C = 2 * π * r, C = 2 * 3.14 * 385 m, C = 2415.4 m. So the number of revolutions per minute is: rev/min = v / C, rev/min = 62.39 m/s / 2415.4 m/rev * 60 s/min, rev/min = 1.56 rev/min. Therefore, the space station needs to make 1.56 revolutions per minute to create artificial gravity of 9.80 m/s².
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Based on the formula for impulse, what aspect (time, mass, or velocity) will ultimately affect the force of a moving object coming to a complete stop? Why does this work mathematically?
By the usage of momentum change: The formulation to calculate impulse via momentum change is by means of calculating the mass of the physique and the velocity. In this case, Impulse will be equal to the product of mass and velocity. So J= m*v.
How does mass and velocity have an effect on impulse?Momentum, Impulse, and the Impulse-Momentum Theorem
p = m v . p = m v . You can see from the equation that momentum is directly proportional to the object's mass (m) and speed (v). Therefore, the higher an object's mass or the greater its velocity, the greater its momentum.
Is impulse mass times trade in velocity?The object's trade in momentum is equal to the impulse it experiences. The system is F • t = Δ m • v . The product of an object's mass and velocity determine its exchange in momentum.
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A mother with a weight of 60 N is seated on the left side of a see-saw which is 3 m away from the pivot and her son with a weight of 40 N is seated at a distance of 4m on the right. Where should the sister of 10 N be seated to balance the see-saw?
The sister of 10 N should be seated at a distance of 2 m from the pivot to balance the see-saw.
The total weight on the left side is 60 N, and on the right side is 50 N (40 N + 10 N). The two sides must be equal for the see-saw to balance, so 10 N needs to be added to the left side. The sister of 10 N should be placed 2 m away from the pivot on the left side to balance the see-saw.To balance the seesaw it is important that both forces pulling down on each side of the beam are exactly equal. This is only true if the needle is placed exactly in the middle of the candle beam. If one side is slightly longer, this would also make it heavier and it would drop down, as you might have observed.
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An astronomer tells you that he has discovered a new planet that he calls Planet X. All he knows about Planet X so far is that it has a very dense atmosphere with a temperature approximately 5 times warmer than that of Earth. What hypothesis can you reasonably make regarding the atmosphere of Planet X? Planet X cannot contain water in any form. The atmosphere of Planet X must not contain any oxygen, so people couldn't live there. The nitrogen cycle does not operate on Planet X in the same way it does on Earth. The atmosphere of Planet X has a higher concentration of greenhouse gases than Earth's does
Based on the information provided by the astronomer, a reasonable hypothesis regarding the atmosphere of Planet X is that it has a higher concentration of greenhouse gases than Earth's atmosphere.
option D.
What is the astronomer's observation?The astronomer's observation that Planet X has a very dense atmosphere and a temperature approximately 5 times warmer than Earth suggests that there may be a significant greenhouse effect taking place.
Greenhouse gases, such as carbon dioxide, water vapor, and methane, trap heat in a planet's atmosphere, which can lead to warming of the planet's surface.
The fact that the astronomer stated that Planet X cannot contain water in any form and must not contain any oxygen suggests that the atmosphere of Planet X is likely very different from Earth's atmosphere.
The nitrogen cycle, which is an essential part of Earth's ecosystem, may not operate on Planet X in the same way, as stated by the astronomer.
However, these statements do not provide direct evidence regarding the concentration of greenhouse gases in Planet X's atmosphere, so the hypothesis regarding the concentration of greenhouse gases is the most reasonable conclusion based on the available information.
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1) Electrical conductivity (EC) measures the amount of ions in the water; we think of it as the amount of minerals in solution, either calcium, potassium, nitrogen, etc. Over time, has the EC increased or decreased significantly (more than 100 S/cm)? (0.5pt) If so, propose why that may have happened. (0.5pt)
2) Ammonia (NH4) is a waste product of fish. Over time, has NH4 increased or decreased significantly (by 0.25 or greater)? (0.5pt) If so, propose why that may have happened. (0.5pt).
3) Nitrite (NO2-) is a form of nitrogen produced by nitrifying bacteria. Over time, has NO2- increased or decreased significantly (by 5 or greater)? (0.5pt) If so, propose why that may have happened. (0.5pt).
4) Nitrate (NO3-) is a form of nitrogen produced by nitrifying bacteria and is food for plants. Over time, has NO3- increased or decreased significantly (by 10 or greater)? (0.5pt) If so, propose why that may have happened. (0.5pt).
The capacity of water to transmit electrical current is determined by its conductivity. The quantity of electrical ions in the water has a direct impact on this ability
What is called electrical conductivity?A material's electrical resistivity, also known as particular electrical resistance or volume resistivity, determines how effectively it opposes electric current. For example, pure water has a high electrical resistivity and is an insulator. A substance that easily permits electric current has a low resistivity. Greek character is often used to denote resistance (rho). The ohm-meter (m) is the SI measure of electrical impedance.
For instance, if the resistance between the sheet contacts on two opposing sides of a solid material square measuring 1 m3 is 1, the material has a resistivity of 1 m.
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A vehicle is travelling up a ramp that follows the curve y=0. 6x2 where x and y are in [m]. As the vehicle moves through point (Om, O m) where s = 0 m, it has a speed of Vo = 13. 6 [m/s]. The vehicle then increases its speed at a rate i = 0. 078 [m/s2). Determine the vehicle's speed and total acceleration magnitude when the vehicle's position along the path is s = 4. 7105 [m], at which instant i = 2. 5 [m]. V= number (rtol=0. 02, atol=0. 02) a m/s 2 m/s? a = number (rtol=0. 02, atol=0. 02)
The vehicle's speed at s = 4.7105 m is approximately 13.77 m/s (to two significant figures), and the magnitude of its total acceleration is approximately 4.50 m/s^2 (to two significant figures).
A vehicle is moving up a ramp that follows the curve y=0.6x^2. At the start, the vehicle has a speed of 13.6m/s and it increases its speed at a rate of 0.078m/s^2. When it reaches s=4.7105m, the vehicle's speed is 13.77m/s, and the magnitude of its total acceleration is 4.50m/s^2.
These values were calculated using the equations of motion for motion with constant acceleration. The horizontal component of the acceleration is 4.492m/s^2 and the vertical component is 0.078m/s^2.
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2. A golfer wishes to chip a shot into the hole 50 m away on flat level ground. If the ball flies to a
maximum height of 25 m, what speed must it have initially to reach the hole?
The speed the golf which is in projectile motion must have initially to reach the hole is 31.321 m/s.
What is projectile?A projectile is any object which is thrown into the space upon which the only acting force is the gravitational force. The primary force which is acting on a projectile is only gravity. This does not necessarily mean that other forces do not act on the object, just that their effect is minimal compared to the gravity.
A golfer wishes to chip a shot into the hole, which is 50 meters away on the flat level ground. If the ball flies to a maximum height of 25 meters.
The angle with which the ball flies,
tan θ = 25 m/ (50m/2)
tan θ = 1
θ = 45°
If u is the initial speed, the maximum height of the ball will be:
H = u² sin²θ / 2g
By putting the values, we get
25 = u² sin²45 / (2 × 9.81)
u = 31.321 m/s
Thus, the initial speed is 31.321 m/s.
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What is the force of an electric field of strength 4.0 N/C on a charge of 0.5 C?
Please show work this is due today. Giving out brainliest.
The force on a charge of 0.5 C in an electric field of strength 4.0 N/C is 2.0 N.
What is electric field?
Any electrically charged object or collection of objects is surrounded by a physical field known as the electric field. Since it is a vector field, its magnitude and direction are both present. The force per unit charge that a test charge would experience if it were placed at that location in space is known as the electric field.
A stationary charge, such as a charged particle or an electrically charged item, can produce an electric field, as can a changing magnetic field, as in the case of electromagnetic waves. An electric field's strength at a given location is inversely proportional to its distance from the charge and inversely proportional to the quantity of charge present.
The force on a charged particle in an electric field is given by the formula:
F = qE
where F is the force in Newtons, q is the charge in Coulombs, and E is the electric field strength in N/C.
Given the electric field strength E = 4.0 N/C and the charge q = 0.5 C, we can calculate the force as follows:
F = qE
F = (0.5 C) x (4.0 N/C)
F = 2.0 N
Therefore, the force on a charge of 0.5 C in an electric field of strength 4.0 N/C is 2.0 N.
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The horizontal constricted pipe illustrated in the figure (a Venturi tube), can be used to measure flow velocities in an incompressible fluid. The ratio for the cross section areas of A2/A1 =0. 46, the difference in the pressure is Pi - P2 = dP = 27. 6 Pa, and the density of the fluid is 2. 93 kg/m. Find the speed of the fluid near the right hand end of the tube (i. E. , find v2
The speed of the fluid near the right-hand end of the tube is approximately 10.06 m/s.
What is Bernoulli's equation?Bernoulli's equation is a fundamental principle in fluid mechanics that relates the pressure, velocity, and height of a fluid in a flow. It states that for an incompressible fluid flowing in a steady state through a pipe of varying cross-sectional area, the total energy of the fluid (consisting of pressure energy, kinetic energy, and potential energy) remains constant along any streamline of the flow. Mathematically, the equation is:
P + (1/2)ρv² + ρgh = constant
To find the speed of the fluid near the right-hand end of the tube, we can use the Bernoulli's equation, which relates the pressure and velocity of a fluid in a flow:
P₁ + (1/2)ρv₁² = P₂ + (1/2)ρv₂²
where P1 and v1 are the pressure and velocity of the fluid at the left hand end of the tube (where the pipe is wider), and P2 and v2 are the pressure and velocity at the right-hand end (where the pipe is narrower).
We can redo this equation to solve for v₂:
v₂ = sqrt(2*(P₁-P₂)/ρ + v₁²)
where sqrt denotes the square root.
Using the given values:
A₂/A₁ = 0.46
dP = 27.6 Pa
ρ = 2.93 kg/m³
We can find the pressure at the left hand end using the fact that the pressure is the same at the same height, and the fluid is incompressible, so its density is constant:
P₁ = P₂ + dP = P₂ + 27.6 Pa
The area ratio gives us:
A₂ = 0.46*A₁
Now we need to find v₁. We can use the continuity equation, which states that the mass flow rate (ρAv) is constant in an incompressible fluid:
ρ₁A₁v₁ = ρ₂A₂v₂
where ρ1 is the density of the fluid at the left hand end, which is the same as ρ₂, and A₁ and A₂ are the pipe's cross-sectional areas at the left and right ends, respectively.
Substituting A₂ = 0.46 × A₁ and simplifying, we get:
v₁ = (0.46)² × v₂
Substituting this into the Bernoulli's equation, we get:
P₁ + (1/2)ρv₁² = P₂ + (1/2)ρv₂²
Substituting P₁ = P₂ + 27.6 Pa and v₁ = (0.46)² × v₂, and solving for v₂, we get:
v₂ = √((227.6)/(0.46^2ρ) + (0.46)⁴ × v₂²/ρ)
Simplifying this equation, we get:
v₂= √((227.6)/(0.46^2ρ × (1-0.46⁴)))
Substituting the given values, we get:
v₂ = √((227.6)/(0.46²²°⁹³ × (1-0.46⁴))) = 10.06m/s
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A 0.14-kilogram baseball is thrown in a straight line at a velocity of 30 m/sec. What is the momentum of the baseball?
The momentum of the baseball will be "4.20 kg.m/s".
Given values are:
Mass,
m = 0.14 kgVelocity,
v = 30 m/sAs we know the formula,
→ [tex]Momentum=Mass*Velocity[/tex]
or,
→ [tex]P=mv[/tex]
By substituting the given values, we get
→ [tex]=0.14*30[/tex]
→ [tex]=4.20[/tex] [tex]kg.m/s[/tex]
Thus the above answer is correct.
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a red lady appears ___ in blue light
Imagine two equally charged objects that are hanging a certain distance from one another. How does the force between them change if the distance between them triples?
The force is 1/9 as great
The force becomes 9x's greater
The force becomes 3x's greater
The force is 1/3 as great
Answer The force is multiplied times 9
Explanation:
If 400 grams of water is to be heated from 24.0°C to 100.0°C to make a cup of tea, how much heat must be added? The specific heat of water is 4180 J/g∙C
Taking into account the definition of calorimetry, if 400 grams of water is to be heated from 24.0°C to 100.0°C to make a cup of tea, the heat added is 127254.4 J.
Definition of sensible heatWhen heat absorbs or releases from a substance causes a temperature change in it without affecting its physical state (phase change), it is called sensible heat.
The expression that allows to calculate heat exchanges is:
Q = c× m× ΔT
where:
Q is the heat exchanged by a body of mass m.c is the specific heat substance.ΔT is the temperature variation.Heat addedIn this case, you know:
Q= ?c= 4.180 J/g∙Cm= 400 gΔT= Tfinal - Tinitial= 100 C - 24 C= 76 CReplacing in the definition of sensible heat:
Q = 4.180 J/g∙C× 400 g× 76 C
Solving:
Q= 127254.4 J
Finally, the heat added is 127254.4 J.
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What is the resistance of resistor R1?
(1 point)
3.00 Ω
200 Ω
7.50 Ω
5.00 Ω
Answer: The answer is 3.00 Ω
Explanation:you join R1 up with R2.
What light phenomena can be explained using the particle-bullet model of light? check all that apply. What light phenomena can be explained using the particle-bullet model of light?check all that apply. Why shadows and semi-shadows form. Why different media bend light differently. Why the angles of incidence and reflection are the same. Why light travels in a straight line
Answer:
The particle-bullet model of light can explain why shadows and semi-shadows form and why light travels in a straight line. It cannot explain why different media bend light differently or why the angles of incidence and reflection are the same.
If an object with a charge of 0.08 C experiences an electric force of 5.0 what is the electric field strength ?
Please show you work.
The electric field strength is 62.5 N/C.
What is electric field strength ?Electric field strength (E) is a physical quantity that describes the intensity of the electric field at a particular point in space.
The electric field strength (E) can be calculated using the formula:
E = F/q
Where
F is the electric force and q is the charge.Substituting the given values, we get:
E = 5.0 N/0.08 C
E = 62.5 N/C
Therefore, the electric field strength is 62.5 N/C.
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It takes 3 minutes for Ann to run 800 meters without sandbags. If Ann runes 800 meters with sandbags it will take 2 more minutes. What is the speed for running with sandbags?
Ann's speed with sandbags is 400 meters in 5 minutes, or an average of 80 meters per minute.
In everyday use and in kinematics, the speed of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.Speed is defined as. The rate of change of position of an object in any direction. Speed is measured as the ratio of distance to the time in which the distance was covered. Speed is a scalar quantity as it has only direction and no magnitude.There are four types of speed which are uniform speed, variable speed, average speed, and instantaneous speed.
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To help lift a television a mover exerts a force of 50 N on a wedge. The wedge applies a
force 480 N to the televsion. What is the mechanical advantage in using this machine?
O 10
O 0.10
O 24,000
O 1.0
10 is the appropriate number. Here, a machine's mechanical advantage. Hence, choice (a) is the appropriate response. Three mechanical advantages exist: force, distance, and speed.
Although though force mechanical advantage is the sole topic covered in the majority of scientific publications, it is nevertheless crucial.
using the mechanical advantage formula.
[tex]MA= \frac{Fo}{Fi}[/tex]
alternative ≠ 480[tex]N[/tex] and [tex]Fi = 50n,[/tex]
[tex]MA = \frac{480n}{50n}[/tex]
simplify [tex]MA[/tex] ≈ 10
The load to effort ratio is used to quantify mechanical advantage of a machine. A machine's mechanical advantage determines its efficiency. Mechanical Advantage is equal to Load / Effort, or F 0 F I which means that is the mechanical energy, is the production force, and corresponds to the input force.
An object having mass changes its velocity in response to a push or pull. Force is an exterior agent that has the power to alter the rest or motion of something like a body. It has magnitude and direction.
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What is the frequency of a beam of light traveling through a
vacuum with a wavelength of 5 x 104m? The speed of light in a
vacuum is 3.00 × 108 m/s.
the answer I got was 6000Hz
The AMA of the wedge is 4. If How do the force exerted on the wedge as time as the load.
The AMA (mechanical advantage) of a wedge is given by the ratio of the length of the sloping side of the wedge to its width. If the AMA of the wedge is 4, it means that the length of the sloping side of the wedge is four times its width.
What is the AMA of a wedge?The force exerted on the wedge depends on the load being lifted and the angle of the wedge; as the load increases, the force required to lift it also increases. However, the AMA of the wedge allows for the same load to be lifted with less force.
Force = Load / AMA
Hence, if the AMA of the wedge is 4, it means that the length of the sloping side of the wedge is four times its width.
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Car a has a forward speed of 5 m/s and is accelerating at 2. 5 m/s2. Determine the velocity and acceleration of the car relative to observer b, who is riding the ferris wheel and has a constant speed of 3 m/s
Car A has a velocity of 8 m/s and an acceleration of 2.5 m/s2 relative to observer B, who is riding the ferris wheel and has a constant speed of 3 m/s.
Velocity is the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time Velocity defines the direction of the movement of the body or the object. Speed is primarily a scalar quantity. Velocity is essentially a vector quantity. It is the rate of change of distance. It is the rate of change of displacement. It can be calculated by obtaining the ratio of displacement and the total time taken. velocity is expressed in metres/second or m/s. The SI unit of velocity is metre per second (m/s).
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DESPERATE HELP. 80 POINTS. PLEASE PHYSICS
How does changing the charge’s value influence the force between the two charges?
As the value of charge 1 __________, the value of the force ___________.
decreases; decreases
increases; decreases
increases; does not change
decreases; does not change
Answer:
the answer is decreases,decreases
