Answers
Answer:
Gamma Rays
Explanation:
Because it has the most energetic radiation and could penetrate through six feet of concrete. It is so strong it can damage your dna.
Related Questions
Find the vector components along the directions noted in the parentheses.
a. a duck accelerating away from a hunter at 2.5 m/s2 at an angle of 45° to the ground (horizontal and vertical).
b. a car displaced 50° north of east by 12.0 km (north and east).
Answers
a. Horizontal: 1.77 m/s; Vertical: 1.77 m/s
b. North: 10.4 km; East: 10.4 km
How to find the vector components along with directions?To find the vector components along the directions noted in the parentheses for a, we can use the Pythagorean theorem and basic trigonometry. The hypotenuse of the triangle formed by the vector is 2.5 m/s2, and the angle is 45°. We can use the Pythagorean theorem to solve for the horizontal component, which is 1.77 m/s. We can then use basic trigonometry to solve for the vertical component, which is also 1.77 m/s.
To find the vector components along the directions noted in the parentheses for b, we can use basic trigonometry. Since the displacement is 12.0 km and the angle is 50°, we can use basic trigonometry to solve for the north component, which is 10.4 km. We can then use basic trigonometry to solve for the east component, which is also 10.4 km.
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100 joules of work are done on an object when a force of 10n pushes it. how far is the object pushes it? what power is used if this is done in 4 seconds?
I need the distance and the work done (with explanation please)
Answers
Work = Force x Distance x cos(theta)
where force is the applied force, distance is the distance over which the force is applied, and theta is the angle between the direction of the force and the direction of motion. Since the force and the direction of motion are in the same direction, the angle between them is 0 degrees, and cos(0) = 1, so the formula becomes:
Work = Force x Distance
Given that 100 joules of work are done on an object when a force of 10 N pushes it, we can use the formula to find the distance over which the force is applied:
100 J = 10 N x Distance
Distance = 100 J / (10 N) = 10 meters
Therefore, the object is pushed over a distance of 10 meters.
The power used to do this work can be calculated using the formula:
Power = Work / Time
where work is the amount of work done (in joules) and time is the time taken to do the work (in seconds).
Given that the work done is 100 joules and this is done in 4 seconds, we can calculate the power used as:
Power = 100 J / 4 s = 25 watts
Therefore, the power used to do this work is 25 watts.
A turbo molecular pump has rapidly rotating blades which hit the molecules of gas in the coating chamber. This collision transfers some momentum to the particles. This process of momentum transfer is more efficient if the average linear velocity of a molecule is less than the linear velocity of the blade tip. Assuming that a particular pump has a linear blade tip velocity of 400 m/s, (a) calculate the ratio of the average room temperature (say, 27 0 C) molecular velocity to blade tip velocity for the gases such as hydrogen, nitrogen and xenon having molar masses of 2, 28 and 131 g/mol, respectively. (b) Is the turbo molecular pump better for pumping heavy element or light element?
Answers
Answer:
heavy molecules are pumped much more efficiently than light molecules. Most gases are heavy enough to be well pumped but it is difficult to pump hydrogen and helium efficiently.
12.
A hiker walks for 5km on a bearing of 053" true (North 53° East). She then turns and
walks for another 3km on a bearing of 107° true (East 17° South).
(a)
Find the distance that the hiker travels North/South and the distance that she travels
East/West on the first part of her hike.
Answers
The hiker travelled 4.02 km North/South and 4.74 km East/West during her hike.
This question involves vector addition, the resolution of vectors, the use of bearings, and trigonometry in the calculation of the hiker's movement.
This may appear to be a difficult problem, but with some visual aid and the proper use of mathematical formulas, the issue can be addressed correctly.
Resolution of VectorThe resolution of a vector is the process of dividing it into two or more components.
The angle between the resultant and the given vector is equal to the inverse tangent of the two rectangular components.
Angles will always be expressed in degrees in the solution.
The sine, cosine, and tangent functions in trigonometry are denoted by sin, cos, and tan.
The tangent function can be calculated using the sine and cosine functions as tan x = sin x/cos x. Also, in right-angled triangles, Pythagoras’ theorem is used to find the hypotenuse or one of the legs.
Distance Travelled North/SouthThe hiker traveled North for the first part of the hike and South for the second.
The angles that the hiker traveled in the first part and second parts are 53 degrees and 17 degrees, respectively.
The angle between the two is (180 - 53 - 17) = 110 degrees.
The angle between the resultant and the Northern direction is 110 - 53 = 57 degrees.
Using sine and cosine, we can calculate the north/south distance traveled to be 5 sin 57 = 4.02 km, and the east/west distance to be 5 cos 57 = 2.93 km.
Distance Travelled East/WestThe hiker walked East for the second part of the hike.
To calculate the distance travelled East/West, we must first calculate the component of the first part that was East/West.
The angle between the vector and the Eastern direction is 90 - 53 = 37 degrees.
Using sine and cosine, we can calculate that the distance travelled East/West for the first part of the hike is 5 cos 37 = 3.88 km.
To determine the net distance travelled East/West, we must combine this component with the distance travelled East/West in the second part of the hike.
The angle between the second vector and the Eastern direction is 17 degrees.
Using sine and cosine, we can calculate the distance traveled East/West to be 3 sin 17 = 0.86 km.
The net distance traveled East/West is 3.88 + 0.86 = 4.74 km.
Therefore, the hiker travelled 4.02 km North/South and 4.74 km East/West during her hike.
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Blocks 1 and 2 are connected by a light string that passes over a pulley with negligible mass and friction, as shown in the figure. Block 1 is on a table covered with two different materials, A and B. The two-block system is released from rest, and the speed of block 1 begins to increase. When block 1 reaches material B, its speed increases at a greater rate. Which of the following correctly compares the coefficient of kinetic friction m between block 1 and the two materials and describes the change in the magnitude of the net force on block 2 as block 1 slides from material A to material B?
Answers
The coefficient of kinetic friction on material B is greater than material A, causing an increase in net force on block 2.
The coefficient of kinetic friction between block 1 and material B is greater than that between block 1 and material A, which causes an increase in the net force acting on block 2 as block 1 slides from material A to material B.
This is because the increased friction on material B results in a greater opposing force to the motion of block 1, which in turn causes a greater tension force on the string and therefore a greater net force on block 2.
This effect is due to the properties of the different materials and the interaction between the materials and the block, which ultimately determine the amount of friction present and the resulting force acting on the system.
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In the following problems, assume the following parameters:
Mass of the bottom steel disc: 1.468 kg.
Mass of the upper steel disc: 1.479 kg.
Mass of the upper aluminum disc: 0.461 kg.
Radius of each disc: 63.3 mm.
Radius of the take-up spool: r= 1.25 cm.
Mass of the falling weight: 25 grams.1.
1. Using the values given above, calculate the following:
a. The moment of inertia of the lower, steel disc.
b. The moment of inertia of the upper, steel disc.
c. The moment of inertia of the upper, aluminum disc.
d. The combined moment of inertia of the two steel discs.
2. Using the results of problem 1, what percentage error is made by neglecting mr2with respect to Iin equation (95)?
3. Suppose that the counter is reading 400 counts per second at some moment. What is the value of Ïat that moment?
Answers
Answer:
1) a) I₁ = 0.2941 kg m², b) I₂ = 0.2963 kg m², c) I_{total} = 0.5904 kg m²
3) α = 6.31 10⁶ rad / s²
Explanation:
1) The moment of inertia for bodies with high symmetry is tabulated, for a divo with an axis passing through its center is
I = ½ m r²
a) moment of inertia of the upper disk
I₁ = ½ m₁ r₁²
I₁ = ½ 1,468 0.633²
I₁ = 0.2941 kg m²
b) upper aluminum disc moment of inertia
I₂ = ½ m₂ r₂²
I₂ = ½ 1.479 0.633²
I₂ = 0.2963 kg m²
c) the moment of inertia is an additive scalar quantity therefore
I_{total} = I₁ + I₂
I_{total} = 0.2941 + 0.2963
I_{total} = 0.5904 kg m²
3) ask the value of the angular acceleration, that is, the second derivative of the angle with respect to time squared
indicate the angular velocity of the system w = 400 rev / s
Let's reduce the SI system
w = 400 rev / s (2π rad / rev) = 2513.27 rad / s
as the system is rotating we can calculate the centripetal acceleration
a = w² R
a = 2513.27² 0.633
a = 3.998 10⁶ m / s²
the linear and angular variable are related
a = α r
α = a / r
α = 3.998 10⁶ / 0.633
α = 6.31 10⁶ rad / s²
What is the moment of inertia of a 4.2-kg uniform cylindrical grinding wheel of radius 32 cm?
Answers
The moment of inertia of the uniform cylindrical grinding wheel is 2,150 kgm².
What is the moment of inertia?
This refers to the angular mass or rotational inertia can be defined with respect to the rotation axis, as a property that shows the amount of torque needed for a desired angular acceleration or a property of a body due to which it resists angular acceleration. The unit is kgm².
From the question:
Mass,M =4.2kg
Radius, R=32Cm
The formula for calculating the moment of inertia for uniform cylindrical grinding wheel:
moment of inertia, I =1/2MR²
I =\(\frac{1}{2}\) * 4.2 * 32²
=2,150.4 kgm²
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The Sun is a type G2 star. Type G stars (from G0 to G9) have a range of temperatures from 5200 to 5900. What is the range of log(T) for G stars
Answers
Answer:
Explanation:
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Please can you explain what this paragraph is trying to say. Also what does it mean in the sentence 'the difference in charge across the battery provides push for current' and what is the difference in charge.
Here's paragraph I need to have a simple definition of:
A high waterfall is also like a large voltage. It will transfer a lot of energy to the water (charge), making the river flow very fast (a large current) the difference in height makes the river flow. In a circuit , the difference in charge across battery provides push for the current.
Answers
It is saying that a high waterfall has a lot of potential energy that can transfer to the water and cause it to flow very fast, which is similar to how a large voltage in an electric circuit can create a large current. The difference in height of the waterfall causes the water to flow, just as the difference in charge across a battery provides the push or force for the current to flow in a circuit.
In an electric circuit, voltage is the measure of the electric potential difference between two points, and it is measured in volts. Current is the flow of electric charge through the circuit, and it is measured in amperes or amps. The difference in charge across the battery refers to the potential difference or voltage between the positive and negative terminals of the battery, which creates an electric field and provides the force or push for the current to flow through the circuit.
What is the frequency of a wave if its wavelength is 5 m and its speed is 20 m/s?.
Answers
Answer:
v=fy
Explanation:
v=fy
v= speed of light
f=frequency
y=wave lenght
make f subject of formula in this case
v=fy
f=v/y
f=20/5
f=4Hz
How long did it take me to make this?
Answers
Answer:
Its according from what it is made with if wax it takes longer but if with a craft paper it takes lesser time if paper approximately 20 to 25 minutes
To measure the capacitance C of a capacitor, you attach the capacitor to a battery and wait until it is fully charged. You then disconnect the capacitor from the battery and let it discharge through a resistor of resistance R. You measure the time T1/2 that it takes the voltage across the resistor to decrease to half its initial value at the instant that the connection to the capacitor is first completed. You repeat this for several different resistors. You plot the data as T1/2 versus R and find that they lie close to a straight line that has slope 7.50 μF.
What is the capacitance C of the capacitor?
Answers
The RC circuit, which is utilized in this experiment, is one of the most basic circuits that make use of a capacitor. When two conductors are linked to a charging device, the charge is passed from one conductor to the other.
When two conductors are connected to a charging device (such as a battery), the charge is transferred from one conductor to the other until the potential difference between the terminals of the charging device and the potential difference between the conductors are equal.
Capacitors are objects that have the capacity to hold electrical charge and energy. Capacitors have a wide range of uses, such as filters in DC power supplies and energy banks for pulsed lasers. Since capacitors only pass AC current and not DC current, they are used to block the DC component of a signal so that the AC component of the signal may be detected.
Plasma physics makes use of the energy-storage capabilities of capacitors. In plasma physics, short energy bursts with extremely high voltages and currents are frequently needed. A capacitor can be softly charged to the necessary voltage and then quickly discharged to yield the necessary energy.
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WILL DO BRAINLIEST A jar contains seven pink, 6 orange, and four blue marbles. If you pick one without looking, what is the probability that the marble you pick will be orange?
6/10
6/17
11/17
7/11
Answers
Answer:
Choice 2: 6/17
Explanation:
4+7=11. 6+11= 17. so it's 6/17
21. If € = 8.0 V, at what rate is the emf providing energy to the circuit shown?
15 2
10 22
12 V
+
1022.
a. 8.4 W
b. 7.6 W
C.5.6 W
d. 11 W
e. 2.0 W
Answers
Answer:
c. 5.6 W
Explanation:
We can write the Kirchoff's voltage law (KVL) equations for the circuit using i1 for the clockwise current in the left loop, and i2 for the clockwise current in the right loop. Then the circuit equations are ...
i1 (10 +10) -i2(10) = 12
-i1(10) +i2(10 +15) = 8
Using Cramer's rule to find i2, we have ...
i2 = (12(-10) -8(20))/((-10)(-10) -(25)(20)) = -280/-400 = 0.7
The power supplied by the Emf is ...
(8 V)(0.7 A) = 5.6 W . . . . . matches choice C
Using atleast 4 sentences. Please share three facts you have learned this year in Physical Education and how you will adapt what you have learned to your everyday life.
Answers
Three facts I have learned this year in Physical Education are:
a) The importance of stretching before and after exercising.
b) The benefits of cardiovascular exercise.
c) The importance of staying hydrated during exercise.
Firstly, I have learned the importance of stretching before and after exercising. Stretching helps prevent injury and improves flexibility. I will make sure to incorporate stretching into my daily routine, whether it's through a short stretching session in the morning or by taking a few minutes to stretch before and after a workout.
Secondly, I have learned the benefits of cardiovascular exercise. Cardiovascular exercise, such as running or cycling, helps improve heart health and endurance. I will try to incorporate more cardiovascular exercise into my daily routine, such as going for a run or bike ride after work.
Lastly, I have learned the importance of staying hydrated during exercise. Dehydration can lead to fatigue and muscle cramps, so it's important to drink plenty of water before, during, and after exercise. I will make sure to carry a water bottle with me throughout the day and refill it regularly to ensure that I am staying hydrated.
In summary, by incorporating stretching, cardiovascular exercise, and staying hydrated into my daily routine, I hope to improve my overall physical health and well-being.
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A light spring having a force constant of 115 N/m is used to pull a 9.00 kg sled on a horizontal frictionless ice rink. The sled has an acceleration of 2.10 m/s2. Part A By how much does the spring stretch if it pulls on the sled horizontally
Answers
Answer:
Stretch in the spring = 0.1643 (Approx)
Explanation:
Given:
Mass of the sled (m) = 9 kg
Acceleration of the sled (a) = 2.10 m/s ²
Spring constant (k) = 115 N/m
Computation:
Tension force in the spring (T) = ma
Tension force in the spring (T) = 9 × 2.10
Tension force in the spring (T) = 18.9 N
Tension force in the spring = Spring constant (k) × Stretch in the spring
18.9 N = 115 N × Stretch in the spring
Stretch in the spring = 18.9 / 115
Stretch in the spring = 0.1643 (Approx)
Why is gravitational force always towards the center?
Answers
Answer:
i beleave cuz of the Earth is spherical
Explanation:
Hypersonic scramjet. On March 27, 2004, the United States
successfully tested the hypersonic X-43A scramjet, which flew at
Mach 7 (seven times the speed of sound) for 11 seconds. (b) How many kilometers
did the scramjet travel during its 11 second test?
Answers
25.487 km did the scramjet travel during its 11 second test.
Given that the scramjet travels at a speed seven times that of sound, speed v is equal to 7 x 331 m/s or 2317 m/s.
(A) We require the scramjet's travel time over a distance of
d = 5000 km (5x10^6 m).
Using the formula
time taken = distance traveled/speed,
we can calculate the following:
(5x10^6)/2317 sec
= (5x10^6)/(23175x60) minute
= 5000000/139020 minutes
= 35.97 seconds
As 1 second equals 1/60 of a minute, Therefore, the travel time on Scramjet from San Francisco to New York will be 35.97 minutes.
(B) The distance covered by the Scramjet in 11 seconds must now be determined. as a result,
using speed, distance, and time relation.
Distance = Speed x Time
= 7 x 331 x 11
= 25487 m
Since 1 metre equals 1/1000 of a kilometer, 25487 m of 25.487 km
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why is interpretation an important part of meteorology
Answers
Strong interpretation is an important thing in meteorology. Because, analyzing the climate level in each area and the factors affecting it with their visual representation is very important in weather forecast.
What is meteorology ?Meteorology is a branch of science dealing with the weather in different regions. On interpreting data, forecasters are tasked with synthesizing available observations from multiple platforms (including surface observations, weather balloons, radar, and satellite), numerical guidance from computer model forecasts, scientific theory, and experience-based intuition to arrive at a forecast.
The forecast process is often collaborative, with teams of meteorologists routinely integrating new information into the forecast as the event approaches.
Increasingly, forecasters are also responsible for effectively communicating the forecast and its anticipated impacts upon life and property to various stakeholders, including the public.
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A car turns a certain curve of radius 24.98 m with constant linear speed of
15.67 m/s. If the centripetal force experienced by that car is 34.652 kN, what is the
mass of the car?
Answers
Answer:
3525.19 kg
Explanation:
The computation of the mass of the car is shown below:
As we know that
Fc = m × V^2 ÷ R
m = Fc × R ÷ V^2
Provided that:
Fc = 34.652 kN = 34652 N
R = Radius = 24.98 m
V = speed = 15.67 m/s
So,
m = 34652 × 24.98 ÷ 15.67^2
= 3525.19 kg
Which of the following use electromagnetic energy.
(Select all that apply)
Answers
Answer:
B. medical imaging, C. communication technology, and D. air conditioner.
Were is the computer located
Answers
Answer:
where u put it last time or retrace ur steps to where u last put it
A spherical bowling ball of mass 7 kg and radius 0.18 m rolls down a hill that has a vertical height of 7 m. If the ball started from rest at the top, what is its angular momentum at the bottom of the hill? Use two sig figs.
Answers
Answer:
er so ue 0.984 kg study your self brhh
What is energy anything that takes up space and has mass a change in the position of an object a push or pull the ability to cause change in matter
Answers
Energy is that which has the ability to cause change in matter.
What is energy?Energy is the quantitative property that is transferred to a body or to a physical system, recognizable in the performance of work and in the form of heat and light. Energy is a conserved quantity—the law of conservation of energy states that energy can be converted in form, but not created or destroyed.
So in simple definition we can say that energy is that which has the ability to cause change in matter.
Based on the given statements we can classify them as;
anything that takes up space and has mass - matter.cause a change in the position of an object through push or pull - forcethe ability to cause change in matter - energy.Learn more about energy here: https://brainly.com/question/13881533
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A block of cheese is pulled on by a string and remains at rest.
What is the correct free body diagram for the block of cheese?
Choose 1 answer:
Answers
Answer:
Explanation:
- The friction acts leftwards to balance the tension that must be pulling up and to the right.
- The force of gravity is straight down.
- The normal force is perpendicular to the contact surface.
The force of gravity is straight down.
What is force of gravity?
On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them.
Gravity is measured by the acceleration that it gives to freely falling objects.
According to the question,
A block of cheese is pulled on by a string and remains at rest until we will not apply an external force.
It also posses force of gravity.
The friction acts leftwards to balance the tension that must be pulling up and to the right.
The force of gravity is straight down.
The normal force is perpendicular to the contact surface.
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A student moves a horseshoe magnet by hand across a tabletop to varying distances from an electromagnet, as shown in the diagram above.
The student records observations of how much force it takes to hold the horseshoe magnet in place at each distance. Observations
• 20 cm: no force required
• 10 cm: small force required; easy to hold in place
• 5 cm: large force required; very difficult to hold in place
What do the student's observations demonstrate?
A. The electromagnet's magnetic field becomes stronger as more magnetic material is added to it.
B. The electromagnet's magnetic field is stronger as more turns are added to the wire on the nail.
C. The electromagnet's magnetic field becomes stronger as a small amount of strength is added to the system by the battery.
D. The electromagnet's magnetic field is stronger close to it than far from it.
Answers
The closer together they are the harder it is to hold on to because the magnetic field is stronger as it gets closer.
Answer:
D. The electromagnet's magnetic field is stronger close to it than far from it.
A constant torque of 3 Nm is applied to an unloaded motor at rest at time t = 0. The motor reaches a speed of 1,393 rpm in 4 s. Assuming the damping to be negligible, calculate the motor inertia in Nm·s2.
Answers
Answer:
The moment of inertia of the motor is 0.0823 Newton-meter-square seconds.
Explanation:
From Newton's Laws of Motion and Principle of Motion of D'Alembert, the net torque of a system (\(\tau\)), measured in Newton-meters, is:
\(\tau = I\cdot \alpha\) (1)
Where:
\(I\) - Moment of inertia, measured in Newton-meter-square seconds.
\(\alpha\) - Angular acceleration, measured in radians per square second.
If motor have an uniform acceleration, then we can calculate acceleration by this formula:
\(\alpha = \frac{\omega - \omega_{o}}{t}\) (2)
Where:
\(\omega_{o}\) - Initial angular speed, measured in radians per second.
\(\omega\) - Final angular speed, measured in radians per second.
\(t\) - Time, measured in seconds.
If we know that \(\tau = 3\,N\cdot m\), \(\omega_{o} = 0\,\frac{rad}{s }\), \(\omega = 145.875\,\frac{rad}{s}\) and \(t = 4\,s\), then the moment of inertia of the motor is:
\(\alpha = \frac{145.875\,\frac{rad}{s}-0\,\frac{rad}{s}}{4\,s}\)
\(\alpha = 36.469\,\frac{rad}{s^{2}}\)
\(I = \frac{\tau}{\alpha}\)
\(I = \frac{3\,N\cdot m}{36.469\,\frac{rad}{s^{2}} }\)
\(I = 0.0823\,N\cdot m\cdot s^{2}\)
The moment of inertia of the motor is 0.0823 Newton-meter-square seconds.
Revision. Explain why a gap of a few cm should be left above the water surface when filling a cold car radiator.
Answers
Car's radiator is in charge of regulating the engine's temperature. By moving heat away from the engine, it accomplishes this by continuously moving coolant throughout the system and thermostat.
Thus, Air blowing over the radiator then chills the coolant. Only when the engine is turned off will the car radiator be cold.
The radiator will warm up as the coolant flows through it while the engine is operating. This explains why the radiator in your automobile is cold when the engine is off yet warm when it is on.
Keep in mind that the radiator is merely one component of the cooling system. The thermostat, water pump, and other parts are included in the cooling system.
Thus, Car's radiator is in charge of regulating the engine's temperature. By moving heat away from the engine, it accomplishes this by continuously moving coolant throughout the system and thermostat.
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which issue was not a problem that had to be overcome for humans to travel into space
A.High levels of radiation
B.Extreme hot and cold temperatures
C.Lack of government support
D.Lack of oxygen
Answers
Lack of government support is not a problem faced by humans to travel to space.
What is Space travel?Space exploration or travel refers to employing the use of astronomy and space technology by humans to travel outer space. This is carried out by astronomers using uncrewed robotic space probes and human spaceflight.
Therefore,lack of government support is not a problem faced by humans while traveling to space because it does not require government support and outer space have harsh weather's which are not conducive to humans living on Earth, there is also high level of radiations,emissions of dangerous rays because of it's closeness to sun and also lack of oxygen which can be as a result of non existence of plants that release oxygen during photosynthesis.
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Will the placement of the continents on Earth look different in 100 million years than today?
Answers
Answer:
Yes
Explanation:
Continents is constantly moving, but at very slow rate.
This is due to the movement of the tectonic plate underneath the earth surface.
On average they move about 10 cm per year.
So in 100 million, they will move 10,000 km.
Of course, how the continents looks 100 million years from now will be very different than today.