Both X-rays and gamma rays have higher frequencies than ultraviolet rays
True or False
Answers
Answer:
i believe its True
Explanation:
Related Questions
Which two statements describe part of the frost wedging process
Answers
Rock pores and small fissures allow water to soak in. When water freezes, its volume swells, widening fissures in the rock.
What kind of weathering takes place when water seeps into cracks, freezes, and expands?Two types of physical weathering can be distinguished: Water performs a process known as freeze-thaw when it seeps into cracks over time, freezes, and then expands, eventually breaking the rock.
What causes the expansion of rock fissures when water seeps in and freezes?As the temperature dips below freezing, the water seeps into the cracks in the rocks and expands into ice. The tremendous pressure and wedge-like action of the expansion on the nearby rock causes the cracks to widen. Water that freezes and thaws frequently causes the rock to disintegrate.
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Question:
Which two statements describe part of the frost wedging process?
a) Water enters a crack in a rock.
b) The temperature drops below freezing, causing the water to freeze and expand.
c) The rock heats up and expands, widening the crack.
d) Water evaporates from the crack, leaving behind mineral deposits.
e) Repeated cycles of freezing and thawing cause the crack to widen and deepen.
A wire of a certain length (α = 0.0065 1/°C) has a resistance of 15 Ω at 20°C.
Calculate the temperature at which the resistance will be 22.8 Ω
Answers
The temperature at which the resistance will be 22.8 Ω is 100 °C
How to determine the temperatureThe following data were obtained from the question:
Coefficient of epansion (α) = 0.0065 °C¯¹ Original resistance (R₁) = 15 Ω Original temperature (T₁) = 20 °C New resistance (R₂) = 22.8 ΩNew temperature (T₂) =?The new temperature can be obtained as illustrated below:
α = R₂ – R₁ / R₁(T₂ – T₁)
0.0065 = 22.8 – 15 / 15(T₂ – 20)
0.0065 = 7.8 / 15(T₂ – 20)
Cross multiply
0.0065 × 15 (T₂ – 20) = 7.8
0.0975 (T₂ – 20) = 7.8
Divide both side by 0.0975
T₂ – 20 = 7.8 / 0.0975
T₂ – 20 = 80
Collect like terms
T₂ = 80 + 20
T₂ = 100 °C
Thus, the temperature is 100 °C
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Each tyre of a car has an area of 100 cm2 in contact with the ground. The car has a mass of 1600 kg. The weight of the car is equally distributed amongst the four tyres.The gravitational field strength g is 10 N / kg.What is the pressure exerted on the ground ?
A. 4.0 N/cm2
B. 16 N/cm2
C. 40 N/cm2
D. 160 N/cm2
Answers
The pressure exerted on the ground is 40 N/cm². Hence, option (C) is correct.
What is pressure?It is the ratio between the force being applied and the surface area being applied to. The force delivered perpendicularly to an object's surface per unit area across which that force is dispersed is known as pressure.
SI unit of pressure is Pascal or Newton/meter².
Given parameters:
Mass of the car: m = 1600 kg.
Gravitational field strength: g = 10 N/kg
Area of each tyre of car: a = 100 cm²
Hence, total force applied by the car = mg = 1600 × 10 Newton = 16000 Newton.
As the weight of the car is equally distributed amongst the four tyres; force applied on each tyre = 16000 Newton/4 = 4000 Newton.
Hence, the pressure exerted on the ground = force/area
= 4000/100 N/cm²
= 40 N/cm²
hence, option (C) is correct.
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what is frictional less pulley
Answers
Answer:
Conditions under which the belt and pulleys are operating – The friction between the belt and pulley may decrease substantially if the belt happens to be muddy or wet, as it may act as a lubricant between the surfaces.
Explanation:
I hope that this would be helpful
A question is scientific if you can answer it using which of the following?
O A. A survey of other scientists
O B. Thoughts and feelings
C. Observations and measurements
D. A survey of nonscientists
Answers
A question is scientific if you can answer it using observations and measurements and is therefore denoted as option C.
What is a Scientific question?This type of question leads to the formation of hypothesis in which careful observation is needed to answer it.
The observation may include different forms of measurements to ascertain it authenticity in this scenario.
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An incline plane is 12-m long and 4-m high. A block is pulled up the ramp with a spring scale. The reading on the spring scale is 70-N. How many Newtons would the block actually weigh if you had to lift it the 4-m height?
Answers
Answer:
W = 210 N
Explanation:
For an ideal machine:
\(Work\ In = Work\ Out\\(P)(L)=(W)(H)\)
where,
P = Effort = Spring Scale Reading = 70 N
L = Effort Arm = Length of inclined plane = 12 m
W = Actual Load (Weight) to be lifted = ?
H = Load Arm = Height = 4 m
Therefore,
\((70\ N)(12\ m) = (W)(4\ m)\\\\W = \frac{(70\ N)(12\ m)}{4\ m}\)
W = 210 N
According to the graph below, what is the velocity for segment D?
10 m
D
B
Distance (m)
A
2 m
25
45
6.
100
Time (s)
4 m/s
0-1 m/s
0-3 m/s
O 2 m/s
Answers
Answer:
works in a similar manner: anything above the origin is positive and below the origin is negative. ... a picture of your coordinate system at the start of every problem you do. ... trip, you figure that you went 60 miles in 1 hour, so you were traveling at a ... s m distance that travel to needed time traveled distance speed average.
Explanation:
____ is a type of circuit were there is a direct connection between two points in a circuit that aren't supposed to be directly connected, such as two terminals of a power supply.
Short
Open
Closed
Series
Answers
Answer:
Short
Explanation:
I took the same test
The type of circuit when there is a direct connection lies between two-points should be a short circuit.
What is a short circuit?
It is not the normal condition with respect to an electric circult where the electric current should be flow via the non-intended, also there is short pathway rather following the circuit.
Moreover, there should be a direct linked between the two points in the circuit that supposed to be directly linked.
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what is the weight of a 80kg mass placed on the surface of the earth yake9.8m/s2
Answers
Answer:
48gk
Explanation:
The bearing of grids of an AB alignment is 100º 22', while the magnetic declination is 8º30' E. What are the true azimuth, magnetic azimuth, and grid azimuth of this alignment?
Answers
The true azimuth of the AB alignment is 91º 52' (east of north), the magnetic azimuth is 100º 22' (east of north), and the grid azimuth is 108º 52' (east of north).
To find the true azimuth, magnetic azimuth, and grid azimuth of the AB alignment, we need to consider the magnetic declination. The magnetic declination indicates the angle between true north and magnetic north at a specific location. In this case, the magnetic declination is 8º 30' E, which means that the magnetic north is 8º 30' east of the true north.
To calculate the true azimuth, we subtract the magnetic declination from the grid azimuth. The grid azimuth is given as 100º 22', so subtracting the magnetic declination of 8º 30' E gives us a true azimuth of 91º 52' (east of north).
The magnetic azimuth remains the same as the grid azimuth, which is 100º 22' (east of north).
The grid azimuth is calculated by adding the magnetic declination to the true azimuth. Since the magnetic declination is east, we add it to the true azimuth. Adding 8º 30' E to the true azimuth of 91º 52' gives us a grid azimuth of 108º 52' (east of north).
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Which statements describe surface waves? select three options. they arrive before s waves. they travel slower than p waves. they result in much ground motion. they are produced by p and s waves. they travel deep below earth’s surface.
Answers
Which motor performs more work in the same amount of time- a 10 kW motor or a 20 kW motor? How much more work can it do?
Answers
Answer:
20kw twice the work
Explanation:
A 5.0 Newton force is applied to the right of a 6.0 kg object to move across a smooth surface. The coefficient of friction is zero. a. Draw and label all of the forces acting on the object b. Calculate the acceleration of the object
Answers
Answer:
\(0.833\ \text{m/s}^2\)
Explanation:
m = Mass of block = 6 kg
F = Force on block = 5 N
\(\mu\) = Coefficient of friction = 0
a = Acceleration of the block
From Newton's second law we have
\(F=ma\\\Rightarrow a=\dfrac{F}{m}\\\Rightarrow a=\dfrac{5}{6}\\\Rightarrow a=0.833\ \text{m/s}^2\)
The acceleration of the block is \(0.833\ \text{m/s}^2\)
The unit of length most suitable for measuring the thickness of a cell phone is a . The unit of length most suitable for measuring the height of a backyard tree is a?
Answers
The answers include the following:
The unit of length most suitable for measuring the thickness of a cell phone is a meter.The unit of length most suitable for measuring the height of a backyard tree is a meter.What is Meter?This is defined as the standard unit for measuring the length of a body and is denoted as m.
Height is a vertical type of length which is why meter was chosen as the most appropriate choice.
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what happens when you put foil in the microwave?
Answers
Answer:
The foil makes the microwave spark it can smoke up and catch fie.
Explanation:
-The aluminum foil's sharp edges are what causes the fire, smoke, and sarks.
- Hope This Helps!
-Justin:)
Answer:
itll spark and catch fire
Explanation:
A dog runs after a car. The car is travelling at an average speed of 5 m/s.
how many seconds does it take the dog to run 20 m?
Answers
Answer:
The answer is 4 sExplanation:
The time taken can be found by using the formula
\(t = \frac{d}{v} \\ \)
where
d is the distance
v is the velocity
From the question we have
\(t = \frac{20}{5} \\ \)
We have the final answer as
4 sHope this helps you
Answer:
4 secs
Explanation:
Two identical balls are thrown from the top of a cliff, each with the same speed. One is thrown straight up, the other straight down. How do the kinetic energies and speeds of the balls compare as they strike the ground?
A) The ball that is thrown straight up will have more kinetic energy but less speed than the ball that is thrown straight down.
B) The ball that is thrown straight up will have more kinetic energy and more speed than the ball that is thrown straight down.
Both balls will have the same kinetic energy and speed.
C) The ball that is thrown straight up will have more kinetic energy but less speed than the ball that is thrown straight down.
D) The ball that is thrown straight down will have more kinetic energy and more speed than the ball that is thrown straight up.
Answers
Answer:
the answer is B.
Explanation:
The ball that is thrown straight up has more kinetic energy and more speed than the ball that is thrown straight down. Both balls have the same kinetic energy and speed.
What is the kinetic energy and potential energy?The kinetic energy of a body can be determined as the energy of a moving physical system because of its motion. Work has to be done on an object to change its kinetic energy.
The kinetic energy of the moving system can be expressed as K.E. = ½mv² where ‘m’ is mass while ‘v’ is the velocity of the object.
The potential Energy of the physical system can be described as the energy stored due to its position. The mathematical formula for the calculation of the potential energy can be expressed in the form of P.E = m×g×h where ‘g’ is the gravitational acceleration, ‘m’ is the mass and ‘h’ is the height in meters
When two identical balls are thrown from a cliff, each with the same speed. One ball is thrown straight up, and the other ball is straight down. Both balls will have the same kinetic energy as well as speed.
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How could Sam determine the distance he drove and the true displacement between the two locations
Answers
Distance is the physical length travelled. While the displacement is the shorter distance between any two given points.
What is distance?Distance is a numerical representation of the distance between two objects or locations.
Distance can refer to a physical length or an estimate based on other factors in physics or common use. |AB| is a symbol for the distance between two points A and B.
Displacement is defined as the shortest distance between the two points.
Sam determines the distance by doing the calculation as;
distance = speed × time
Hence, the Sam determines the distance and displacement by the respective formulas.
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Fill in the blanks to complete the sentence.
Light acts like a
when it bounces off surfaces, and acts like a
when it bends around objects.
Answers
The answer is:
Fill in the blanks to complete the sentence.
Light acts like a PARTICAL when it bounces off surfaces,
and acts like a WAVE when it bends around objects.
I hope this helps you :>
Answer:
Particle and wave
Explanation:
PLS HELP!!! Response: Develop a unique example (not posted on the discussion board by anyone else) and calculate the resultant displacement between two points when there are two legs or distinct parts to the trip. Include the displacement of each leg of the trip as well as the resultant displacement of the entire trip. Don't forget: include both the direction and the magnitude as part of the displacement. Research the actual distance between these two points on the globe. Compare the resultant displacements and account for the error. Don't forget: include both the direction and the magnitude as part of the displacement.
Answers
Answer:
he is the first person can be 3in and a 6man is the best not a man of the hartford
5. Suppose a block is drag straight
forward on a flat surface. The block
has
moved 20 m by applying 500 N force.
Calculate the work done by the force
against friction
Answers
= 500 x 20
= 10,000 J
On Planet Y, which has no air, a dropped object falls 9 m in 3 seconds. What is g, the acceleration due to gravity, on that planet?
9.8 m/s2
3 m/s2
2 m/s2
Answers
Answer:
a = 2 m/s^2
which agrees with the third answer option provided.
Explanation:
Recall the kinematic formula for displacement under the action of a constant acceleration "a":
yf - yi = 1/2 a t^2
using the information provided this equation becomes:
9 = 1/2 a (3)^2
solve for a:
9 * 2 / 9 = a
then a = 2 m/s^2
which agrees with the third answer option provided.
. You are alertly driving a car at 40 mph (18 m/s). You come around a bend and see a tree that has fallen across the road 50 m away. Will you be able to stop before you hit the tree
A. on a dry road?
B. On a slippery road?
Show your evidence.
Answers
The phenomenon of waves hitting an obstruction and bending around it is known as diffraction. Moreover, waves can interfere with one another both positively and negatively, creating various wave patterns. Thus, option A is correct.
What is the reason to come around a bend?When waves encounter an object's edge, they can spread in an odd manner known as diffraction. The wave's diffraction spreading or bending is a function of the object's size and wavelength. Water ripples in a ripple tank are a clear way to show diffraction.
To guarantee you are not too close to oncoming traffic and that you are in a position to stop if necessary, keep closely to the left on curves and negotiate tight blind bends in second gear.
Be aware of any potential parked autos at the bend and be prepared for approaching traffic.
Therefore, tires will cling to surfaces other than the wet road, causing you to skid and fall into a ditch or a tree.
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A room with which type of surface will most likely produce an echo?(1 point)
carpet
dirt
foam
glass
Answers
Answer:
The correct answer is "glass".
Explanation:
A room with a smooth and hard surface like the glass is likely to produce an echo because when sound waves hit such surfaces, they bounce back and forth, creating echoes. Soft and porous materials like carpet, dirt, or foam absorb sound waves, reducing the reflection and producing less echo. Therefore, the answer is glass.
A 0.145 kg rock is thrown with a speed of 32.0 m/s at an angle of 400. what is its kinetic energy at the top of its trajectory?
Answers
The kinetic energy at the top of the rock trajectory is 43.57 Joules
The kinetic energy formula and the procedure we will use is:
K.E. = 1/2 m (v*cosθ)²
Where:
v = speedm = massθ = angle Joules = Kg m²*s²Information of the problem:
v = 32 m/sm = 0.145 Kgθ = 40°Applying kinetic energy formula we get:
K.E. = 1/2 m (v*cosθ)²
K.E. = 1/2 * 0.145 kg (32 m/s*cos40°)²
K.E. = 1/2 * 0.145 kg *(24.513 m/s)²
K.E. = 1/2 * 0.145 kg *600.91 m²/s²
K.E. = 87.132 kg m²/s² / 2
K.E. = 43.57 Joules
What is kinetic energy?It is the energy possessed by a body due to its relative motion. It is usually expressed in Joules (J).
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When you slide a box across the floor what force must you push to be stronger than
A) support force
B) friction force
C) gravity
D) air resistance
Answers
Answer:
B) Friction force
Explanation:
if the object is heavy then it will need more force to move it unlike a tennis ball for example.
The diagram shows two sets of vectors that result in a single vector. Four vectors added using the tip to tail method. The first vector is labeled 100 meters and drawn east, the second vector is labeled 250 meters and drawn north, the third vector is labeled 200 meters and drawn east, the fourth vector is labeled 50 meters and drawn north. A last vector, the resultant, is drawn as a dashed arrow from the tail of the first to the tip of the last. What are the first two steps for finding the magnitude of the resultant vector?
1- find the square of the first horizontal vector and the square root of the first vertical vector
2- find the square root of the first horizontal vector and the square root of the second horizontal vector
3- find the sum of the two horizontal vectors and the sum of the two vertical vectors
4- find the difference between the two horizontal vectors and the difference between the two vertical vectors
Answers
Answer:
find the sum of the two horizontal vectors and the sum of the two vertical vectors
Explanation:
made the most sense. you can beat me up if its wrong :D
Answer:
find the sum of the two horizontal vectors and the sum of the two vertical vectors
Explanation:
edge 2021
the comment question the answer is "sum"
the diagram below shows several forced acting on a small object the direction of the object acceleration is towards
Answers
The direction of the object acceleration is towards North West.
The given parameters:
Force at North, = 4 NForce at South, = 1 NForce at East, = 3 NForce at West, = 5 N, and 1 NWhat is a net force?A net force is the sum of all the forces acting on an object.The net force on the object is calculated as follows;
Vertical axis, = 4 N - 1 N = 3N north
horizontal axis, = 3 - (5 + 1) = 3N west
The direction of the resultant force is North west
Thus, the direction of the object acceleration is towards North West.
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The concrete sections of a certain superhighway are designed to have a length of 25.0m . The sections are poured and cured at 10.0°C . What minimum spacing should the engineer leave between the sections to eliminate buckling if the concrete is to reach a temperature of 50.0°C ?
Answers
The minimum spacing the engineer should leave between the sections to eliminate buckling is 0.011 m.
To calculate the minimum space the engineer must leave in other to eliminate bulking, we use the coefficient of linear expansivity of steel.
What is coefficient of linear expansivity?This can be defined as the increase in length, per unit length, per degree rise in temperature.
To calculate the minimum space, we use the fomula below
Formula:
α = ΔL/L₁(t₂-t₁)........... Equation 1
Make L₂ the subject of the equation
ΔL = αL₁(t₂-t₁)........... Equation 2From the question,
Given:
L₁ = 25 mt₁ = 10°Ct₂ = 50°Cα = 11×10⁻⁶ /K ( Cofficient of Linear expansion of steel)Substitute these values into equation 2
ΔL = [11×10⁻⁶×25×(50-10)]ΔL = 0.011 mHence, the minimum spacing the engineer should leave between the sections to eliminate buckling is 0.011 m.
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How do landforms change as a result of earthquakes?
Answers
Answer:
earthquakes usually cause wide cracks in the earth's surface; landslides may also result from earthquakes
Explanation: