When borosilicate glass is undergoing change in temperature, heat is transferred. The specific heat of borosilicate glass is 837.4 J/kg. °C
What is specific heat?The specific heat is the amount of heat stored per kilogram of substance by 1 degree rise in temperature.
Given is the mass of borosilicate glass m =100 g =0.1 kg, heat transferred Q = 309J, temperature change ΔT = 3.69°C
Q = m x Cp x ΔT
309 = 0.1 x Cp x 3.69
Cp = 837.4 J/kg. °C
Thus, the specific heat of borosilicate glass is 837.4 J/kg. °C
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Martin rides his motorcycle at 20 m/s. suddenly he sees a row of stones
blocking the road 170 m ahead. He applies the brakes and the motorcycle is
decelerated at 2 m/s?. Justify will he be able to stop in time?
Answer: Yes
Explanation:
Given
Martin initial speed is [tex]u=20\ m/s[/tex]
Stones is at 170 m ahead
Deceleration [tex]a=2\ m/s^2[/tex]
Using the equation of motion [tex]v^2-u^2=2as[/tex]
Insert the values
[tex]0-20^2=2\times (-2)s\\s=\dfrac{400}{4}\\\\s=100\ m[/tex]
So, it took 100 m to stop completely. Hence martin will be able to stop in time.
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The following map was created using modern technology to determine the overall temperature change of the oceans. What can be concluded about the relationship between temperature and salinity from the map? (10 points)
Group of answer choices
Areas of water with higher precipitation have a greater salinity.
Decreasing temperatures evaporate water slowly, causing an increase in salinity.
Increasing temperatures evaporate water faster, causing an increase in salinity.
The areas of water without temperature changes will have a greater salinity.
Answer:
Increasing temperatures evaporate water faster, causing an increase in salinity.
Explanation:
When the water molecules of the ocean become heated, they expand. ... Since warmer water thus can hold more salt and other molecules than cold water; it can have a higher salinity.
The correct option is C, increasing temperatures cause faster evaporation of water which results in an increase in salinity.
What does the map represent?Due to the link between ocean temperature and salinity, this map of ocean temperature can easily be compared to a map of ocean salinity.Salinity rises as water temperature rises, and vice versa: the lower the water's temperature, the higher the salinity. The Timor Sea, Arafura Sea, and the northern portion of the Coral Sea can all be seen on this map as having higher temperatures than most of the nearby waters. These regions' shallow water and proximity to the equator, as well as the influence of warm ocean currents, are the main causes of these higher temperatures. In turn, that would imply that they experience greater water evaporation, which adds to greater salt concentration, resulting in more salinity in the water than in other locations.Hence we can conclude that as the temperature rises, the process of evaporation takes place more rapidly which decrease the concentration of salt in water, which leads to higher salinity.
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when a wave travels through a medium, the wave transfers
1. mass, only
2. energy, only
3. both mass and energy
4. neither mass nor energy
Answer: 2
Explanation: waves transfer energy without transferring mass
When a wave travels through a medium, the wave transfers: 2. energy, only.
What is a wave?A wave can be defined as a disturbance in a medium that progressively transfers (transports) energy from a source to another location, especially without the transportation of mass (matter).
Generally, the energy of a wave is directly proportional to the square of wave amplitude and the square of its frequency. Thus, a wave transfers only energy without mass when it travels through a medium.
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Which kind of wave is generated by a plucked guitar string as the molecules
of air around it begin to vibrate?
O A. Transverse
O B. Surface
O C. Electromagnetic
O D. Longitudinal
PLEASE HELP
Answer:
longitudinal
Explanation:
Use the drop-down menu to answer the question.
According to "Take a Closer Look", what type of lens is used to correct nearsightedness?
Answer: A.) concave lens
Explanation: i hope this helps shawtay :)
In general, a concave lens (also known as a diverging lens) is used to correct nearsightedness, as stated in "Take a Closer Look." Option C is correct.
What is the lens?A lens is an optical component that is used to refract (bend) and focus light. It is typically made of a transparent material, such as glass or plastic, and has a specific shape that allows it to alter the path of light as it passes through.
Here,
In general, a concave lens (also known as a diverging lens) is used to correct nearsightedness, as stated in "Take a Closer Look."
A concave lens is thinnest at the center and thicker at the edges, which causes light rays passing through the lens to diverge or spread out. By placing a concave lens in front of a nearsighted eye, the lens causes incoming light rays to diverge more before they reach the eye's lens, which then focuses them properly on the retina, resulting in clearer vision.
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Which statement explains how planets move in orbit as supported by Newton’s first law of motion?
Planets can change the direction of their own orbital path.
Planets can change orbits due to their inertia.
Planets in motion will have a constant speed unless acted on by an outside force.
Planets with a greater mass will orbit more quickly than smaller planets.
Answer:
C
Explanation:
When the planet in motion should have the same speed so until it should be acted by an outer force. This statement explained the movement of the planets.
The information regarding the first law of motion is as follows:
In the case when the body is at rest or moves at the same speed on the straight line so it should be the same at rest or a movement until it is acted by an outside force. It is also called as law of inertia.Therefore, the third option is correct.
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Did the strongman pull up or push down to lift the pig
Answer:
pull up???????????????
What is a disadvantage of using nuclear power to produce electricity?
Answer:
The further implementations of nuclear power are limited because although nuclear energy does not produce CO2 the way fossil fuels do, there is still a toxic byproduct produced from uranium-fueled nuclear cycles: radioactive fission waste.
Explanation:
Answer:
Disadvantages of Nuclear Power
The further implementations of nuclear power are limited because although nuclear energy does not produce CO2 the way fossil fuels do, there is still a toxic byproduct produced from uranium-fueled nuclear cycles: radioactive fission waste.
Explanation:
The half life of a radioactive element is 8 hours. A sample of the element is tested and found to contain 6g of the element. How much of the element was present 32 hours before the element was tested? 0.375g 6g 48g 96g
Answer:
m₀ = 96 g
Explanation:
First, we will calculate the no. of half-lives passed:
[tex]n = \frac{T}{T_{1/2}}[/tex]
where,
n = no. of half-lives passed = ?
T = Total time elapsed = 32 h
[tex]T_{1/2}[/tex] = Half-Life = 8 h
Therefore,
[tex]n = \frac{32\ h}{8\ h}\\\\n = 4[/tex]
Now, for the initial amount of element:
[tex]m = \frac{m_o}{2^n}\\\\m_o = m(2^n)[/tex]
where,
m₀ = initial amount of element = ?
m = current amount of element = 6 g
Therefore,
[tex]m_o = (6\ g)(2^4)[/tex]
m₀ = (6 g)(16)
m₀ = 96 g
Light sources create rays of light. These rays leave the source and travel in a
line until they hit a surface.
A.
broken
В.
straight
C.
curved
D.
bent
Answer:
C. curved
Explanation:
researchers have shown that light can also travel in a curve, without any external influence
Why do you see a rainbow when you look at white light through a prism?
please don't send links or files
Group of answer choices
components of white light (colors) were refracted into different amounts by the prism.
different colored of atoms passed through the prism and were knocked out.
the white light’s energy was diverted and converted into visible light.
the prism converted ultraviolet light to visible light.
Answer:
Sunlight is a mixture of colors. When it passes through a glass prism, some of the light is bent, or refracted, more than other portions. And just as sunlight passing through a prism is bent, so is sunlight passing through drops of water. This produces an atmospheric solar spectrum in the sky for all to see: a rainbow.
Explanation:
An object is travelling in a straight line. The diagram is the speed-time graph for
the object.
At which labelled point is the object accelerating at a changing rate?
The point on the graph that object is accelerating at a changing rate is point A.
What is acceleration?
Acceleration of an object is the rate of change of velocity with time.
a = Δv/Δt
where;
Δv is change in velocityΔt is change in timeThus, the point on the graph that object is accelerating at a changing rate is point A.
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a loaded sack of total mass is 1000 gramme falls down from the floor of a lorry 200cm high, calculate the workdone by the gravity of the loads
Answer:
W = 20 J
Explanation:
Given that,
The mass of a loaded sack, m = 1000 g = 1 kg
It falls down from the floor of a lorry 200 cm high, h = 2 m
We need to find the work done by the gravity. The work done by an object under the action of gravity is given by :
W = mgh
Substitute all the values,
W = 1 × 10 × 2
= 20 J
Hence, the required work done by gravity is equal to 20 J.
8. Gravity pulls a skydiver down as air
friction (drag) pushes the skydiver up. Is
this an action-reaction pair?
Answer:
Air resistance is pushing up on the parachute and force of gravity is pulling down so she slows down. This increases friction which slows free fall down. So when the skydiver reaches terminal velocity, the force of gravity is balance by air resistance. But when the forces are balance, there is no acceleration.
on what factors, current sensitivity voltage sensitivity of
a galvanometer depend?
[tex]\boxed{\underline{\bf \: ANSWER}}[/tex]
The current sensitivity of a galvanometer depends upon the following factors :-
number of turns.coil area.restoring force per unit twist.magnetic field.___________
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A person walking in high heals can damages the floor by making small dimples in the floor since all their weight is concentrated on the tip of the high heal. It the person weighs 81 kg and the high of the tip of the high heal is 3.5 cm2, what is the force over the floor?
Given :
Mass of person, m = 81 kg.
Area of high heal, A = 3.5 cm² = 0.00035 m².
To Find :
The pressure applied by the heal on the ground.
Solution :
We know, pressure is given by :
[tex]P = \dfrac{mass}{Area}\\\\P = \dfrac{81}{0.00035} \ N/m^2\\\\P = 231428.57 \ N/m^2[/tex]
Hence, this is the required solution.
10-10x10+10 ..............
Answer:
10-10x10+10=10-100+10=20-100=-80
Answer:
10 is the answer
Explanation:
10-10=0x10=0+10=10
Kinetic energy is the energy of . It increases with and .Potential energy is the energy of or . It increases with , and
Answer:
k is the energy of motion it increase with four of load you carry
calculate the heat required to change 2.0kg of ice at 0°C to water at 0°C
Answer:
160000 calories or 669440 Joules
Explanation:
Using the formula as follows;
Q = L × m
Where;
Q = amount of heat (J)
L = specific latent heat
m = mass (g)
* Latent heat (L) required for melting of ice is 80 calories/grams.
* Mass of ice in grams = 2kg × 1000 = 2000g.
Hence, Q = 80 × 2000
= 160000 Calories
1 calorie = 4.184J
160000 calorie = 160000 × 4.184
= 669440J
Suppose your class invites a person to give a speech. When you test out the sound system in the gym you find there are so many echoes the speaker cannot be understood. What needs to be done to fix this problem?
Answer:
You either need to lower the volume so the sounds intensity is lessened. Or you can pad the walls to absorb the sound rather than defect.
Explanation:
Sound intensity allows it to be heard further, but in an enclosed room it will start returning. Sound will deflect off of hard objects do to its interactions with solids. A softer and foamy material can dampen it.
What element is formed in the following nuclear reaction
Answer:
Oxygen or more precisely, the O-15 isotope.
. A train passes a stationary observer. Which of the following best describes how the amplitude and the
apparent frequency of the sound waves heard by the observer change as the train moves away?
True or False: While steroids are not allowed in chicken production, selective breeding has caused chickens to grow very large, very quickly.
1. True
2. False
Answer:
True.
Explanation:
In biology, selective breeding is the mechanism by which certain traits or a combination of traits are consciously selected in animal breeding or plant breeding and cultivation. Artificial selection is seen as a counterpart to natural selection, the mechanism by which, in nature, individuals are selected who are better adapted to their natural environment. Both processes have the same genetic principles and background. Man selects the individuals with the desired traits to produce progeny, making these traits more and more common.
true or false? rocks have organic materials and fossil remains in them
Answer:
trueeeee
Explanation:
what would be the final temperature of a mixture of water at 40 degree celsius temperature and 60 grams of water at 80 degree celsius temperature
Answer:
T = 60°C
Explanation:
We are given;
Mass of water in both cases as 60g.
Thus; m1 = m2 = 60 g
Temperature of first water; T1 = 40°C
Temperature of 2nd water; T2 = 80°C
Let final temperature be T.
To solve for the final temperature, we will use the formula;
(m1 + m2)T = ((m1•T1) + (m2•T2))
(60 + 60)T = ((60 × 40) + (60 × 80))
120T = 7200
T = 7200/120
T = 60°C
A 1300 kg car traveling with a speed of 3.5 m/s executes a turn with a 8.5 m radius of curvature.
Calculate the centripetal acceleration of the car.
I need the answer please help!
Answer:
1.4 m/s/s (2.s.f)
Explanation:
The formula for centripetal acceleration is:
[tex]a=\frac{v^{2} }{r}[/tex], where v is velocity and r is the radius.
In the question we are given the information that the car has a mass of 1300kg, a velocity of 2.5m/s, and a turn radius of 8.5m which are all the values we need. Therefore we can simply substitute in the values to solve the question:
[tex]a=\frac{3.5^{2} }{8.5} \\a=1.4[/tex]
Therefore the centripetal acceleration of the car is 1.4m/s/s. (2.s.f)
Hope this helped!
What process is represented by this redox equation ? 6H 2 O+6CO 2 C 6 H 12 O 6 +6O 2
Answer:
C. Photosynthesis
Explanation:
The redox reaction given in this question is given as follows:
6H2O + 6CO2 → C6H12O6 + 6O2
In this reaction, water (H2O) reacts with carbon dioxide (CO2) to form glucose (C6H12O6) and oxygen (O2). This is the general equation for PHOTOSYNTHESIS process, which is the process whereby plants manufacture their food (sugar) by combining water and carbon dioxide.
In the equation above, water is oxidized into oxygen, while carbon dioxide is reduced into glucose. This makes it an oxidation-reduction (redox) reaction.
Which action could a student take to produce a longitudinal wave with a large amplitude?
A. Drop a pebble in a pond.
B. Light a candle.
C. Bang on a drum.
D. Stand as still as possible.
Answer:
Bang on a drum.
Explanation:
Amplitude is making loud sounds
Find the height of the coconut from the ground at the moment the arrow hit it.
Answer:
[tex]v = u + at \\ 0 = 45 \sin(20) - 9.81 \times t \\ t = 1.56s[/tex]
All electric charge is based on the what in Atoms
Answer:
c. Protons and electrons
Explanation:
electrons carry out negative charge
protons carry out positive charges