Explanation:
Newton's law of cooling (or heating) states that the temperature of a body changes at a rate proportional to the difference in temperature between the body and its surroundings. It is a reasonably accurate approximation in some circumstances. dTdt=−k(T−T0), where k is a positive constant.
Answer:
Q=h.A.(T(t)-Tenu)
Explanation:
Why can a ray be used to represent light in a ray diagram?
A. Light waves are electromagnetic waves.
B. Light waves spread out in all directions.
C. Light waves travel in straight lines.
D. Light waves can be reflected or refracted.
Answer: C
Explanation:
A box is placed on the floor.The area of the box in contact with the floor is 2.4m²Pressure exerted on the floor 16 newtons/m²Work out the force exerted by the box on the floor
Answer:
The force exerted by the block on the floor is 38.4 Newtons
Explanation:
The given parameters are;
The area of the box in contact with the floor, A = 2.4 m²
The pressure exerted by the block on the floor, P = 16 N/m²
The force exerted by the box on the floor is given as follows;
[tex]Pressure, P = \dfrac{Force, F}{Area, A}[/tex]
∴ F = P × A
From the question, P = 16 N/m², and A = 2.4 m²
∴ F = 16 N/m² × 2.4 m² = 38.4 N
The force exerted by the block on the floor, F = 38.4 N.
I need the answer to these quick
Answer:
where is the question ??/dude
A gas has a volume of 3.00 L at 10.0 °C.
What is the temperature of the gas if it
expands to 6.00 L, assuming constant pressure?
Which of the following explains why parallax is used to measure stars?
It takes into consideration the changing brightness of stars.
It provides greater accuracy for measuring stars near the earth.
It takes into consideration the changing position of stars.
It provides greater accuracy for measuring stars far from the earth.
D, it provides greater accuracy for measuring stars far from the earth.
The answer is "It provides greater accuracy for measuring stars near the earth."
During a science lesson on changes, Ms. Sloan's students made mixtures of sulfur (the yellow substance) and iron filings (the black substance. Ms. Sloan challenged her students to separate the two substances and one group easily completed the task by using a magnet to lift the iron filings from the mixture. Next, Ms. Sloan poured the same mixture into a test tube and heated it in the Bunsen burner flame. What was the result of heating the mixture?
Answer:
Both substance will melt and become a solution.
Explanation:
When a mixture of iron filings (black substance) and sulphur powder (yellow substance) are heated in a test tube under a bunsen burner, usually they will undergo a chemical reaction where they will melt to form a new solution of ferrous sulphide.
Thus, we can say what happens is that both substances melt to form a solution.
NO LINKS!!!!!! Help its urgent, PLEASE HELP!!!!!!!!!!!!!!!!
Answer: I would say B. Dairy
Explanation: Apple is in the fruit group. Grilled chicken breast is in the protein group. Whole white rice is in the whole grains group and string beans are in the vegetable group.
What is the name of asteroids that stray outside the main belt and cross outside Mars taking them closer to the Sun?
a
Sun-crossing asteroids
b
Mars-crossing asteroids
c
Apollo asteroids
d
Earth-crossing asteroids
Answer:
b im pretty sure (let me know if this is correct!) :)
Explanation:
the atomic number of Krypton si 36. if the mass number of a Krypton atom si 84, which table shows the number of subatómico inside anda outside the nucleus of the Krypton atom?
Answer:
A
Explanation:
You did not list the options. However, knowing the possible options from having seen the material myself - I can infer that the answer option is A. I apologize sincerely if this is wrong.
A boy jumps into an indoor swimming pool. He notices that the water appears to get colder as he
goes deeper underwater. This is due to convection
Which statement is correct?
Cold water is more dense than warm water so it sinks to the bottom of the pool.
Warm water is more dense than cold water so it rises to the surface of the pool.
The molecules in cold water have more kinetic energy than the molecules
in warm water so
they move to the bottom of the pool faster.
The molecules in warm water are closer together than the molecules in cold water so they
rise to the surface of the pool.
Answer:
cold air is more dense than warm water so it sinks to the bottom of the pool
PLS HELP, WILL GIVE BRAINLIEST
What subatomic particle has a negative charge and is found outside of the nucleus?
a. electron
b. nucleus
c. neutron
d. proton
Answer:
A
Explanation:
Hope this helps and have a wonderful day!!!
Answer:
A. electron
Explanation:
The electron is the only negatively charged particle in the answers. The proton is positive. The nutron has a neutral charge. The nucleus isn't really a particle. It's a group of protons and neutrons.
A battery is connected to a 10 resistor and produces a current of 0.2 A in the circuit. If the resistor is replaced with a 20 resistor, what is the new
current in the circuit?
Answer:
0.1 A
Explanation:
From the question,
V = IR............ Equation 1
Where V = Voltage, I = current, R = Resistance.
Given: I = 0.2 A, R = 10 ohms.
Substitute into equation 1
V = 0.2(10)
V = 2 volt,
If the resistor is replaced with a 20 resistor, The nwe current is
I = V/R................ Equation 2
I = 2/20
I = 0.1 A
Lloyd walks faster than
Ronald, with a speed of
about 0.65 m/s. The canteen
is 15 meters away from their
dassroom. How many
minutes will take her to go
to the canteen?
Answer:
Time = 2.6 minutes
Explanation:
Given the following data;
Speed = 0.65 m/s
Distance = 15 meters
To find the time to get to the canteen;
Mathematically, time is given by the formula;
Time = distance/speed
Substituting into the formula, we have;
Time = 15/0.65
Time = 23.08 seconds
To minutes = 60/23.08 = 2.6 minutes
What is the mass of a honda civic if it accelerates at a rate of 15m/s2 when a force of 10N is applied?
Answer:
Explanation: p = mass x velocity = m x v. • p = 1000 x 30 . The product of the force (F) acting on an object and applied force) A 1000 kg Civic is traveling at 30 m/s and ... What is the momentum of the car after accelerating for ... If a 5kg object experiences a 10 N force . Solve: Honda, Camry, collision ... v = -15 m/s
Answer:
second law tells us that a body accelerates when the net force is not zero. ... for situations involving extremely high speeds (near the speed of light) or very ... forces applied at a point on a body have the same effect as a single force ... exerted by the worker, of magnitude 20 N
(Please help! this is for astronomy!)
Given Triton’s response to Neptune’s gravity, which of the following will MOST LIKELY happen?
A) Triton will become a dwarf planet.
B) Triton will become a supernova.
C) Triton will become a star.
D) Triton will become a ring around Neptune.
Answer:
D
Explanation:
Because triton orbits neptune backwards it will fall into neptune giving neptune bigger rings
What is the frequency of a wave when it has a wavelength of 2.17 m and is travelling across a rope at a speed of 31 m/s?
a 10.1 Hz
b 14.3 Hz
c 11.7 Hz
d 16.2 Hz
A wave oscillating on a string has a wavelength of 0.25 m and a frequency of 1.85 Hz. What is the speed of this wave?
a. 1.210 m/s
b. 2.050 m/s
c. 0.2915 m/s
d. 0.4625 m/s
Answer:
i) b. 14.3 Hz
ii) d. 0.4625 m/s
Explanation:
f = c / λ
f = frequency
c = speed
λ = wavelength
first question:
the given values,
λ = 2.17 m
c = 31 m/s
f = c / λ
f = 31 / 2.17
f = 14.28
∴ f = 14.3 Hz
second question:
given,
λ = 0.25 m
f = 1.85 Hz
f = c / λ
rearranging,
c = f × λ
c = 1.85 × 0.25
c = 0.4625
∴ c = 0.4625 m/s
(love your username, btw.)
A swarm of locust eats the leaves of most of the trees in a forest. How would the trees be most directly affected?
Please HELP!
Answer:
A trees food and air source would be deprived because of this. Trees need leaves to perform photosynthesis, so besides their roots soaking up water and nutrients, they wouldn't have any other form of food until those leaves grow back. If they don't and the locusts continue to eat up the tree, it will eventually starve and die.
Explanation:
Imagine the trees trunk and roots as your body and the leaves as your mouth/food source. God Forbid you catch a cold or some sickness. You probably won't have the appetite to eat. Despite that, you'll still have to. But, if you get so sick to the point that eating just makes you throw it up before your body can take in the nutrients and beneficial stuff, you will eventually get to the point where eating is nearly impossible. This will lead up to the sickness taking over your body, as there's no energy going in to help it fight it off, and you would die.
(Gah, sorry for the dark theme... didn't think it would turn like that lol)
Anyways, hope this helped!
Source(s) used: N/A
Ccompare And Contrast How an opaque object and a transparent object affect light.
Transparent objects allow all the light to pass through them, translucent ones allow partial light to pass, whereas opaque ones allow no light to pass through.
Please help me!! I will give brainliest!
Q: How do you determine speed over a crooked path? Explain.
Answer: If you solve for the orbit speed, v, in the mass formula, you can find how fast something needs to move to balance the inward pull of gravity: v 2 = (G M)/r . Taking the square root of both sides (you want just v not v 2), you get v = Sqrt.
Explanation:
Why does no one actually help on here?
Answer: i dontt know everyone is annoying
Explanation:
a rectangular tank measures 12.5 metres long 10.0 wide and 2.0 metre high calculate the mass of the water in the tank when it is full the density of water 1000 kg per metre cube assume the measurement are internal
Answer:
250000kg
Explanation:
Mass =density * volume
Density=1000kg/m³
Volume=l*w*h
12.5*10.0*2.0=250m³
Mass=1000 *250
=250000kg
State
What is the correct order of tasks for washing dishes in a three-compartment sink?
Answer:
The summary of the given statement is explained below throughout the explanation segment.
Explanation:
Drain certain surfaces throughout warm water of such soap during the very first sink. This same sanitizing of bacteria would not destroy whether grime would be in the direction.Exfoliate the plates throughout plain water during the secondary drain. As with grime, the residual soap could avoid the kill off bacteria and viruses by the sanitizer.can someone awnser this
Answer:
The force of gravity exerts a downward force. The floor exerts an upward force. Since these two forces are of equal magnitude and in opposite directions, they balance each other.
anyone know the answer ?
Answer:
a,c,d I thought these are the true statements about these graph
Energy producing technologies can positively impact soil fertility.
Please select the best answer from the choices provided
OT
OF
Answer:
ITS TRUE.
Explanation:
Convert 23.5 mL into L
Answer:
[tex]0.0235l[/tex]
Explanation:
[tex]1l = 1000ml \\ x = 23.5ml \\ \\ x = \frac{23.5 \times 1}{1000} \\ = 0.0235l[/tex]
Hope this helps you.
Can I have the brainliest please?
Answer:0.0235 I hope this is helpful mark me brainlist if correct
Explanation:
To convert any value in milliliters to liters, just multiply the value in milliliters by the conversion factor 0.001. So, 23.5 milliliters times 0.001 is equal to 0.0235 liters.
A6 kg mass moving at 10m/s collides with a 4 kg mass moving in the
same direction at 4 m/s. After the collision both the 6 kg and 4 kg mass
continue to move in the same direction. If the 4 kg mass is moving at
10m/s, what is the speed of the 6 kg mass?
Answer:
Explanation:
mdeemmkdkwdmwdmw
Which of the following are NOT examples of digital information storage?
a) DVD's
b) magnetic hard drives
c) compact disks
d) vinyl records
Write one effect seen on ocean or sea due to gravitation of the moon and the sun.
Answer:
high tides or low tides
Explanation:
Explanation:
It's between high and low tights
A construction worker drops a hammer from a 15 m high building. How fast is it going before it hits the ground?
Answer:
12.1 m/s
Explanation:
v^2-u^2=2as
v^2-0=g(15)
