Answer:
two or more substances
Explanation:
A chemical reaction can't take place if there is only one substance
Answer:
A chemical reaction is the change that takes place when two
or more substances interact to form new substances.
Explanation:
Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.
what two forces contribute to the nuclear tug of war in an atom
Answer:2 protons and 2 neutrons
Explanation:In Nuclei, There are 2 forces. 1 force is electrostatic and acts as repulsion between 2 protons. The other is force of attraction called Nuclear force between 2 neutrons.
IV. The table below shows how the speed of a car changes with time. 1 What is the acceleration of the car? please help! :(
can someone please help me I will mark you as brilliant.
The current in a resistor is 5 A and the voltage between its terminals is 40 V. Calculate the resistance.
An iron wire has a resistance of 24 Ω. If the voltage across its ends is 12 V, calculate the current in the wire.
Answer:
1=8 ohms 2=0.5 Amps
Explanation:
Which of the following would have the greatest force of gravitational attraction?
a 10 kg object 2 meters from a 5 kg object
a 10 kg object 1 meter from a 5 kg object
two 5 kg objects 2 meters apart
two 10 kg objects 1 meter apart
Answer:
two 5kg objects 2 meters apart✨
Two sound sources send identical waves of 20 cm wavelength out along the +x axis. At what minimum (non-zero) separation of the sources will a listener on the axis beyond them hear: (a) the loudest sound (b) the weakest sound?
Is it safe to travel to the moon in a total lunar eclipse ? If you answer I will mark you as BRAINLIEST
Answer:
Yes. The area around you would be a bit red I think.
A diverging lens will always produce an image with _______.
a) a negative focal length and a magnification more than 1
b) a positive focal length and a magnification more than 1
c) negative focal length and magnification less than 1
d) a positive focal length and a magnification less than 1
Answer:
Option C
Explanation:
Diverging lens are negative lens as they have negative focal length. Their
magnification is smaller than one.
They produce virtual image in which the refracted rays extended back in order to meet
Hence, option C is correct
If the surface becomes smaller the pressure becomes
Answer:
Greater
Explanation:
Have a nice day
please mark me brainliest if this helps
Answer:
if the surface becomes smaller, the pressure becomes larger,
Complete the wording of the Law of Conservation of Matter and Energy (as defined in the text).
"Neither _____ nor _____ can be created or destroyed, but they can be changed from one form to the other."
distance
weight
motion
density
energy
matter
(more than one answer choice)
Answer:
Neither "matter" nor "energy" can be created or destroyed, but they can be changed from one form to the other.
Explanation:
calculate:An elcetric lamp is rated 240V and 40W. What is the cost of running the lamp for 62 hours if the elctricity authorities charges #2.50k per KWH
Explanation:
The voltage of the lamp, V = 240 V
Power of the lamp, P = 40 W
It is running for 62 hours.
The cost of running is $2.50k per KWH
Electric power is,
P = 40×62 Wh
= 2480 Wh
P = 2.48 kWh
At the rate of $2.5 per kWh
P = $6.2
So, the cost of running is $6.2 per kWh.
if a current of 0.3 ampere flows through a conductor of resistance of 11.7 ohm's,the voltage across the ends of the conductor is what
Here,
Resistance = 11.7
Ampere = 0.3
Voltage = ?
Now,
R = V/A
11.7 = V/0.3
11.7*0.3 =V
V = 3.51
I hope it's help you...
Mark me as brainliest...
if escape velocity and orbital velocity of a satellite for Orbit close to the Earth's surface then these are related by
Answer:
The ratio of the escape velocity to the orbital velocity is [tex]\sqrt 2[/tex].
Explanation:
The minimum velocity given to an object so that it escapes from the earth's gravitational pull is called escape velocity.
The formula of the escape velocity is
[tex]v=\sqrt\frac{2GM}{R}[/tex]
The velocity of an object in the orbit around the earth is called orbital velocity.
The formula of the orbital velocity is
[tex]v=\sqrt\frac{GM}{R}[/tex]
The ratio of the escape velocity to the orbital velocity is
[tex]\frac{v_e}{v_o}=\sqrt 2[/tex]
The initial momentum of a system is measured at 300 kg•m/s. Afterwards, the
momentum is measured to be 280 kg•m/s. What is the impulse of the system?
In which of the following do two smaller atoms fuse to form a larger atom?
Fission.
Fusion.
Neither
Both
Answer:
Fusion
Explanation:
A chemical reaction can be defined as a reaction in which two or more atoms of a chemical element react to form a chemical compound.
On the other hand, a nuclear reaction can be defined as a reaction in which the nucleus of an atom is transformed by being joined (fusion) or split (fission) with the nucleus of another atom of a radioactive element.
This ultimately implies that, during fusion, two smaller atoms fuse to form a larger atom. Thus, fusion involves the joining of two smaller nuclei of atoms to form a single massive or heavier nucleus with the release of energy.
Additionally, the energy that holds the neutrons and protons found in the nucleus of an atom together is known as Nuclear energy.
True or false please help I’ll give brainliest
Answer:
7. F
8. T
Explanation:
7. An anion is indicated by a negative superscript charge (- something) to the right of the atom. For example, if a sodium atom loses one electron, it will have one more proton than electron, giving it an overall +1 charge. The chemical symbol for the sodium ion is Na+1 or just Na+
8.Like charges repel each other; unlike charges attract. Thus, two negative charges repel one another, while a positive charge attracts a negative charge. The attraction or repulsion acts along the line between the two charges
1.) False
2.) True
hope this helped,, good luck!! :]
Why does Quito, Equator has very little changes to the daylight hours
throughout the year?
Because of the position on the equator, the change in rotation of the Earth on its axis throughout the year doesn't affect it much. Unlike the poles, Quito is almost constantly in direct view of the sun. So, because of lack of change in rotation, the daylight hours are hardly varied as Quito is almost constantly in more or less the same spot in relation to the sun.
calculate the answer to the correct number of significant digits
0.055 * 5.1 =
Answer:
0.055 * 5.1 = 0.2805
Explanation:
I used a calculator so it should be accurate! yw!! :D
Tâm ống dẫn đặt dưới đường phân giới giữa nước và thuỷ ngân h1 = 820mm, chênh lệch chiều cao cột thuỷ ngân h2 = 880mm (Hg = 13,6). Ap suất dư tại điểm A trong ống dẫn (at)?
Answer:
P = 79993.43245
Explanation:
Được -
Vị trí tâm ống dẫn dưới đường thuỷ ngân h1 = 820 mm
Chênh lệch chiều cao của cột thủy ngân h2 = 880mm
Tỷ trọng của thủy ngân = 13,5951 g / cm3
P = mật độ * gia tốc do trọng lực a * h
Thay thế các giá trị đã cho, chúng ta nhận được -
P = 13,5951 g / cm3 * 980,665 cm / s2 * (88-82) cm
P = 79993.43245
can someone please help
Answer:
The last one
Explanation:
Pick the last one : )
least count of vernier caliper is dash
Answer:
0.02 is the count of vernier caliper.
Answer:
0.01 mm
A Vernier calliper scale can have a minimum count of 0.01 mm, while a micrometre can have a minimum count of 0.001 mm.
A 45.2 kg softball player slides across dirt with Uk=0.340. What is her acceleration?
Answer:
The answer is -3.34 m/s^2.
Explanation:
I used another brainly question to help me find the answer. It was pretty similar to this one so yeah. Good luck to you nonetheless.
https://brainly.com/question/25065591
HELPPPP I NEED THIS DONE PLSSS
Answer:
11. Food Chain
12. Food web
13. Habitat
Explanation:
The difference between food chain and food web is;
In a food chain, it shows one path of energy in one ecosystem.
In a food web, it shows various food chains in many ecosystems and how they are connected.
what is it called when a body covers certain distance per unit time
Explanation:
Hey there!
The answer is Speed.
Reason:
Simply we know that distance (d) = speed*time
and speed = distance/ time. And according to the question, when a body covers certain distance/unit time, it's speed.
Hope it helps!
A cell has an emf of 1.5 V and an internal resistance of 0.65 Q.
The cell is connected to a resistor R.
[0[8].[4] State what is meant by an emf of 1.5 V.
[2 marks]
I
[0] 8]-[2] The current in the circuit is 0.31 A.
Show that the total power output of the cell is approximately 0.47 W.
[1 mark]
[o[s).[3] Calcutate the energy dissipated per second in resistor R.
[2 marks]
energy dissipated per second = Ist
[o[si.[4] The cell stores 14 kJ of energy when it is fully charged. The cell's emf and internal resistance are constant as the cell f discharged.
Calculate the maximum time during which the fully-charged cell can deliver energy to
resistor R.
[2 marks)
maximum time = 5
Answer:
14000 J / 0.40 J/s = 35 000 s or about 9.75 hrs
Which is affected more by an earthquake, : deep sea or less deep sea???
Answer:
deep sea will obviously be more affected because of the sea floor shaking
Answer:
deep see
because of the earth inside part highly pressure
Explain how you would apply any five pricing techniques to attract customers
Answer:
Explanation:
1. DECOY PRICING
This occurs when customers make a purchase they must often choose between products with different prices and attributes.
This method of pricing is meant to influence the consumer's purchasing decision and maximise the sales of one particular product. The seller will offer at least three products; two of the products will have a similar or equal price. The two products with the similar prices should be the most expensive ones, and one of the two should be less attractive than the other.
2. LOSS LEADER
This is when a product is sold at a low price (often without profit) in order to stimulate other profitable sales or to attract new customers.
The main is that it will help the business to expand their market share as a whole. It's common practice when first entering a market as it introduces new customers to a service or product in the hope of building a customer base and securing future
3.ODD PRICING
This is a method of psychological pricing a product. Prices ending in 9, 95, 97, 99 are sometimes called “charm prices” and in this type of pricing, the seller fixes a price where the last digits are odd numbers. This is intended to give the buyer no room for manœuvering or for bargaining as the price appears to be less - a product priced at £9.99 will seems much cheaper than one priced at £10.00
4. PRICE DISCRIMINATION
The purpose of price discrimination is to capture the market's consumer surplus and generate the most revenue possible for a product. Identical goods or services are sold at different prices from the same provider to different segments of the market. Industries that commonly use price discrimination include the travel industry, pharmaceuticals and textbook publishers.
5. PRODUCT BUNDLE PRICING
Using this method, sellers will combine several products in the same package. It also serves to move old stock. Blu-ray and videogames are often sold using the bundle approach once they reach the end of their product life cycle. This technique is used at auctions where one attractive item may be included in a lot with a box of less interesting things. Buyers must bid for the entire lot. It’s a good way of moving slow selling products, and in a way is another form of promotional pricing.
HELPPP I don't understand this omg
Answer:
unbalanced
750
forward
Explanation:
Basically fill in the blanks
Which energy store is increased when an object is heated?
Answer:
Kinetic Energy
Explanation:
Anwser this Question I will BrainElist You
Answer:
See explanation below
Explanation:
1) Mass
2) Mass
3) Weight
4) Weight
A person is pushing a box across a table. The measured forces on the box are 10N, 14N, -7N, -10N.
Which force is represented by -7N?
A) force of friction
B) normal force
C) force of gravity
D) push force
Answer:
the answer to this question is c
Answer:
A) force of friction
Explanation:
frictional forces are always negative, they are an opposing force they act opposite to the applied force.