Answer:
The widely accepted theory for the origin and evolution of the universe is the Big Bang model, which states that the universe began as an incredibly hot, dense point roughly 13.7 billion years ago.
When a shot putter exerts a force of 140 N on a 7.5 kg shot, what its is acceleration?
18.67
Explanation:
acceleration=Force÷mass
acceleration=140÷7.5
acceleration=18.67
Answer:
Explanation:
Force,F = mass,m × acceleration due to gravity,g
⇒g=F/m
⇒g=140/7.5
⇒g=18.67 N/kg
What is the momentum of a bowling ball with a mass of 8.9 and a speed of 6.0 m/s
Answer:
53 kg m/s
Explanation:
Momentum = mass × velocity
p = mv
p = (8.9 kg) (6.0 m/s)
p = 53.4 kg m/s
Rounded to 2 significant figures, the momentum is 53 kg m/s.
ANSWER ASAP AND WILL GIVE BRAINLIEST AND POINTS
Which line indicates the orbit of Mars?
Answer choices:
B
D
A
C
Answer:
D
Explanation:
Mars is the planet between Earth and Jupiter, or the 4th planet from the Sun.
Answer:
D is the correct answer
a car travels 60 km in 2 hours 84 km the next 1 hour and then 68 km in 8.9 hours before reaching its destination what was the cars average speed in km / h
Answer:
17.8 km/hr
Explanation:
Average speed = distance / time
The total distance traveled is 60 km + 84 km + 68 km = 212 km.
The total time is 2 hr + 1 hr + 8.9 hr = 11.9 hr.
The average speed is 212 km / 11.9 hr = 17.8 km/hr
It takes 50 N to move a desk 0.4 m high. What is the work done? W=F*d *
a) 20 J
b) 125 J
c) 0.008 J
d) 100J
brainliest for the best answer, asap plz
for science lovers
Answer:
A) 20J
Explanation:
Work = Force x Distance
Force = 50N
Distance = 0.4M
Work = 50 x 0.4 = 20J
if you crash your car how could you decrease the damage to you or the car using the concept of impulse
Explanation:
Crumple zones are sections in cars that are designed to crumple up when the car encounters a collision. Crumple zones minimize the effect of the force in an automobile collision in two ways. By crumpling, the car is less likely to rebound upon impact, thus minimizing the momentum change and the impulse.
If the frequency of a wave is
1000 waves per second, how long does it
take for one wave to pass a certain point?
Answer: the answer is D its in the book If u have it
Explanation:
Light travels approximately 982,080,000 ft/s, and one year has approximately 32,000,000 seconds. A light year is the distance light travels in one year.
Calculate the distance of one light year in feet.
Answer: 3.142656 × 10^16 feet
Explanation: Given that the
Speed = 982,080,000 ft/s, and
Time = 32,000,000 seconds
The formula for speed is:
Speed = distance/ time
Make distance the subject of formula
Since the time is second in one year and speed is ft/s, substitute both into the formula
Distance = speed × time
distance = 982,080,000 × 32,000,000
Distance = 3.142656 × 10^16 feet.
The distance of one light year in feet is 3.142656 × 10^16
Which of the following situations would produce and average velocity of zero
If a (hypothetical) atom with 30 protons and 44 neutrons undergoes alpha decay:
how many protons will be left in the nucleus?
how many neutrons will be left in the nucleus?
Answer:
Protons = 28
Neutrons = 42
Explanation:
Alpha decay is one of radioactive decay in which the atomic nuclei can be illustrated by the emission or loss of helium particles of mass number 4 and proton number of 2
Because mass number is the sum of protons and neutrons, If a (hypothetical) atom with 30 protons and 44 neutrons undergoes alpha decay, 28 protons will be left in the nucleus and 42 neutrons will be left in the nucleus.
how has E=MC2 helped us with our understanding of how stars like our Sun create energy?
Answer: please find the answer in the explanation
Explanation:
E = MC^2
Where
E = energy
M = mass
C = speed of light.
This equation is an eyes opener about the relationship between matter and energy. Its explanation about how matter can become energy and how energy can also give information about matter.
It helps us to understand the fusion and fission of both sun and star particles which eventually give us the result of the magnitude of energy they emit or radiate.
Two waves with amplitudes of 52 units and 98 units come together. Their amplitude, which is measured at a specific point and time, is 46 units. What wave behavior explains this value? A. destructive interference B. constructive interference C. refraction D. diffraction E. partial transmission
Answer: A
destructive interference
Explanation: Interference involves coming together of two waves of the same type. E.g sound waves, water waves e.t.c
Whenever two waves of different amplitude interferes with one another and there is increase in amplitude, this is known as constructive interference.
But whenever there is decrease in amplitude as a result of interference of the two waves, this is known as destructive interference.
If Two waves with amplitudes of 52 units and 98 units come together. Their amplitude, which is measured at a specific point and time, is 46 units. The wave behavior that explains this value is destructive interference because of decrease in the units of amplitude.
Answer:
destructive interference
Explanation: Plato user
Which object has the least amount of kinetic energy?
Spinning top
Ball rolling water falling out of cup
Roller coaster
Answer:
Not sure about the answer but I think its roller coaster
Explanation:
Answer:
golf ball
Explanation:
it is correct on edge
A washing machine heats 10kg of water in each wash cycle. How much energy is saved by washing at 30'c instead of 50'c if the starting temperature of the cold water is 16'c? The specific heat capacity of water is 4200 J/Kg'c
The two equations you can use is in the picture.
8.4 × 10⁵ Joules of heat energy can be saved assuming that there is no heat exchange between the washing machine and the environment.
What is Heat energy?Heat energy is the result of movement of tiny particles called as atoms, molecules, or ions in solids, liquids and gas substances. Heat energy can be transferred from one object to another object.
Let m denote the mass of water and the specific heat capacity of water. The energy required to raise the temperature of that much water by would be:
Q = m × c × ΔT
Washing at 30°C would require a temperature change of
ΔT = 30°C - 16°C = 14°C
Washing at 50°C would require a temperature change of
ΔT = 50°C - 16°C = 34°C
In both situations, c = 4.2 × 10³J.kg/ °C while m = 10kg.
Calculate the energy required in either of the situations as:
Washing at 30°C:
Q(30°C) = c × m × ΔT
Q = 4.2 × 10³J.kg/ °C × 10kg × 14°C
Q = 588000 Joules
Washing at 50°C :
Q (50°C) = c × m × ΔT
Q = 4.2 × 10³J.kg/ °C × 10kg × 34°C
Q = 1428000 Joules
1428000 Joules - 588000 Joules = 8.4 × 10⁵ Joules
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Someone please help me with this
1. A guitar string vibrates with a frequency of 100 Hz and it has a wavelength of 3 cm. Determine the speed of the wave that goes through that guitar string.
2. The speed of sound waves in air is around 340 m/s. Suppose that you hear a dog growl, and the frequency of the growl is 70 Hz. Determine the wavelength of the growl sound waves.
3. You are in a boat on the ocean. Some waves come by and you feel your boat move up and down. You whip out a stopwatch and find that you go up-and-down once every 5 seconds. So, the period of the wave is 5 s. You are watching the waves as you go up-and-down, and you see that the wave crests are 15 meters apart. So, the wavelength is 15 m. Use this information to calculate the speed of the waves.
4. Explain why these two waves have the same speed, even though some of their wave properties are different.
Wave A has a frequency of 3 Hz and a wavelength of 5 m
Wave B has a frequency of 6 Hz and a wavelength of 2.5 m
Answer: I think 1 is 300 metres per second.
Explanation: wave speed= wave length x wave frequency
wave speed = 3 x 100
wave speed is 300 m/s
Electron are _____ charged particles
Answer:
negatively
Explanation:
hope this can help u :3
Answer:
negatively
Explanation:
HIME REMAIN
58:15
If business owners want to increase demand for their goods and services, what is the best action for them to take?
increase their models
increase their projections
decrease their prices
decrease their quantities
Answer:
decrease their prices
Explanation:
If we see demand curve then we can observe that demand for good decreases when price increases and demand for good increases when price decreases.
We also know intuitively that customer are price sensitive. That is their buying behavior changes with price of goods, Consumers prefer lower priced good.
So, if business owners want to increase demand for their goods and services
they should decrease their prices.
Which of the following is an example of a chemical change
Why can a liquid take the shape of the bottom of its container?
A: The particles of a liquid can vibrate within their fixed locations
B: The particles of a liquid can break free from one another and spread out
C: The particles of a liquid can flow around one another to a new location
Answer:
c
Explanation:
bc the molecules are not so tightly packed it can slide past one another or flow to a new location.
Remembering the Battle of Bunker Hill what did general Harry and his troops do
do you believe there is an end to the universe? Explain your answer
What is the average velocity of atoms in 1.00 mol of neon (a monatomic gas) at 465 K? For m, use 0.0202 kg.
Answer: 757m/s
Explanation:
Given the following :
Mole of neon gas = 1.00 mol
Temperature = 465k
Mass = 0.0202kg
Using the ideal gas equation. For calculating the average kinetic energy molecule :
0.5(mv^2) = 3/2 nRt
Where ;
M = mass, V = volume. R = gas constant(8.31 jK-1 mol-1, t = temperature in Kelvin, n = number of moles
Plugging our values
0.5(0.0202 × v^2) = 3/2 (1 × 8.31 × 465)
0.0101 v^2 = 5796.225
v^2 = 5796.225 / 0.0101
v^2 = 573883.66
v = √573883.66
v = 757.55109m/s
v = 757m/s
Match the type of metamorphism to its best definition.
Impact
metamorphism
?
The process in which a
rock changes as a result
of heat generated from
magma.
Dynamic
metamorphism
?
The process in which a
rock changes due to
pressure directed on it.
Contact
metamorphism
?
The process in which a
rock changes because of
extreme heat and pressure
caused by a meteorite
collision with Earth.
Regional
metamorphism
?
The process in which
buried rocks in a large
area are changed by heat,
pressure, and fluids.
Answer:
See Explanation.
Explanation:
Impact metamorphism:
The process in which a rock changes because of extreme heat and pressure caused by a meteorite collision with Earth.
Regional metamorphism:
The process in which buried rocks in a large area are changed by heat, pressure, and fluids.
Contact metamorphism:
The process in which a rock changes as a result
of heat generated from magma.
Dynamic metamorphism :
The process in which a rock changes due to
pressure directed on it.
The typing of metamorphism to its best definition should be explained below.
Matching with the best definition:
Impact metamorphism: The process where a rock changes due to extreme heat and pressure caused by a meteorite collision with Earth.
Regional metamorphism: The process where it should be buried rocks in a large area that should be changed by heat, pressure, and fluids.
Contact metamorphism: The process where a rock changes as a result
of heat generated from magma.
Dynamic metamorphism : The process where a rock changes due to
pressure directed on it.
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What is true about an electric field around a positive charge?
A The electric field points inward.
B The electric field points in both directions.
C The electric field points outward.
Answer:
C
Explanation:
the electric field point radically away from the charge
WHAT IS CHANGE OF STATE
Answer:
a change from one state (solid or liquid or gas) to another without a change in chemical composition
Explanation:
Explanation:
From Solid to. Liquid to Gas A change of state is the change of a substance from one physical form to another. All changes of state are physical changes. The particles have different amounts of energy when the substance is in different states.
Electric circuit questions,,, plz help me
How is work related to force and displacement?
Answer:
Displacement is the distance and direction an object is moved. Force and work are directly proportional to each other, while force and displacement are indirectly propotional. The equation showing the relationship is W= Fd. OR Work is a scalar. The rate at which work is done or at which energy is transferred. Work is equal to the force parallel to the displacement.
Explanation:
Work is related to force and displacement as the work is the product of the displacement and the force.
What is work done?The total amount of energy transferred when a force is applied to move an object through some distance
The work done is the multiplication of applied force with displacement.
The SI unit of work done by an object is Joules.
IJ is the work done when a force of 1 N displaces an object by 1 m .
work is the product of displacement and force.
Work Done = Force * Displacement
For example, let us suppose a force of 100 N is used to displace an object by a displacement of 50 m then the work done on the object can be calculated by the above-mentioned formula
work done = 100 N ×50 m
=5000 N m
Thus, we can say the work done on an object depend on the force as well as the displacement, as the work is the product of the force and the displacement
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When waves travel through water, why do the moving water particles continue to return to their starting position?
OA.
Waves transfer matter, but not energy.
Waves transfer both matter and energy.
OC.
Waves transfer energy, but not matter.
OD.
Waves don't transfer matter or energy.
Answer:
Waves transfer energy, not matter
Explanation:
Write down the equation that links energy transferred, charge flow, and
potential difference.
Answer:
The description of the given scenario is described in the explanation segment below.
Explanation:
As a charge passes through some kind of potential gap, the electrical task is undertaken as well as energy will be transferred. The Potential difference seems to be an amount of work performed per unit charge and is denoted by "V" as well as a charge is denoted by "Q".The energy transferred could be determined by using the following equation or formula:
⇒ Energy transferred = charge × potential difference
The equation that links energy transferred, charge flow, and potential difference (voltage) is: [tex]E = qV[/tex]
In Science, when a potential difference (voltage) is applied on an object, it gains some potential energy, which is then converted to kinetic energy.
The kinetic energy possessed by the object is responsible for the movement of electrons from one point to another in an electric field.
Hence, the quantity of energy in an electric circuit is directly proportional to the charge and potential difference (voltage) applied on the object.
Mathematically, the energy transferred in an electric field is given by the formula:
[tex]E = qV[/tex]
Where:
E is the energy transferred.q is the charge.V is the potential difference.Read more: https://brainly.com/question/23153766
When transferring electric charge, an object becomes negative when it
a) loses protons
b) gains electrons
OC) loses electrons
d) gains protons
e)
a and d are correct
Answer:
b) gains electrons
Explanation:
When transferring electric charge, an object becomes negative when it gains electrons
