Answer:
1
Explanation:
Give examples to show that friction is both friend and foe ?
Answer:
friction as friend
It helps us to hold or catch any objectit alos helps us to walk easilyfriction as foe
It causes wear and tear of tyresit also cause great damages to parts of machinehope it helps
Answer:
Wear and tear of soles of our shoes is due to friction.
When a tyre deflates, it is difficult to move the vehicle because of increased friction between the tyre and the road surface.
Machines get heated up and produce noise because of friction.
Electromagnetic waves moving through time and
space produces what type of energy?
Answer:
motion example of kinetic energy charged particle such as electrons and protons create electromagnetic field when they move in this field transport the type of energy vehicle electromagnetic radiation or light
all of the following describe the motion of an object except
mass
speed
velocity
acceleration
The bottom of the hockey stick is called a?
Answer:
Blade Heel.
Explanation:
Brainliest please!!!
How can you determine if a circuit is a series circuit or parallel circuit
Answer: A circuit is said to be a parallel circuit if the electrical components are connected in a parallel configuration or their end are connected to a common point. It forms multiple loops or pathways for the current to flow. A circuit is said to be a series circuit if the components are connected in a series configuration or cascaded formation in a single line. A series circuit forms a pathway that has only one loop, therefore, the current flowing through components is the same and the voltage divides depending on the resistance of each component.
Explanation:
What is the mass of a car traveling at a velocity of 16 meters per second with a kinetic energy of 130, 048 joules
Explanation:
KE = ½ mv²
130,048 J = ½ m (16 m/s)²
m = 1016 kg
Why is a frame of reference important for describing
motion?
Answer:
the frame of reference requires deciding where the object's initial position is and which direction will be considered positive.
Explanation:
What is the velocity of a 2000 kg truck with a momentum of 48,000 kg•m/s?
Answer:
24
Explanation:
momentum= mass* velocity
velocity= momentum/ mass
If an engine does 400 J of work in 5 s, how much power was generated?
A.8W
B.8000W
C.800W
D.80w
Answer:
the answer is c
Explanation:
A city that is far inland is
typically cooler and drier than a city near the Gulf of Mexico.
Disagree or agree?
Why?
Answer:
In Texas, a city that is far inland is typically cooler and drier than a city near the Gulf of Mexico. Alaska is surrounded by cold water, so the state experiences more hurricanes than most areas of the United States. Ocean currents move cold water from the tropics to the poles where the water warms.
Wind is:
A) Electricity
B) A type of sound
C) A type of precipitation
D) The movement of air molecules
Answer:
d
Explanation:
ignore this part djnddjkd
A motorist wishes to travel 40 kilometers at an average speed of 40 km/h. During the first 20 kilometers, an average speed of 40 km/h is maintained. During the next 10 kilometers. however, the motorist averages only 20 km/h. To drive the remaining 10 kilometers and average 40 km/h, the motorist must drive
a) 60 km/h. b) 80 km/h. c) 90 km/h. d) faster than the speed of light
poste en français s’il vous plaît
Pls I need help
Boom pah pah
Which two factors affect the electric force between two particles?
A. Gravitational force
B. The strong nuclear force
C. Their charges
D. The distance between them
E. Their mass
Answer:
A. Gravitational force
C. Their charges
Explanation:
As we'll discuss in this lesson, he found that the force between charged particles was dependent on only two factors: the distance between the particles and the amount of electric charge that they carried.
Hope it help you
have a good day :)
can someone help me answer the questions 1-6 please ?!
Answer:
1- when carbon dioxide concentrations rise, air temperatures go up, and more water vapor evaporates into the atmosphere—which then amplifies greenhouse heating
2-Human activities emit 60 or more times the amount of carbon dioxide released by volcanoes each year. ... In fact, several individual U.S. states emit more carbon dioxide in a year than all the volcanoes on the planet combined do. On the scale of carbon dioxide emissions, human sources far outweigh volcanoes
3-Human activities such as the burning of oil, coal and gas, as well as deforestation are the primary cause of the increased carbon dioxide concentrations in the atmosphere.
4-rising maximum temperatures.
rising minimum temperatures.
rising sea levels
your choice u can write this too (Increased heat, drought and insect outbreaks, all linked to climate change, have increased wildfires. Declining water supplies, reduced agricultural yields, health impacts in cities due to heat, and flooding and erosion in coastal areas are additional concerns)
5-It leads to a decrease of ozone, which protects the Earth from the Sun's heat. ... It includes greenhouse gases, which trap heat in the Earth's atmosphere again u can write this aswell(Global warming is primarily caused by emissions of too much carbon dioxide (CO2) and other heat-trapping gases into the atmosphere when we burn fossil fuels to generate electricity, drive our cars, and power our lives. These heat-trapping gases spread worldwide and remain in the atmosphere for decades to centuries)
6-CO2 levels are determined by the imbalance between carbon sequestration (burial in sediments, capture by plants), and carbon emissions (rock weathering and volcanic activity). Imbalances in this system created a downward trend in CO2 levels, leading to a glaciation period around 300 million years ago.
Explanation:
Which of the following is an example of heat transfer by convection?
A. A heat lamp shining infrared light on French fries.
B The fan on a space heater blowing warm air into a cold room.
C. When one end of a metal rod is in a fire, the other end gradually becomes
D. The transfer of energy from the sun, across the vacuum of space.
Answer:
C
Explanation:
urgent please help
What is the relationship between Pressure and Volume?
A. Directly related
B. Inversely related
Answer:
B. InverselyExplanation:
For a fixed mass of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional. Or boyle's law is a gas, law, starting that the pressure and volume of a gas have an inverse relationship. If volume encreases, then pressure decreases and vice versa,when the temperature is held constant.
Can you mark me brainliest please!!! Or mark me brainless just kidding (^o^)Lolwhat happens inside of a star?
Answer:
In the centre of a star, the temperature and pressure are so high that four protons can fuse to form helium, in a series of steps.
Explanation:
A car travels 52 mph for 6 minutes, 46 mph for 3 minutes, 40 mph for the remaining time during a 30 minute journey. find the total distance travelled
Answer:
21.5 miles
Explanation:
Distance = Speed * time
Distance traveled in first 6 minutes = 52 * [tex]\frac{6}{60}[/tex] = 5.2 miles
Distance traveled in next 3 minutes = 46 *[tex]\frac{3}{60}[/tex] = 2.3 miles
Remaining minutes = 30 - 6 -3 = 21 minutes
Distance traveled in 21 minutes = 40 * [tex]\frac{21}{60}[/tex] = 14 miles
Total distance traveled = 5.2 + 2.3 + 14 = 21.5 miles
3 kg
2 kg
1 kg
Three masses are arranged in a stack and kept at rest on the floor.
Calculate the total normal force acting on the system.
Answer:
The total normal force acting on the system is approximately 58.8 N
Explanation:
The masses arranged in the stack are;
3 kg, 2 kg, and 1 kg
The mass of the stack system, m = 3 kg + 2 kg + 1 kg = 6 kg
Weight = The force of gravity on an object = m·g
Where;
m = The mass of the object
g = The acceleration due to gravity ≈ 9.8 m/s²
∴ The weight of the stack system, W ≈ 6 kg × 9.8 m/s² ≈ 58.8 N
The direction of the weight force = Perpendicular to the surface (acting downwards)
From Newton's third law of motion, the normal force acts perpendicular to the plane and it is equal in magnitude to the force acting perpendicular to the plane
∴ The magnitude of the total normal force acting on the system = The magnitude of the weight of the system ≈ 58.8 N
The (magnitude of the) total normal force acting on the system ≈ 58.8 N
I need help! anyone trynna help?
Answer:
300 pascals
Explanation:
P=F/A
P=15N/0.05
P=300 pascals
help plz .............
Answer: l
Explanatiok
jiki
How much power does it take to lift 20.0 N 5.0 m high in 5.0s?
Answer:
Explanation:
20 watts
I need help asap
What is a homopolar motor?
a. The first electric motor ever made.
b. A motor made by in the North Pole.
c. A motor used in homes in the winter.
Answer: The answer is A
Explanation:
When a 0.38 kg block is suspended on a vertical spring, it causes it to stretch 3.5 cm. If the block is now pulled 7.5 cm below its equilibrium position and released, what is the speed of the block when it is 4.2 cm below the equilibrium position?
Answer:
w = 16.73 rad / s, v = - 1.04 m / s
Explanation:
This is an exercise in oscillatory motion of a system of a spring and a mass, the angular velocity is
w = [tex]\sqrt{ \frac{k}{m} }[/tex]
To calculate the spring constant we use the data that Δx = 3.5 cm = 0.035 m with a mass of m = 0.38 kg, let's write Hooke's law
F = -kx
in this case the applied force is the weight of the body
F = W
we substitute
mg = k x
k = m g / x
k = 0.38 9.8 / 0.035
k = 106.4 N / m
let's find the angular velocity
w = Ra 106.4 / 0.38
w = 16.73 rad / s
the movement of this system is described by the expression
ax = A cos (wt + Ф)
the quantity A is called the amplitude of the movement in this case A = 7.5 cm = 0.075 m
to encode the constant we use that the system is released from its position of maximum displacement (x = A)
we substitute
A = A cos (0 + Ф)
cos Ф = 1
Ф = cos-1 1
Ф = 0º
by substituting in the equation of motion
x = 0.075 cos (16.73 t)
Let's find the time it takes to reach the desired position x = 4.2 cm = 0.042 m
cos 16.73 t = 0.042 / 0.075 = 0.56
16.73 t = cos -1 0.56
remember that angles must be expressed in radians
t = 0.976 / 16.73
t = 0.0583 s
body velocity is
v = [tex]\frac{dx}{dt}[/tex]
v = -0.075 16.73 sin 16.73t
let's calculate for the time found
v = - 1.25475 sin (16.73 0.0583)
v = - 1.04 m / s
Learning Task 2: Write the words that can be associated with the ''Music During Classical Era''. You may ask help from the members of your family or search the internet if you have the means. Do this activity in your notebook.
Answer:
classical
concert
exposition
orchesta
devolopment
recapitulation
sympathy
sonata
sinfonia
soloist
Explanation:
I NEED HELP PLEASE !!!!
Find the impulse that acts on the object during the time interval 10s to 20s
Answer:
I guess it's force hope this answer helps
Which statements best describe displacement? Check all that apply.
Displacement is measured along the path an object travels.
Displacement is a measurement that includes direction.
Displacement is the difference between a starting point and an ending point.
Displacement is how far an object travels from starting point to ending point.
Displacement is measured as a straight line between a starting point and an ending point.
Pls help,Will mark brainliest if correct :)
Answer:
the last one, the third one, and the first one.
Answer:
Displacement is a measurement that includes direction, displacement is the difference between a starting point and an ending point, and displacement is measured as a straight line between a starting point and an ending point.
Explanation:
what is the mass of vertical column of air that exerts pressure of 1 atm over a10m by 10m square surface
Answer:
[tex]m=1.01\times 10^6\ kg[/tex]
Explanation:
Given that,
Pressure, P = 1 atm = 101325 Pa
Area of the square surface, A = 10² = 100 m²
We need to find the mass of vertical column of air. We know that, pressure is equal to the force acting per unit area. So,
[tex]P=\dfrac{mg}{A}\\\\m=\dfrac{PA}{g}\\\\m=\dfrac{101325\times 10^2}{10}\\\\m=1.01\times 10^6\ kg[/tex]
So, the required mass of the vertical column of air is [tex]1.01\times 10^6\ kg[/tex].
(b) The output current of the generator is 2.0A. The output potential difference (p.d.) of the
generator is 11V.
(1) Calculate the output power of the generator. Electrical Power = Pd x curren
output power =
[2]
Answer:
P = 22 watts
Explanation:
Given that,
The output power of the generator = 2 a
The output potential difference = 11 V
We need to find the output power of the generator. The formula for the output power is given by :
[tex]P=V\times I\\\\P=11\times 2\\\\P=22\ W[/tex]
So, the output power of the generator is equal to 22 Watts.