Answer:
The atomic number of Aluminum is "13"!
Explanation:
The 27 means the atomic mass is 27 . The number of protons plus the number of neutrons is 27. That means the number of neutrons is 27–13=14. Number of neutrons depends on the isotopic form of aluminium.
Stephanie goes on a giraffe safari in Africa. She travels 8 km north, then 3 km west and then 2 km south.
What distance did she cover and what was her displacement
Answer:
distance =13km , displacement=3km
Explanation:
north south does not affect displacement
Which property increases as an electromagnetic waves energy decreases
Answer:
Wavelength
Explanation:
Answer:
wavelength
Explanation:
ape x
Kinetic energy and mass are ________ proportional.
Answer:
The Kinetic energy and mass are _directly_ proportional.
Explanation:
We know that Kinetic Energy is basically termed as the capacity of a body to do work.
Kinetic energy is often used to associate with moving objects, therefore, K.E is normally termed as the energy of motion.
The formula of K.E of an object of mass and velocity is defined
K.E = 1/2mv²
From the formula, it is clear that K.E is directly proportional to its mass and also directly proportional to the square of its velocity.
For example,
If A toy plane with a mass of 10 kg is flying at 20 m/s. Its K.E will be:
m = 10 kgv = 20 m/sK.E = 1/2mv²
= 1/2(10)(20)²
= 1/2(10)(400)
= 5(400)
= 2000 J
Now, let suppose, if we double the mass of a toy plane i.e.
m = 20 kg
so
K.E = 1/2mv²
= 1/2(20)(20)²
= 1/2(20)(400)
= 10(400)
= 400 J
Therefore, the K.E is doubled when doubled the mass.
Therefore, the Kinetic energy and mass are _directly_ proportional.
Answer:
directly
Explanation:
A change of position is called
o distance
O velocity
O speed
O displacement
In your own words tell me about the live cycle of a star (4-5 sentences)
Answer: Stars are formed in clouds of gas and dust, known as nebulae. Nuclear reactions at the centre (or core) of stars provides enough energy to make them shine brightly for many years. The exact lifetime of a star depends very much on its size.
Explanation: I try to do your question, hope this help
A toy plane with a mass of 20 kg is flying at 10 m/s. What is its kinetic energy?
A. 1 000 J
B. 200 J
C. 2 000 J
D. Cannot be determined
Answer:
1000J
Explanation:
Given parameters:
Mass = 20kg
Speed = 10m/s
Unknown:
Kinetic energy = ?
Solution:
To solve this problem, we use the kinetic energy equation:
Kinetic energy = [tex]\frac{1}{2}[/tex] m v²
m is the mass
v is the speed
Now insert the parameters and solve;
K.E = [tex]\frac{1}{2}[/tex] x 20 x 10² = 1000J
A gold ball has a mass of 45g. In a speed test, a golf ball was driven from rest to a velocity of 90m/s.
a) If the time taken for the golf ball to reach this velocity was 0.0005 seconds. What acceleration was this?
b) What forces was applied to the golf ball?
Answer:
1)
Acceleration (a)=change in velocity/ change in time
Velocity (v)=90m/s
Time=0.0005s
a=90/0.0005
The acceleration =180000m/s^2 or 180km/s^2
Force = mass x acceleration
m=40g= 0.04kg
F= 0.04x 180000
F= 7200N or 7.2kN
Explanation:
Which statement correctly describes the relationship between a blackbody radiator, its temperature, and the electromagnetic radiation it gives off? A. As the blackbody radiator becomes warmer, it emits light of shorter wavelengths.
B. As the blackbody radiator becomes warmer, it reflects different wavelengths of light.
C. As the blackbody radiator becomes warmer, it emits random wavelengths of light.
D. As the blackbody radiator becomes cooler, it emits light of shorter wavelengths.
It's A
Answer:
A. As the blackbody radiator becomes warmer, it emits light of shorter wavelengths.
The temperature, and electromagnetic radiation has a relationship where blackbody radiator becomes warmer, it emits light of shorter wavelengths.
What is radiation?radiation can be regarded as the process of heat dissipation without contact with a body.
Therefore , temperature, and electromagnetic radiation of a black body works in the sense that
blackbody radiator becomes warmer during emissions.
learn more about radiation at;
https://brainly.com/question/25110079
#SPJ2
If an Isotope has a Half-life of minutes. How many Half-life's have occurred after 24 minutes?
Answer:12
Explanation:
“You can’t get more energy from a machine than the amount of energy you put into it,” is one way of stating the law of conservation of _____. A. work B. friction C. energy D. power
Answer:
Energy
Explanation:
One ways of stating the law of conservation of energy is that "you cannot get more energy from a machine than the amount of energy you put into it".
The law of conservation of energy states that in a system, energy is neither created nor destroyed but transformed from one form to another.
The energy in a system does not increase based on the premise of this law.
The efficiency of a machine can reduce but the energy is always conserved. This is because energy is transformed to other forms.What is the frequency of a mechanical wave that has a velocity of 1.70 m/s and a wavelength of 12.05 m? (3 decimal places)
Answer:
0.141Hz
Explanation:
Given parameters:
Velocity of the wave = 1.7m/s
Wavelength = 12.05m
Unknown:
Frequency of the wave = ?
Solution;
To solve this problem, we use the wave velocity equation which is expressed below;
V = F ∧
V is the velocity
F is the frequency
∧ is the wavelength
Now insert the parameters and solve;
1.7 = F x 12.05
F = 0.141Hz
What is the main idea of the paragraph in one sentence?
Answer:
The main idea is hoemany thing can turn into amazing and great things
Explanation:
Answer:
The main idea for this passage us to tell you about and space ship and how fast it can go and about the physics
whats ur funniest thing u have ever done in ur life mine was me sending a picture of me and my friend at the beach to my principle
A 1,200 kg car initially traveling at 20 meters/second increases its speed to 28 meters/second. How much work
did the car's engine have to do to cause this change?
A. 38,400 Joules
B. 230,400 Joules
C. 240,000 Joules
D. 470,400 Joules
B
Explanation:
I not sure try to solve I am sorry
Is the amount of friction greater between rough surfaces or smooth surfaces? Why?
Answer:
Rough surfaces have more microscopic hills and valleys than smooth surfaces do. So, the rougher the surface is, the greater the friction is.
On a distant planet, the GPE of a 65 kg astronaut is 11,115 j when they are on a 46 m tall cliff. What is the acceleration due to gravity on this planet
Answer:Learn what gravitational potential energy means and how to calculate it. ... a pulley and rope, so the force due to lifting the box and the force due to gravity, ... would be used by an elevator lifting a 75 kg person through a height of 50 m if the ... When you are close to a planet you are effectively bound to the planet by gravity ..
Explanation:
What is the wavelength of light waves if their frequency is 5.0x1014 Hz and the speed of light 3 x
108 m/s?
A. 0.60 m
B. 6.0 mm
C. 0.060 mm
D. 0.60 um
Answer:
D. 0.60 um
Explanation:
Given the following data;
Frequency = 5.0x10^14 Hz
Speed = 3 x 10^8 m/s
To find the wavelength;
Wavelength = speed/frequency
Substituting into the equation, we have
Wavelength = 3 x 10^8/5.0x10^14
Wavelength = 6 × 10^7m
But 1 meter (m) = 1000000 micrometer (um)
6 × 10^7 meter = 0.6 micrometer.
Potential difference must be measured in parallel within a circuit, using a device called a voltmeter
Answer:
This is true
Explanation:
This is true because in other To measure the potential difference that is across a circuit, we have to place the device called the voltmeter to be in parallel withe the circuit, so as to get a measurement of the difference in energy from one side of the circuit to the other side. We can also refer to the Potential difference as the voltage and it is measured in volts using a voltmeter
How could you determine the injuries or ill person in a secondary assessment?
Answer:
just in internet tho
Signs look, listen, feel and smell for any signs of injury such as swelling, deformity, bleeding, discolouration or any unusual smells. When checking them you should always compare the injured side of the body with the uninjured side. Are they able to perform normal functions such as standing or moving their limbs
Secondary assessments are used in order to determine the injury, how the injury occurred, how severe the injury is, and to eliminate further injury.
Glad to help!
Yusuf is moving at a speed of 1.4 m/s? and has a mass of 71 kg. How much kinetic energy does he have?
Formula for kinetic energy:
K = ½mv²
Given:
v = 1.4 m/s
m = 71 kg
K = ½ · 71.0 kg · (1.4 m/s)²
K = 35.5 kg · 1.96 m²/s²
K = 69.58 J
which are different forms of energy.
please guys give me fast answer
chemical, sound, radiant, electric???
A car can accelerate from rest to 28 m/s and travels 280meters. How long does this acceleration take?
Answer:
[tex]a=1.4m/s^2[/tex]
Explanation:
From the question we are told that
Velocity v=28m/s
Distance d=280
Generally the Newtons equation for motion is mathematically given as
Acceleration
[tex]v^2=2as[/tex]
[tex]a=\frac{V^2}{2s}[/tex]
[tex]a=\frac{28^2}{2*280}[/tex]
[tex]a=1.4m/s^2[/tex]
Can something stay at one point and still be in motion? Why or Why Not?
Answer:
Yes
Explanation:
It is possible because a stone on the ground is at rest with respect to earth but at the same time earth is moving around the sun. That means everything on earth is moving so with respect to sun the stone is also moving. That is how the stone is in rest also and is in motion also.
help me please pleasee
Answer:18/2
Explanation:
its half
A train car of mass 16,500 kg moves along the railroad track with a constant speed of 14 m/s. What is the momentum of the car?
Explanation:
Here,
Mass=16,500kg.
speed=14 m/s.
we know that,
[tex]\tt{ p=m×v }[/tex] ⠀
where,
p=momentum
m=mass
v=velocity
according to the question,
[tex]\tt{ momentum =mass×velocity }[/tex] ⠀
[tex]\tt{ 16500×14 }[/tex] ⠀
[tex]\tt{ 231000~kg.m/s }[/tex] ⠀
so,
velocity of the car is 231000kg.m/s
GIVING BRAINLIEST FIVE STARS AND HEART!
Hello help me please! (*18* Points!) How can the potential energy of a bicycle stopped at the top of a hill be changed into kinetic energy?
Answer:
A bicycle on the top of the hill has the highest potential energy, and when the bike goes down, it transfers to kinetic because it is moving
Explanation:
yeah
Explain in detail how educational institutions and personal ideology affect the influence of contemporary psychological
perspectives.
Answer:
Educational institutions can influence what psychological perspectives are taught, studied, and researched. Take, for example, behaviorism. Before the cognitive perspective re-emerged, behaviorism was the dominant perspective being taught in most universities. Personal ideology can also affect which perspective a psychologist supports, the course of research a psychologist undertakes, and also a psychologist's perception and interpretation of research findings. For example, during the dominance of behaviorism, psychologists were discouraged from studying cognitive processes. As a result, much of the research conducted had a behaviorist slant to it.
Explanation:
A toy plane with a mass of 20 kg is flying at 10 m/s. What is its kinetic energy?
A. 1 000 J
B. 200 J
C.2 000 J
D. Cannot be determined
a car has a mass of 1000kg and accelerates at 2 meters per second per second. what is the magnitude of the net force exerted on the car.
Answer:
2000N
Explanation:
Given parameters:
Mass of the car = 1000kg
Acceleration = 2m/s²
Unknown:
The net force exerted on the car = ?
Solution:
From newtons second law of motion;
F = mxa
F is the net force
m is the mass
a is the acceleration
F = 1000 x 2 = 2000N
True or False: TV waves have a shorter wavelength than microwave rays
Answer:
I think true..... :))))))))))