Answer:
because the rod takes electrons from the fur when rubbed across it
Which of the following best describes how nuclear decay rates can be altered?
A. Extreme temperature can alter nuclear decay rates.
B. Environmental conditions do not change the rate of decay for an isotope. Half-life is consistent over time.
C. High pressure can alter nuclear decay rates.
D. A large surface area can alter nuclear decay rates.
When physical activity is a set plan or program for all ages, usually performed by a group through a local recreational unit, it is called:
a
highly competitive.
b
planned exercise program.
c
sports activity.
d
self-directed.
Answer:
C. Sports activity
Explanation:
A sport activity is a form of competitive physical activity in forms of games. They are normally organized for individuals to participate with the aim of improving physical abilities and skills, bring enjoyment to participants and act as a form of entertainment.
1. What happened to the force of friction when you increased the
weight on the cart?
Choose the polar molecule.
A. C
B. CH4
C. H20
D. F2
Answer : H20
Explanation:
When will the human population stop growing?
A cricket can travel approximately 8 m/s. How many meters could a cricket travel in 75
s?
Answer:
Your answer will be 600meters
How can you tell is energy has been transferred or transformed
Answer:
In mY Knowledge
Energy transfer is the movement of energy from one location to another. Energy transformation is when energy changes from one type to another. While energy can be transferred or transformed, the total energy always remains the same.
Hope iT HeLps :D
Answer:
You can tell if energy has been transferred when something works when you put a body of energy in it. For example, you'll know when energy is transferred if you plug a lamp cord into an electric socket and the lamp turns on. Energy is being transferred from the socket to the lamp.
You can tell when energy is being transformed when it changes from one energy to another. You can know when energy is being transformed when you turn on a stove. Chemical energy transforms into electric energy.
I hope that helps!
If it is correct, may I be brainliest?
What is the elevation at point A?
Answer:
i think that says 4800
its the same as the number at the bottom
6. A rock is dropped from a bridge. As it falls, its acceleration is 10. What is its speed when it hits the water after falling for 8.17 s?
*Round your answer to the nearest hundredth if necessary.
mn
Answer:
800
Explanation:
bc if you times by ten
how do mass and distance affect the force of gravity between on objects
The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them. This means that the force of gravity increases with mass, but decreases with increasing distance between objects.
What is specific heat capacity
Answer:
Heat capacity or thermal capacity is a physical property of matter, defined as the amount of heat to be supplied to a given mass of a material to produce a unit change in its temperature. The SI unit of heat capacity is joule per kelvin. Heat capacity is an extensive property
Question 3 (1 point)
The nucleus occupies most of the space of an atom
True
O False
Answer:
the correct answer is false
How much work is done by a 120 N force in 5 meters? *
Answer:
w=f×d
=120×5
=600 j...........
A ball rolls across the ground and slows to a stop.
Does gravity do work in stopping the ball?
Explain.
(Drawing a picture will help.)
gravity does help the ball since gravity pulls down objects, it causes more friction on the ball therefore causing the ball to slow down faster.
A substance that is composed of two or more
atoms that are chemically bonded together is
called an)
compound
mixture
element
matter
Explanation:
COMPOUND
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Which stars are the youngest?
A) Supergiant
B) White dwarf
C) Blue star
D) Red Dwarfs
You and your friends are playing tug of war. Your team pulls with a force of 55 N, to the right. The other team pulls with a force of 65 N to the left. What is the net force on the rope
Answer:10 N
Explanation:
Subtract them and u will see it will be 10n so the net force will be 10 n why you should subtract them is because
They both are different amounts
Different forced of strength
Different N numbers
Think of it like the is an unequal amount of student so one side has 2 students and the other side has 4 students
Compare the speed that light waves travel in air to the speed that sound waves travel in the air. How many times faster do light waves travel in air in comparison to sound waves in air?
Answer:
As a rule sound travels slowest through gases, faster through liquids, and fastest through solids. The speed of light as it travels through air and space is much faster than that of sound; it travels at 300 million meters per second or 273,400 miles per hour. ... Speed of light in glass = 200 million m/s or 182,300 mph.
Explanation:
Almost always sound travels slowest via gases, faster via beverages, and fastest via solids. The velocity of light because it travels via air and area is a great deal quicker than that of sound; it travels at 300 million meters consistent with 2d or 273,400 miles in step with hour.
The pace of light in glass = 2 hundred million m/s or 182, 300 mph.
How are light waves and sound waves extraordinary?Mild waves are electromagnetic waves whilst sound waves are mechanical waves. Mild waves are transverse even as sound waves are longitudinal. Light waves can tour in a vacuum. Sound waves require a material medium to journey, and as a result, can not travel in a vacuum.
Nothing can travel faster than light except for sound. This is the declaration of a few US physicists, who say they've designed an unusual waveguide to make the sound move at “superluminal” speeds (Appl. Phys.
In 2015, a team of Scottish scientists announced that they had found a way to gradual the rate of mild. By sending photons via a unique mask, the researchers altered their shape. In this malformed kingdom, these infinitesimal particles of light traveled slower than normal photons.
Learn more about the speed and sound wave of light waves here: https://brainly.com/question/2142871
#SPJ2
According to the rock cycle, when liquid magma cools into a solid, what is formed?
Answer:
Similarly, liquid magma also turns into a solid — a rock — when it is cooled. Any rock that forms from the cooling of magma is an igneous rock. Magma that cools quickly forms one kind of igneous rock, and magma that cools slowly forms another kind. ... The kind of rock formed in this way is called intrusive igneous rock.
Explanation:
Answer: Igneous rock.
Explanation:
The kind of rock formed in this way is called intrusive igneous rock.
A woman does 236 J of work
dragging her trash can 24.4 m to
the curb, using a force of 18.9 N.
At what angle was her force
directed?
(Unit = degrees)
Answer:
The woman's force was directed 59.22⁰ to the horizontal.
Explanation:
Given;
work done by the woman, W = 236 J
distance through the load was moved, d = 24.4 m
applied force, F = 18.9 N
inclination of the force, = θ
The work done by the woman is calculated as;
W = Fdcosθ
[tex]cos \ \theta = \frac{W}{Fd} \\\\cos \ \theta = \frac{236 }{18.9 \times 24.4} \\\\cos \ \theta = 0.5118\\\\\theta = cos^{-1} ( 0.5118)\\\\\theta =59.22^0[/tex]
Therefore, the woman's force was directed 59.22⁰ to the horizontal.
Answer:
59.22⁰
Explanation:
A trolley of 20kg move 60 gm.Find out the work done by the trolley.
Answer:
11760
Explanation:
m= 20kg
d= 60 m
work done = force .distance= 20*9.8*60= 11760Nm
Identify the type of reaction (combustion, synthesis, decomposition, single replacement, or double replacement) this equation represents.
CH4 + O2 CO2 + H2O
Answer:
Combustion
Explanation:
A captain of a fishing boat notices that during a certain time each year high tides are higher and low tides are lower. Which conclusion could the captain accurately draw?
Answer:
The Moon is at the closest part of its orbit around Earth; the Sun and the Moon form a straight line with Earth.
Explanation:
The conclusion the captain could draw accurately is that;
The moon is probably at the closest part of its orbit moving round the earth. In addition, that the sun and the moon have formed a straight line with earth. This is due to the fact that high tides are higher and low tides are lower at a particular time each year.
49. A 6.1-kg bowling ball is liſted 2.1 m to a shell. Find
the increase in the ball-Farth system's energy.
Answer:
125.5J
Explanation:
Given parameters:
Mass of the bowling ball = 6.1kg
Height of lifting = 2.1m
Unknown:
Increase in the ball energy = ?
Solution:
The ball has changed position by moving it from one point to another. So, it has acquired more potential energy.
Potential energy = mgh
m is the mass
g is the gravity
h is the height
Now insert the given parameters and solve;
Potential energy = 6.1 x 9.8 x 2.1 = 125.5J
what is meaning of saniya?
Answer:
“brilliant, radiant, splendid”.
Explanation:
A bat emits a pulse of sound of wavelength 0.0085 m. Calculate the frequency of the sound.
Answer:
v = 4.0 10⁴ Hz
Explanation:
The bat emits sound in the air, so we can use the speed of sound in air
v = 344 m / s
also the expression that relates the wavelength and frequency with the speed of the wave
v = λ f
f = v / λ
let's calculate
v = 344/0.0085
v = 4.0 10⁴ Hz
HI thts way tooo much to answer but ye...d;
apparent brightness depends on which two properties?i’ll give brainlist?:)
Answer:
D
Explanation:
I just did it on a p e x
Answer:
D
Explanation:
10) If you shine blue and red light on a white object it appears to be violet. * 1 point
True
Or
False
Answer:true
Explanation:
A child approaches a stop sign and applies the brakes to slow to a stop. If the bicycle and child were originally traveling at 9.00 m/s and the breaks cause a deceleration of magnitude 1.20 m/s^2, how long will it take the child to stop?
Answer:
7.5secs
Explanation:
Using the equation of motion
v = u + at
v is the final velocity = 0m/s
u is the initial velocity = 9m/s
a is the deceleration = -1.2m/s²
t is the required time
Substitute;
0 = 9 + 1.2(t)
-9 = -1.2t
t = -9/-1.2
t = 7.5secs
hence it takes the child 7.5secs to stop
If the work done on a object is 100 J and it comes to a rest on a surface with a mass of 10
kg and a SHC of 1000 J/kg-C calculate the change in temperature.