What is the evidence that an asteroid collision has happened before?
Answer:
The first clue that an asteroid had struck earth at around the same time as the mass extinction was the amount of iridium around the K-T boundary. Another clue was that they found that most animals that lived in the cretaceous died when the asteroid crashed and they found bones of animals from the cretaceous.
4. Premature wrinkling due to overexposure to the Sun, what am I?
Premature Aging
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Displacement a combination of
Answer:
Displacement a combination of distance
Explanation:
I'm not sure eh
How do we know when an object is in static or dynamic equilibrium?
Answer:
First Condition of Equilibrium
Explanation:
This means that both the net force and the net torque on the object must be zero. The condition Fnet=0 F net = 0 must be true for both static equilibrium, where the object's velocity is zero, and dynamic equilibrium, where the object is moving at a constant velocity.The sum of the forces on it in each direction is zero. The sum of the torques on it in each direction is zero. Its linear momentum is zero.Could someone pls help at #9?
Answer:
Substance 3 is the answer
What name is given to the process that occurs when light passes from air to water?
A radiation
B reaction
C reflection
D refraction
Answer:
Refraction
Explanation:
Being overweight or obese increases the risk of:
A. Diabetes
B. Heart disease
C. Stroke
D. All of the above.
theanswer is b.heart disease
On which factor does the inertia of a body depend?
Answer:
The moment of inertia depends on the following factors, The density of the material. Shape and size of the body. Axis of rotation (distribution of mass relative to the axis)
Electric fields are often associated with what other kind of field?
a. Magnetic Fields
b. Particle Fields
c. Nuclear Fields
d. Corn Fields
NEED HELP VERY FAST
Answer:
The answer is A :)
Explanation:
(I'm good at this kind of stuff but sometimes I get things wrong. We all do)
I believe your answer is A though
Feel free to correct me if i'm wrong :)
Why is the sky blue?
Why does the moon appear in the daytime?
How much does the sky weigh?
How do airplanes stay in the air?
Why is water wet?
Why don't birds get electrocuted when they land on an electric wire?
Answer:
the sky is blue because of reflection of blue light of sea and ocean.
the moon appear in the daytime because light of sun is brighter than of moon
airplanes stay in the air by maintaining balance in air and gravity.
birds did not get electrocuted when they land on an electric wire because there body is non conductor.
What can be found in every skeletal muscle?
A.
nerves, bones, cartilage, and connective tissue
B.
tendons, cartilage, nerves, and blood vessels
C.
muscle fibers, nerves, connective tissue, and blood vessels
D.
tendons, nerves, blood vessels, and bones
Please select the best answer from the choices provided.
A
B
C
D
Answer:
Its C
Thank me later
Now bye
Two ropes are identical. A wave traveling through the first rope has a frequency of 1.5 hertz and a wavelength of 6 meters. What is the frequency of a wave in the second rope if its wavelength is 2 meters?(1 point)
3 hertz
4.5 hertz
9 hertz
1.5 hertz
the answer is b 4.5 hertz
WILL MARK BRAINLIEST
When an arrow hits its target, what type of energy will it have?
A. gravitational
B. elastic
C. mechanical
D. chemical
Answer
Mehanical energy
Please. Mark brainlist
I am not very much sure but I will give a small explanation here
A bow and arrow possesses mechanical energy. When the arrow is drawn it has potential energy and when it is released it produces a force to propel the arrow towards the aimed target, therefore giving the arrow kinetic energy. When you combine both energies it creates mechanical energy
Leigh Ann is learning about the differences between inherited traits and learned behaviors in organisms. For example, she knows that being able to read is learned while having straight or curly hair is inherited. How does a person inherit a trait such as hair texture?
A. Through the storage of extra fat during birth
B. Through DNA that is passed from parents to offspring
C. Through the breakdown of different proteins during birth
D. Through different viruses that are passed from parents to offspring
Answer:it the letter b I was just finished with this test
Explanation:
Which three characteristics describe the energy of a wave? (2 points)
a
Frequency, the crest, and the trough
b
Wavelength, amplitude, and frequency
c
Speed, amplitude, and medium
d
Frequency, wavelength, and medium
A bungee jumper is attached to a bungee cord, which acts like a spring. When the bungee jumper jumps, he oscillates in periodic motion. If losses due to friction and air resistance can be ignored, what types of energy conversions are involved in this system? A. Energy is converted between gravitational potential and elastic potential energy B. Energy is converted between kinetic and gravitational potential energy C. Energy is converted between gravitational potential, elastic potential, and kinetic energy, D. Energy is converted between kinetic and elastic potential energy.
help please!!!
help me pls i really need it...
Answer:
directly proportional
Explanation:
.........,.............
please help this is so hard and frustrating i will name brainliest
Answer:
1.308104*10^-8 N (1.31*10^-8 N when rounded)
Explanation:
The mathematical formula for gravitational force is F = G Mm /r^2 where G is the gravitational constant which is measured 6.674 *10^ − 11 N (m/kg) ^2.
Since both objects, M and m, have masses of 70kg and the distance r is 5 meters, then we can plug these values into the formula:
F=GMm/r^2
F=(6.674*10^-11)(70)(70)/(5^2)
F=(6.674*10^-11)(4900)/25
F=(3.27026*10^-7)/25
F=1.308104*10^-8
So the gravitational force of attraction between the two objects is 1.308104*10^-8 N.
The diagram below shows a wave. The feature of the wave are labeled A, B, C, and D. Which label identifies the wavelength?
According to the given diagram, the c identifies the wavelength of the curve. Hence, option C is correct.
What is wavelength?In order to characterize waveform signals that are transmitted across wires or into space, the term "wavelength" is used to refer to the separation between two identical positions (adjacent crests) in succeeding cycles. Typically, this length in wireless systems is measured in meters (m), centimeters (cm), or millimeters (mm) (mm). When describing the wavelength of infrared (IR), visible light (UV), and gamma radiation, units of 10-9 nanometers (nm) or angstroms (10-10 m) are more usually used.
The relationship between frequency and wavelength is inverse, with frequency being the number of wave cycles per second. A signal's wavelength shortens as its frequency rises, or we may say that the relationship between wavelength and refractive index is inverse.
To get more information about wavelength :
https://brainly.com/question/13533093
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5. The speed of a car is 15m/s. Its speed in km/h is *
Answer:
54 Km per hour..
Explanation:
Multiply the speed value by 3.6
What is the power generated by a 3.7 V cell phone battery that provides 2.0 A of current?
Answer:
7.4 watt
Explanation:
Power= V× I
= 3.7×2.0= 7.40 watt
Three 3-ohm resistors are connected in parallel. The total resistance for the resistors is
Explanation:
I think the total resistance of the resistors is 1 ohm . it is also known as equivalent resistance.
hope it helps.
please help anyone i will mark brainliest
How do two ions of the same element differ?
Answer:
In the electrons
Explanation:
The charge of ions of an element is determined by the amount of negative charged electrons are present. The protons and neutrons in the nucleus do not change.
Answer:
it is possible to use two icons in css content one below content 10px;color #99999
You volunteer to travel to a newly discovered planet about 30 light years from earth. At what speed do you need to travel to reach the planet in 6 years?
Anita rides a bicycle to market 60km from her house in 3.5 hours. What is Anita’s
speed?
Which one of these exercises gets your heart pumping? *
O Sitting in a chair
O Sleeping
O Swimming
O None of the Above
Answer:
swimming
Explanation:
A skier, starting from rest, slides down an icy frictionless 80o incline whose vertical height is 105 m. How fast are they going when the reach the bottom?
Answer:
nadaáaaaaaaaaaaaaa aaaaaaaaaaaaaaa
Why does it take a long time for the earth to rotate?
24hrs or i full year as in 365 days
Answer:
earth takes a long time to rotate due to the tidal effects the moon has on earth's rotation
Explanation:
I hope this helps!
What is the relationship between Pressure and phg
? ?.
Answer:
P=F/A =mg/A =pvg/A = pgh
Explanation:
pressure equals force per unit area.
force also equals mass ×gravity
mass can also be density ×volume
volume can also be area × height
area would cancel out the area
leaving pgh
