Answer:
D
Explanation:
heat is an energy that transfers from a hot body to cold body
D. Heat
What is heat?Heat is the transfer of kinetic energy from one medium or object to another, or from an energy source to a medium or object.
Such energy transfer can occur in three ways: radiation, conduction, and convection.
As heat is a form of energy, and therefore the SI unit of heat is also joules (J) which are defined as the amount of energy needed to raise the temperature of a given mass by one degree.
Heat is the transfer of energy from a warmer object to a cooler object.
For example, a lighted match (higher temperature object) will transfer heat to a large pan filled with lukewarm water (lower temperature object).
Therefore,
The term describes the transfer of energy from a hot object to a cooler one is Heat.
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Free falling objects accelerate at 9.8 m/s because the force of
acts on them.
speed
gravity
magnitude
motion
A scientist discovers a fossil of an animal and places it in the fossil record. The organism’s bones are similar to the bones of animal T, which appears earlier in the fossil record. Which conclusion is most reasonable?(1 point)
The fossils came from the same organism.
The fossils are from an ancestor of animal T.
The fossils are from animals that lived at the same time.
The fossils are from a descendant of animal T.
DO NOT PROVIDE FALL ANSWERS/ NO ANSWER
A. The fossils cam from the same organism
Hope this helps!
The fossils came from the same organism. This conclusion is most reasonable.
What is fossil?A fossil is an item that has survived in the Earth's crust as a remnant, impression, or trace of an extinct animal or plant. The main repository for knowledge regarding the evolution of life on Earth is the complex of information preserved in fossils found all across the world.
Fossils of dinosaurs discovered in Alberta, Canada. Only a small percentage of extinct species have been preserved as fossils, and often only those with a sturdy skeleton are capable of doing so. A calcareous skeleton or shell is present in the majority of major groups of invertebrate creatures (e.g., corals, mollusks, brachiopods, bryozoans). Other types have silicon dioxide or calcium phosphate shells (both of which are found in the bones of vertebrates).
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Find the y-component of this
vector:
0.250 m
18.40
Remember, angles are measured from
the +x axis.
y-component (m)
Enter
Answer:
-0.0789 m
Explanation:
Recall that the y-component comes associated with the sin(18.4) through the following trigonometric relationship:
y = 0.250 sin(-18.4) ≈ -0.0789 m
Notice it is negative since it is below the x-axis.
A physicist does 100 joules of work on a simple machine that raise a box of bioks through a heigjt of 0.2metres. if the efficiency of the machine is 60%, how much work is converted to thermal energy?
Answer:
the work converted to thermal energy is 40 J.
Explanation:
Given;
work done by the physicist,w = 100 J
height through which the book is raised, h = 0.2 m
efficiency of machine = 60% = 0.6
The useful work done by the machine is calculated as;
useful work = 0.6 x 100 = 60 J
The wasted energy = 100 J - 60 J
The wasted energy = 40 J
The wasted energy by the machine is possibly converted to thermal energy by the frictional part of the machine.
Therefore, the work converted to thermal energy is 40 J.
Ronaldo runs across a soccer field, moving 10 meters north, then 8 meters west, then 4 meters south. His
displacement would be:
Answer:
wha is this .....................? same confusion
Which of the following bounces light in another direction?
a) Sunglasses
b) lamp
c) mirror
d) prism
Answer:
I do believe the answer is D. prism
Answer:
Explanation:
either all of the above or D <3
Why does an iceberg have more HEAT than a cup of coffee.
Explanation:
Although the iceberg has less internal energy per mass, its enormously greater mass gives it a greater total energy than that in the small cup of coffee
Answer:
The hot coffee has a higher temperature, but not a greater internal energy. Although the iceberg has less internal energy per mass, its enormously greater mass gives it a greater total energy than that in the small cup of coffee.
Explanation:
Charges may be transferred by:
A) induction
B) insulation
C) reduction
D) conduction
Answer:
D) conduction
Explanation:
describe tension force (FT) in your own words
Answer In the field of physics, tension is called the force that is exerted by the action of a cable, rope, chain or other similar solid object. ... Since tension is a magnitude of force, it is measured in newtons and is always measured in a direction parallel to the chord on which it is applied.
Explanation:
Kara drops a rock from the edge of a cliff and it takes 7.00 s for the rock to reach the ground. What is the cliff’s height?
Answer:
h = 204.1 m
Explanation:
Given that,
Time taken to reach the ground, t = 7 s
We need to find the height of the cliff. We can find it using second equation of kinematics as follows :
[tex]h=ut+\dfrac{1}{2}at^2[/tex]
Here,
u = 0 (at rest initially)
a = g
So,
[tex]h=\dfrac{1}{2}gt^2\\\\h=\dfrac{1}{2}\times 9.8\times 7^2\\\\h=204.1\ m[/tex]
So, the cliff's height is 204.1 m.
A car is left overnight in a parking lot. What is its instantaneous speed at 12:01 a.m.?
Answer:
0 mph
Explanation:
Answer:
0 mph
Explanation:
How do you calculate the average velocity of mercury as it orbits the sun?
Answer:Hope this helps!!!!!
Explanation:
People are fascinated with high-speed travel. A Boeing 747 flies at about 550 miles per hour. The Concorde Supersonic Transport flew over twice as fast at about 1350 miles per hour. That is impressively fast, but consider the speeds that we passengers on planet Earth always travel. The circumference of the Earth at the equator is 24900 miles and the residents of the tropic areas travel that distance every 24 hours. They are traveling over a thousand miles an hour. At 38° latitude we are traveling about 820 miles per hour. That is quite impressive but it pales in comparison with the orbital speed of the Earth, The average distance of the Earth from sun is 93.5 million miles. This means that in 365.25 days the Earth travels 587.5 million miles. This works out to about 67 thousand miles per hour. This is the speed we travel 24 hours a day, 365.25 days a year.
The orbital velocity is 2πR/T where R is the average radius of the orbit and T is the length of the year. The orbital velocity of a planet relative to that of Earth's is then the relative radius divided by the relative length of the year.
You move a 25 N object in 10s with 100 W of power.
How far did you move the object?
Answer:
Distance = 40 meters.
Explanation:
Given the following data;
Force = 25N
Time = 10 seconds
Power = 100 Watt
To find the distance;
First of all, we would determine the work done;
Workdone = power * time
Workdone = 100 * 10
Workdone = 1000 Nm
Next, we use the following formula to find the distance;
Workdone = force * distance
1000 = 25 * distance
Distance = 1000/25
Distance = 40 meters.
5. A runner of mass 60 kg accelerates at 2.0 m/s2 at the start of a
race. Calculate the force provided from her legs.
Answer:
F = 120 N
Explanation:
Given that,
The mass of a runner, m = 60 kg
Acceleration of the runner, a = 2 m/s²
We need to find the force provided from her legs. The formula for force is given by :
F = ma
Substitute all the values,
F = 60 kg × 2 m/s²
= 120 N
So, the required force is equal to 120 N.
Given:
Mass,
m = 60 kgAcceleration,
a = 2.0 m/s²As we know that,
→ [tex]Force = Mass\times Acceleration[/tex]
or,
→ [tex]F = ma[/tex]
then,
[tex]= 60\times 2.0[/tex]
[tex]= 120\ N[/tex]
Thus the above answer is right.
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A skydiver of mass mmm jumps from a hot air balloon and falls a distance ddd before reaching a terminal velocity of magnitude vvv. Assume that the magnitude of the acceleration due to gravity is g.
Required:
Find the power Pd supplied by the drag force after the skydiver has reached terminal velocity v. (in same terms)
Answer:
Explanation:
When the object falling attains terminal velocity , net force on it becomes zero. That means drag force becomes equal and opposite to its weight.
So drag force = mg
where m is mass of falling body and g is acceleration due to gravity .
The drag force is constant . It is doing work against the weight of falling body . Object is falling v m /s . That means drag force is doing work per second as follows
Work done per second = force x displacement per second
= mg x v
So
Power of drag force = mgv.
Pd = mgv.
2) Describe the qualities and the location of supergiant stars based on the H-R diagram.
Answer:
55
Explanation:
A beam is pivoted at one end, as shown.
The beam weighs 6.0 N and its weight acts at a point X, 40 cm from the pivot.
A force of 4.0 N is applied to the beam causing it to balance horizontally.
In which direction and where is the 4.0 N force applied?
A
downwards at 20 cm to the left of X
B
downwards at 20 cm to the right of X
Cupwards at 20 cm to the left of X
D upwards at 20 cm to the right of X
4. A 3000 kg plane has an acceleration of 12 m/s/s on take off. What net force is exerted on the plane?
Answer: 36000 N
Explanation: I REALLY HOPE THIS HELPS I'M KINDA NEW AT THIS:] :]
Name three ways temperature can vary:
Answer:
Degree, Location and Time?
Explanation:
Answer:
Age. One of the most elementary factors that influence normal body temperature is age
Time of The Day. ...
Exercise or Physical Exertion. ...
Stress. ...
Meals. ...
Drugs and Smoking.
Explanation:
A well acts as a closed pipe. When
wind blows across the top, it
creates a fundamental frequency of
30.6 Hz. How deep is the well?
(Speed of sound = 343 m/s)
(Unit = m)
Answer:2.80 m
Explanation: you would divide 343 by 4 times 30.6
Answer:
2.80
Explanation:
Acellus
PLEASE HELP!
A person is standing on ice. He throws a snowball with a force of 4 N to the right, while the snowball pushes the
person with a force of 4 N to the left. What is the net force on the person?
A) 4 N, left
B) 8N
Answer:
A) 4n
Explanation:
He throws a snowball with a force of 4 N to the right, while the snowball pushes the person with a force of 4 N to the left. The given scenario is balanced because the same amount of force is acting in both direction.
a boy throws a small stone into a pond. waves spread out from where the stone hits the water and travel to the side of the pond. the boy notices that eight waves reach the side of the pond in a time of 5.0 s. what is the frequency of the waves
Answer: 1.6Hz
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17. How long does it take a giraffe running at a speed of 33 m/s to run 200 meters !
Answer:
6600sec
Explanation:
T=sv
T=200m*33m/s
T=6600sec
How do I solve for the maximum height of someone who jumps straight up leaving the ground at 6.0 m/s.
Answer: 3.0 m/s
Explanation:
please help me!!!!!!. what difference between gravitational and gravity
constellation *
a.) the hunter
b.) Pole Star
c.) little bear
d.) pattern of stars
e.) nearest star
Answer:
D
Explanation:
a group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure.
I hope this helps a bit.
Continental drift is______?
A:The movement of large land areas across earth's surface
B:The current that pushed Wegners hot air balloon
C:The movement of animals from Africa and South America
Answer is:
A:The movement of large land areas across earth's surface
When light strikes an object, what happens to some of the light?
A. Some of the light turns into sound.
B. Some of the light becomes brighter.
C. Some of the light is reflected.
D. Some of the light becomes less bright
Answer:
The light wave could be reflected by the object
What are some indicators of energy transformations?
Explanation:
Contact, vision, sound, flavor, and smell are all markers of energy transformations. The most basic example would be when we notice something has begun to pass through vision. Whenever an entity accelerates or slows down, energy is constantly transformed.
At which position is the LOWEST potential energy?