Answer:
Find two boxes just a bit smaller than the other. The long sides of the box should be less than twice as long as the short side of the boxes. The smaller box should fit inside the larger box with about 1 inch in each direction to spare. The boxes can be cut down so that they fit together properly. Leave the flaps on the boxes. Buy a small sheet of Plexiglas (tm) a little bit smaller than the width and length of the top of the box. You will also need four pieces of cardboard to use for reflectors.
Explanation:
What do scientists use to study the patterns and impacts of climate change over time?
A. all of the above
B. tree rings and ice formed thousands of years ago
C. fossilized pollen and tree rings
D. chemical isotopes in foraminifera shells and fossilized pollen
Scientists use the following to study the patterns and impacts of climate change over time :
Tree rings and ice formed thousands of years agoFossilized pollen and tree ringsChemical isotopes in foraminifera shells and fossilized pollenWhat is Climate?
This is defined as the atmospheric condition of a place over a long period of time.
Scientists use physical, chemical and biological methods to study impacts of climate change which makes option A the most appropriate.
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A crate of mass 50kg is pushed along a floor with a force of 20N for a distance of
5m. Calculate the work done.
Answer:
F=50kg
D=5m
W=FD
therefore work done is 250Nm
The work done will be 100 J. It is obtained as the product of the force and displacement.
What is work done?Work done is defined as the product of applied force and the distance through which the body is displaced on which the force is applied.
Work may be zero, positive and negative.it depends on the direction of the body displaced. if the body is displaced in the same direction of the force it will be positive.
The given data in the problem is;
m is the mass of the crate = 50 kg
F is the force of 20 N
d is the distance = 5 m
W is the work done.
[tex]\rm W =F \times d \\\\ \rm W =20 \times 5 \\\\ W= 100 \ J[/tex]
Hence the work done will be 100 J.
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Thermal energy can be converted into motion by which of the following devices?
A.Microwave oven
B.Solar panel
C.Steam engine
D.Electric toaster
Achild is pulling a toy train along the floor by a piece of string.
State one contact force and one non-contact force that acts on the toy
what is the relationship between force and acceleration
The attractive force between two objects that
depends on their masses and the distance
between them is called
Answer:
The answer is gravity
Explanation: Hope this helps:)
please answer correctly and ill give branliest
5) Spinning blades may injure or kill aquatic species.
6) During high tide, the ocean's waters creep up the shore, deepening the water. This happens as a body of water gets closer to one of the two bulges created by the moon's gravitational force
Milan is measuring the density of ethanol. He weighs a bottle three times:
first, empty; then filled with water; then filled with ethanol. Here are his
results:
mass of empty bottle = 30.0g
mass of bottle filled with water = 90.0g
mass of bottle filled with ethanol = = 78.0g
i Calculate the volume of the bottle.
[tex]\\ \tt\hookrightarrow Density=\dfrac{Mass}{Volume}[/tex]
[tex]\\ \tt\hookrightarrow Volume=\dfrac{Mass}{Density}[/tex]
[tex]\\ \tt\hookrightarrow volume=\dfrac{48}{0.789}[/tex]
[tex]\\ \tt\hookrightarrow Volume=68.83cm^3[/tex]
Density of ethanol[tex]=0.789g/cm^3[/tex]
Mass of ethanol[tex]=78-30=48g[/tex]
[tex]Density = \frac{Mass}{Volume} [/tex]
[tex]Volume = \frac{Mass}{Density}[/tex]
[tex]Volume = \frac{48}{0.789}[/tex]
[tex]Volume = 68.83cm³[/tex]
The distance from the Sun where ice and gases become prevalent on a planet's surface relative to liquid water is defined as the ... A. frost line. B. neutrino line. C. liquid line. D. positron line.
The distance from the Sun where ice and gases become prevalent on a planet's surface relative to liquid water is defined as the frost line.
What is frost line
A frost line also known as frost depth or freezing depth, is the depth to which the groundwater in soil is expected to freeze.
It is the distance from the Sun where ice and gases become prevalent on a planet's surface relative to liquid water.
Thus, the distance from the Sun where ice and gases become prevalent on a planet's surface relative to liquid water is defined as the frost line.
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An engineer is designing a runway. She knows that a plane, starting at rest, needs to reach a speed of 180mph at take-off. If the plane can reach this take-off speed in 65.0s, how far will the plane travel before take-off. Assume the plane increases speed steadily.
How far does the plane need to travel during take-off (in given units)?
ft
Could the plane take off on a 10000ft long runway?
Answer:
The plane would need to travel at least [tex]8,\!580\; {\rm ft}[/tex] ([tex]8.58 \times 10^{3}\; {\rm ft}[/tex].)
The [tex]10,\!000\; {\rm ft}[/tex] runway should be sufficient.
Explanation:
Convert unit of the the take-off velocity of this plane to [tex]\rm ft\cdot s^{-1}[/tex]:
[tex]\begin{aligned}v &= 180\; {\rm mph} \\ &= 180\; {\rm mi \cdot hrs^{-1}} \times \frac{1\; {\rm hrs}}{3600\; {\rm s}} \times \frac{5280\; {\rm ft}}{1\; {\rm mi}} \\ &= 264\; {\rm ft \cdot s^{-1}}\end{aligned}[/tex].
Initial velocity of the plane: [tex]u = 0\; {\rm ft \cdot s^{-1}}[/tex].
Take-off velocity of the plane [tex]v =264\; {\rm ft\cdot s^{-1}}[/tex].
Let [tex]x[/tex] denote the distance that the plane travelled along the runway. Since acceleration is constant but unknown, make use of the SUVAT equation [tex]x = ((u + v) / 2) \, t[/tex].
Notice that this equation does not require the value of acceleration. Rather, this equation make use of the fact that the distance travelled (under constant acceleration) is equal to duration [tex]t[/tex] times average velocity [tex](u + v) / 2[/tex].
The distance that the plane need to cover would be:
[tex]\begin{aligned}x &= \left(\frac{u + v}{2}\right)\, t \\ &= \frac{0\; {\rm ft \cdot s^{-1}} + 264\; {\rm ft \cdot s^{-1}}}{2} \times 65.0\; {\rm s} \\ &= 8.58\times 10^{3}\; {\rm ft}\end{aligned}[/tex].
D Calculate the
average speed of a
car that travels 70 km
in 1.5 hours
Answer:
s = 46.67 km/h
Explanation:
s = d/t
s = 70/1.5
What does red shift tell about the movement of a galaxy?
calculate the speed above.
what type of motion is describe on this graph?
graph the paper vs. time.
does your graph for speed vs time match your distance vs time graph how do you know?
What is the momentum of a 12-kg object moving at 5.5 m/s?
Answer: 66 kg m/s
Explanation:
The equation for Momentum is
p=mv
where P is momentum
m is mass
and v is velocity (speed)
Since we have both mass and velocity all we have to do is multiply the mass and velocity to get momentum
12kg * 5.5 m/s = 66 kg m/s
The image when obtained from a concave lens of focal length f is magnified up to n times the size of the object. What is the distance of object from the lens?
[tex] \frac{1}{v} - \frac{1}{u} = \frac{1}{f} [/tex]
[tex] \implies \: \frac{u}{v} - 1 = \frac{u}{f} \: \: \: ......(i)[/tex]
[tex] \text{As} \: m = \frac{v}{u} = n \: \: \: \: \: \: \text{(given)}[/tex]
[tex] \implies \frac{u}{v} = \frac{1}{n} [/tex]
[tex] \text{Substituting the above values in Eq. (i), we get}[/tex]
[tex] \implies [\frac{1}{n} - 1 ] = \frac{u}{f} [/tex]
[tex] \implies \: u = [ \frac{1 - n}{n} ]f[/tex]
Hope This Helps :)!!!You hold a softball in the palm of your hand and toss it up. Draw the diagrams while the ball is still touching your hands.
Please. help me with this question.
Answer:
When you push it hard enough, then force for the Bush is created than the fictional force. So that means that is net force Equus. If Bush minus the fiction force is very Dan zero, so that means that is mass times acceleration. So that's why it starts moving in the direction off the bush Boxee.
Explanation:
what is this math i do not get it pls helppppp
Answer:
where is the problem u need help with
Explanation:
(: pls mark brainliest
Answer: math is an area of knowledge that includes the study of such topics. as numbers and formulas related structures, algebra and geometry also calculus and analysis
Explanation:
If a car is moving +14m/s is to stop within 2 seconds, what must the car's acceleration be?
Acceleration is -7 m/s²
Explanation:
initial velocity (u) = 14 m/s
since it's gonna stop,
final velocity (v) = 0m/s
time taken(t) = 2 seconds
now,
a = (v-u)/t
or, a = (0-14)/2
or, a = -14/2
a = -7m/s²
A person throws a ball with a force of 140 N that accelerates at 15 m/s? What is the mass of the
ball?
Newton's 2nd law
[tex]\tt \sum F=m.a[/tex]
input the value:
[tex]\tt m=\dfrac{\Sum F}{a}=\dfrac{140~N}{15~m/s^2}=9.3~kg[/tex]
The mass of the ball, that person throws, is 9.33 kg.
What is force?The definition of force in physics is: The push or pull on a massed object changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.
The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.
A spring balance can be used to calculate the Force. Newton is the SI unit of force.
Force applied on the ball = 140 N.
Acceleration of the ball = 15 m/s².
According to Newton's 2nd law of motion:
Force = mass × acceleration
Mass = force ÷ acceleration
= 140 N ÷ 15 m/s²
= 9.33 kg.
Hence, the mass of the ball is 9.33 kg.
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A person feels hungry even though he does not do any work
Answer:
yes because you need energy even for eye blinking
Hummingbirds may seem fragile, but their wings are capable of sustaining very large forces and accelerations. (Figure 1) shows data for the vertical position of the wing tip of a rufous hummingbird.
Acceleration is mathematically defined as; ΔV/t.
What is acceleration?Acceleration is defined as the ratio of the change in velocity to time. It is defined as the extent to which the velocity changes within a given time interval.
The question is incomplete so we can not arrive at the final answer. However, acceleration is mathematically defined as; ΔV/t.
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An equal amount of a gas is held in two identical containers. The temperature of container 1 is 15°C and the temperature of container 2 is 30°C. In which container will the pressure be lowest? (Assume there is nothing else inside the containers.)
Answer:
Container 1
Explanation:
The reason why there will be less pressure in container 1 is that it's colder than container 2. You must have learned right, that a colder thing has its molecules less moving, and they don't expand, instead they actually decrease in volume? In the same way, it's applied to gas also. So that's why, because container 1 has 15C temperature, which is half less than container 2's 30C, that's why, container 1 has less pressure than Container 2.
So hence, container 1 has less pressure than container 2 because of its a lower temperature, which doesn't make the molecules expand, and move around that much.
THANKS!
What does the length of a velocity vector arrow represent
Which line shows the object is moving at its fastest rate of speed?
Answer:
Line C
Explanation:
Hi there!
Speed is equal to Distance divided by Time:
speed = distance / time
Notice how distance is the dependent value on the graph, lying on the y-axis, and time is the independent value on the graph, lying on the x-axis.
The slope of a line is equal to Rise divided by Run:
slope = rise / run
"Rise" means the number of units the line travels up in the y-direction and "run" means the number of units the line travels to the right in the x-direction.
This makes the "rise" of the line equivalent to the distance, and the "run" of the line equivalent to time.
Therefore, speed = slope.
To find the line that shows the object moving at its fastest speed, we must find the line with the greatest slope (or the steepest going up).
That would be line C.
I hope this helps!
how is it possible to have a small power output when moving a large load a long distance
Answer:
is to increase efficiency
Explanation:
is to increase efficiency
cual es la masa de los planetas, y la distancia que hay de la tierra a cada uno de ellos.
Ayuda pliss
Answer:
Mercurio
Masa
3,285 × 10^23 kg
Mercurio está a una distancia promedio de 48 millones de millas (77 millones de kilómetros) de la Tierra.
Venus
Masa
4.867 × 10^24kg
En su punto más cercano a la Tierra, Venus está a unos 61 millones de kilómetros (38 millones de millas) de distancia.
tierra
Masa
5.972 × 10^24kg
Marte
Masa
6,39 × 10^23 kg
La distancia mínima de la Tierra a Marte es de unos 54,6 millones de kilómetros (33,9 millones de millas).
Júpiter
Masa
1.898 × 10^27kg
Debido a que ambos planetas viajan en una trayectoria elíptica alrededor del sol, la distancia de Júpiter a la Tierra cambia constantemente. Cuando los dos planetas están en su punto más cercano, la distancia a Júpiter es de solo 365 millones de millas (588 millones de kilómetros).
Saturno
Masa
5.683 × 10^26kg
Su distancia más cercana a la Tierra es de aproximadamente 1.200 millones de kilómetros (746 millones de millas)
Urano
Masa
8.681 × 10^25kg
la distancia entre la Tierra y Urano cambia diariamente. Lo más cerca que están los dos es 1.600 millones de millas (2.600 millones de kilómetros).
Neptuno
Masa
1.024 × 10^26kg
Cuando Neptuno y la Tierra se alinean en el mismo lado del sol, en su punto más cercano, están a solo 2,700 millones de millas (4,300 millones de kilómetros)
masa de Plutón =
1.30900 × 10^22 kilogramos
Plutón se encuentra a 4670 millones de millas (7500 millones de kilómetros) de la Tierra. En su punto más cercano, los dos están a solo 2660 millones de millas (4280 millones de km) de distancia.
When a gas is transferred from one container into another container, which of the following does not occur? a. The gas flows into the new container. b. The gas changes shape to fit the new container. c. The gas spreads out to fill the new container. d. The gas keeps its original volume. Please select the best answer from the choices provided A B C D
Answer:
B.
Explanation:
Gases flow and spread easily in all directions until they reach the walls of the container. It can have a definite volume, but no definite shape.
We all play on the roller coaster in playgrounds, but Ahmad suggested playing this game alone. Take point B as a reference level. Suppose Ahmad starts from rest at point A and moves downward towards point B. What happens to his gravitational potential energy as he moves downward?
Answer:
b
Explanation:
Please help me with this question
Answer:
5m
Explanation:
the amplitude of a wave is basically if you cut the wave in half horizontally and went from the half point to either the lowest or highest point of the wave. and the midpoint of wave A is 0 and u can either go up 5 to get to the highest point, or down 5 to get to the lowest point (;
f the crate starts from rest 8.95 mm up along the plane from its base, what will be the crate's speed when it reaches the bottom of the incline
Answer:
Its speed would be increasing.
Explanation: