Answer:
Astronauts float around in space because there is no gravity in space. Everyone knows that the farther you get from Earth, the less the gravitational force is. Well, astronauts are so far from the Earth that gravity is so small. This is why NASA calls it microgravity.
Explanation:
A straight line with a positive slope on a velocity-time graph indicates which of the following?
no mo
Answer:
constant acceleration
Explanation:
I may be wrong, but I'm almost positive cuz I am also taking physics. ;)
Answer:
Constant acceleration in the positive direction.
Explanation:
Because it is a straight line with a positive slope, we can infer that the rate of acceleration remains constant as the line is linear, and as it states in the question, the slope is positive; therefore, it is moving in a positive direction.
A quarter is flipped from a height of 1.45 m above the ground. How much time will it take to reach the ground if the person flipping the coin gave it a velocity of 10.32 m/s? Please answer in seconds and to the third decimal place.
It will take the quarter 0.151 seconds to reach the ground.
Given the following data:
Height = 1.45 metersInitial velocity = 10.32 m/sWe know that acceleration due to gravity (a) for an object is equal to 9.8 meter per seconds square.
To find how much time it will take the quarter to reach the ground, we would use the second equation of motion.
Mathematically, the second equation of motion is given by the formula;
[tex]S = ut + \frac{1}{2} at^2[/tex]
Where:
S is the height or distance covered. u is the initial velocity. a is the acceleration. t is the time measured in seconds.Substituting the values into the formula, we have;
[tex]1.45 = 10.32(t) + \frac{1}{2} (9.8)t^2\\\\1.45 = 10.32t + 4.9t^2\\\\4.9t^2 + 10.32t - 1.45 = 0[/tex]
The standard form of a quadratic equation is:
[tex]ax^2 + bx + c = 0[/tex]
a = 4.9, b = 10.32 and c = 1.45
We would solve the above quadratic equation by using the quadratic equation formula;
[tex]x = \frac{-b\; \pm \;\sqrt{b^2 - 4ac}}{2a}[/tex]
Substituting the values, we have;
[tex]t = \frac{-10.32\; \pm \;\sqrt{10.32^2\; - \;4(4.9)(1.45)}}{2(4.9)}\\\\t = \frac{-10.32\; \pm \;\sqrt{106.5024\; - \;28.42}}{9.8}\\\\t = \frac{-10.32\; \pm \;\sqrt{78.0824}}{9.8}\\\\t = \frac{-10.32\; \pm \;8.84}{9.8}\\\\t = \frac{-10.32\; + \;8.84}{9.8}\\\\t = \frac{1.48}{9.8}[/tex]
Time, t = 0.151 seconds.
Therefore, it will take the quarter 0.151 seconds to reach the ground.
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If you push on a cart, the force of friction will slow it down. Friction is the conversion of kinetic energy to __________ .
Answer:thermal energy
Explanation:The friction converts kinetic energy to thermal energy (heat). When two objects are in contact, friction will act with these two objects so this...
Answer:
Heat
Explanation:
Friction always slows a moving object down. ... Friction can be a useful force because it prevents our shoes slipping on the pavement when we walk and stops car tyres skidding on the road. When you walk, friction is caused between the tread on shoes and the ground. This friction acts to grip the ground and prevent sliding.
Una bola de 60 Kg se hace descender por medio de un cable, con una aceleración hacia abajo de 4 m/s2 . ¿Cuál es la tensión en el cable?
Answer:
240 N
Explanation:
La fuerza de la tensión del cable es la masa por la aceleración (F=ma).
F = (60)(4) = 240 N
for each pair of terms below, write a sentence that summarizes how they are different.
thermal conductor, thermal insulator
thermal expansion, thermal contraction
Answer:
Thermal expansion ,thermal contraction
Explanation:
They are different because it has different cause and chemical reactions
thermal contraction is a chemical reaction
Guys please help me on the rest of the numbers
Answer:
C. 100
D.3
E. 33.3
Explanation:
C. Mechanical Advantage=Load / Effort
= 200N
--------
100N
Therefore,. = 100
D. I. Velocity Ratio= distance moved by the effort / distance moved by load
= 30cm/10cm
= 3
II. Efficiency= M.A / V.R
= 100/3
= 33.33
¿Cómo
se
ajosta
o pondero un error de medicion?
Answer:
sorry do not speak Spanish so I would not be able to help you probably cannot read this but I would be happy to help you if you follow me and bake English so thank you
A cat falls from a table of height 1.3 m. What is the impact speed of the cat?
O A. 7.5 m/s
O B. 2.5 m/s
O C. 5.0 m/s
O D. 25.5 m/s
SUBMIT
The impact speed will be
v^2 = 2*9.8*1.3
v^2 = 25.48
v= 5.04 m/s or O C. 5.0 m/s
10. Which country creates the most waste per person? (1 point)
O Germany
O Sweden
United States
O United Kingdom
Finish Cancel
Answer:
United states creates the most waste per person
here’s a clearer picture :)
Explanation:
so your answer is 4 km/ day, which I have given in earlier answer,.
hope this helps you again.
the kinesis of objects and figures within the frame and of the frame itself are both aspects of ________.
If the masses are not changed, but the distance of separation is tripled, what happens to the for
In any sample of water, there are always some water molecules which have become ions. These ions are produced by transferring a ________ from one water molecule to another
Answer: Proton
Explanation:
why do some science classes teach that electrons, comparatively, have no mass?
helpppp ASAPPP
Answer:
An electron's mass is only 1/1,836 the mass of a proton. An electron is therefore considered nearly massless in comparison with a proton or a neutron.
A roller skate coming to a stop because of
friction from the floor is an example of which law of
motion?
Answer:
Laws of the Park: Newton's First Law
If you understand how a skateboard starts and stops, then you already know something about Newton's first law of motion. This law was developed by English scientist Isaac Newton around 1700.
Explanation:
Hope this helps..
how do the coils impact the strength of the magnetic fieldhow do the coils impact the strength of the magnetic field
I have a backbone and my body is covered with smooth, moist skin. I cannot regulate my own body temperature. I lay eggs in the water to reproduce. What can you infer from the description?The organism is an invertebrate.The organism is a vertebrate and an amphibian.The organism is a vertebrate and a mammal.The organism is a vertebrate and a reptile.
A 2.6 kg rock is dropped from a height of 10 m. With what speed will it strike the ground. Ignore air resistance. Solve using conservation of energy (start with Ebefore = Eafter).
Answer:
[tex]mgh = \frac{1}{2} m {v}^{2} \\ v = \sqrt{2gh} \\ = \sqrt{2 \times 9.8 \times 10} \: m. {s}^{ - 1} [/tex]
Why aren't pads or helmets necessary in flag football?
Answer:
because it is not nesscery
Explanation:
does a bike have mechanical advantage that is greater than 1, equal to 1, or less than 1?
Answer:
equal to 1 i think
Explanation:
A bicycle traveled 150 meters west from point A to point B. Then it took the same route and came back to point A. It took a total of 2 minutes for the bicycle to return to point A. Wgat is the average speed and average velocity of the bicycle?
Answer:
469
Explanation:
90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love u
A ball is rolling across the floor at a constant speed. What will happen to the ball if it is exposed to an unbalanced force in the same direction that it is moving?
A. It will immediately stop.
B. Its speed will increase.
C. Its speed will decrease.
D. Its motion will be unchanged.
Answer:
B. it's speed will increase
The statement "are either elements or compounds" describes a
A. pure substance.
B. mixture.
Answer: A. Pure Substance
Explanation:
If it is pure the substance has to be either an element or a compound.
Answer:
A. pure substance
Explanation:
This is because matter has distinct properties and the ingredients from sample to sample do not change, and all substances are either elements or compounds
HELP ASAP ILL GIVE BRAINLIST
How are translational, rotational, and oscillatory motion used in the design of various robotic assemblies?
Answer:
Each of the joints represents a degree of freedom in the manipulator system and allows translation and rotary motion :) Hope this helps
Two astronauts are playing catch in a zero gravitational field. Astronaut 1 of mass m1 is initially moving to the right with speed v1 . Astronaut 2 of mass m2 is initially moving to the right with speed v2>v1 . Astronaut 1 throws a ball of mass m with speed u relative to herself in a direction opposite to her motion. Astronaut 2 catches the ball. The final speed of astronaut 1 is vf,1 and the final speed of astronaut 2 is vf,2 .What is the speed vf,1 of astronaut 1 after throwing the ball?
The final velocity ([tex]v_1_f[/tex]) of the first astronaut will be greater than the final velocity of the second astronaut ([tex]v_2_f[/tex]) to ensure that the total initial momentum of both astronauts is equal to the total final momentum of both astronauts after throwing the ball.
The given parameters;
Mass of the first astronaut, = m₁Mass of the second astronaut, = m₂Initial velocity of the first astronaut, = v₁Initial velocity of the second astronaut, = v₂ > v₁Mass of the ball, = mSpeed of the ball, = uFinal velocity of the first astronaut, = [tex]v_f_1[/tex]Final velocity of the second astronaut, = [tex]v_f_2[/tex]The final velocity of the first astronaut relative to the second astronaut after throwing the ball is determined by applying the principle of conservation of linear momentum.
[tex]m_1v_1 + m_2v_2 = m_2v_2_f + m_1v_1_f[/tex]
if v₂ > v₁, then [tex]v_1_f > v_2_f[/tex], to conserve the linear momentum.
Thus, the final velocity ([tex]v_1_f[/tex]) of the first astronaut will be greater than the final velocity of the second astronaut ([tex]v_2_f[/tex]) to ensure that the total initial momentum of both astronauts is equal to the total final momentum of both astronauts after throwing the ball.
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Un avión vuela hacia al norte a una velocidad de 90 m/s, pero un fuerte viento sopla hacia al este a 20 m/s y desvía su rumbo. Realiza los trazos y encuentra el vector resultante.
La adicion de vectores permite encontrar la repuesta para la velocidad resultante del avión es:
Modulo de la veloicdad v= 92,2 m/s Dirección de esta veloicdad 12,5º al Norte del Este
Las magnitudes vectoriales son cantidades tienen modulo y dirección, la velocidad es una de estas magnitudes, por lo tanto deben ser sumada usando álgebra vectorial.
Un sistema de referencia es un sistema desde donde realizar las mediciones, en este caso indican que usemos un sistema de los puntos cardinales.
En el adjunto podemos ver un esquema de los vectores velocidad y su resultante, realicemos el calculo de la resultante por método analíticos
Indican que el valor de la velocidad hacia el Este es vₓ = 20 m/s y la velocidad hacia el Norte es v_y = 90 m/s, por lo tanto, para la magnitud usamos el Teorema de Pitágoras
[tex]R= \sqrt{v_x^2 + v_y^2}[/tex]
R = [tex]\sqrt{20^2 + 90^2}[/tex]
R = 92,2 m/s
Para encontrar la direccion usemos trigonometría
tan θ = [tex]\frac{v_y}{v_x}[/tex]
θ = tan⁻¹ [tex]\frac{v_y}{v_x}[/tex]
θ = tan⁻¹ 20/90
θ = 12,5º
La dirección se lee 12,5º al Norte del Este
En conclusión usando la suma de vectores podemos encontrar la repuesta para la velocidad resultante del avión es:
v= 92,2 m/s con dirección 12,5º al Norte del EsteAprender mas aquí:
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which planet has a moon with many sulfur volcanoes?
Jupiter i hope it is right answer
A current of 0.2 A flows through a conductor for 5minutes. How much charge would have passed through the conductor?
As we know,
[tex]electric \: \: current = \dfrac{charge}{time} [/tex]
so, let's solve for charge (q) :
time = 5 minutes = 5 × 60 seconds = 300 seconds.
[tex]0.2 = \dfrac{q}{300} [/tex][tex]q = 300 \times 0.2[/tex][tex]q = 60[/tex]hence, the charge = 60 coulombs (C)
In which of the following cases of motions, the distance moved and the magnitude of the displacement are equal?
If the car is moving on a straight road
If the car is moving in circular path
The pendulum is moving to and fro
The earth is moving around the sun
Answer:
answer is number (a) If the car is moving on a straight road....
Explanation:
The distance moved and magnitude of displacement are equal only in the case of motion along a straight line. Because displacement is the shortest path between initial and find path. So, for car moving on straight road, distance moved and magnitude of displacement are equal.
Two balls are dropped from rest and allowed to fall. If one ball is allowed to fall for 1 s and the other for 3 s compare the distances they have fallen.
The second ball traveled a greater distance when compared to the first ball because the second ball spent more time in motion.
The given parameters;
time of fall of the first ball, t = 1 stime of fall of the second ball, t = 3 sThe distance traveled by each ball is calculated using the second equation of motion as shown below.
The distance traveled by the first ball is calculated as follows;
[tex]h = u_0t + \frac{1}{2} gt^2\\\\h = 0 + \frac{1}{2} gt^2\\\\h = \frac{1}{2} gt^2\\\\h = (0.5\times 9.8\times 1^2)\\\\h = 4.9 \ m[/tex]
The distance traveled by the second ball is calculated as follows;
[tex]h = \frac{1}{2} gt^2\\\\h = (0.5\times 9.8\times 3^2)\\\\h = 44.1\ m[/tex]
Thus, the second ball traveled a greater distance because it spent more time in motion.
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