Answer:
3.88 m/s North
Explanation:
We are given that
[tex]m_1=136kg[/tex]
[tex]m_2=100 kg[/tex]
[tex]v_1=6 m/s[/tex]
[tex]v_2=1m/s[/tex]
We have to find the speed and direction of the two players
immediately after the tackle.
Using linear conservation of momentum
[tex]m_1v_1+m_2v_2=(m_1+m_2)v[/tex]
Substitute the values
[tex]136\times 6+100\times 1=(136+100)v[/tex]
[tex]916=236v[/tex]
[tex]v=\frac{916}{236}[/tex]
[tex]v=3.88m/s[/tex]
Direction of the two players immediately after the tackle is North.
Which of the following is NOT a example
of a chemical change?
A. an egg being cooked
B. a piece of paper being torn
C. a piece of bread being toasted
Answer:
B. a piece of paper being torn
Explanation:
A chemical change is one that cannot be reversed. This means the original properties of the substance or object cannot be restored.
If you cook a raw egg, it would turn into a boiled egg (or a poached egg, however it is being cooked). The reaction is irreversible, so you cannot turn the cooked egg back into a raw egg - it is basically impossible to 'uncook' an already cooked egg.
When you toast a piece of bread, it turns into toast. You can't 'untoast' it back into bread. The chemical changes have already occurred and cannot be undone.
If you tear a piece of paper, it is still paper. You are only ripping it, not changing anything about it. You could simply tape the torn bit back to the original bit, or glue it - either way, it is still paper and nothing has occurred to drastically change the physical state of it.
Therefore, B is not a chemical change.
a cycle lasts for 8 seconds. what is the frequency
This frequency definition leads us to the simplest frequency formula: f = 1 / T . f denotes frequency and T stands for the time it takes to complete one wave cycle measured in seconds. The SI frequency unit is Hertz (Hz), which equals 1/s (one cycle per second)
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Hope It Helps!
If you pour hot soup into a bowl, and the bowl stays cool to the touch, you can assume that...
Answer:
The soup still is cool, or since its recent it will take a while to get warmer
Explanation:
out of solid and liquid in which the effect of gravity is more
Answer:
Liquid
Explanation:
Thw answer is liquid
NEED THIS DONE ASAP HELP
Answer: Exercise Physiology
Explanation:
When water waves meet, they can combine to form new waves. In constructive waves, a ________ amplitude wave is formed. In destructive waves, a wave with a __________ amplitude is formed. A) greater, smaller B) smaller, greater C) smaller, smaller D) greater, greater
Answer:
In constructive waves, a greater amplitude wave is formed. In destructive waves, a wave with a smaller amplitude is formed. (option A)
Explanation:
Interference is called the superposition or sum of two or more waves. Depending mainly on the wavelengths, amplitudes and the relative distance between them, there are two types of interference: constructive or destructive.
Constructive interference occurs when there are two waves of identical or similar frequency (both have motions equal to an even number of similar wavelengths) and overlap the peak of one with the peak of the other. These effects add together and make a wave of greater amplitude. All of this is possible because the waves were in the same phase in the beginning (in the same position).
Destructive interference occurs in the opposite case to constructive. When the crest of one wave overlaps the valley of the other, they cancel out since they are in different phases when they overlap (they were in different positions). That is, as in the case of constructive waves they were added, in the case of destructive waves they cancel out (subtract).
So, In constructive waves, a greater amplitude wave is formed. In destructive waves, a wave with a smaller amplitude is formed.
PLEASE HELP WITH THIS!
Answer: A
Explanation:
Parallel circuit. The source current is three times the current of a single bulb
What is the metric system of 1.0km to mm
Answer:
1 kilometer is equivalent to 1,000,000 <(million) millimeters
A plate has an area of 1m square. It slide down an incline plane , having an angle of inclined 60° to horizontal, which a velocity of 0.75m/s. The thickness of oil film between the plate and the plate is 2mm. Find the viscosity of the fluid if the weight of the plate is 90N
Answer:
[tex]\mu =0.169704 Ns/m^2[/tex]
Explanation:
From the question we are told that
Area of plate[tex]a=1m^2[/tex]
Angle of inclination [tex]\theta=60 \textdegree[/tex]
Velocity [tex]v=0.75m/s[/tex]
Thickness of oil [tex]t=2mm[/tex]
Weight of plate [tex]w=90N[/tex]
Generally the equation for shear force is mathematically given by
[tex]F=mgsin45 \textdegree[/tex]
[tex]F=90sin45 \textdegree[/tex]
[tex]F=63.639N[/tex]
[tex]F=\mu* \frac{v}{t}[/tex]
[tex]F=\mu* \frac{0.75}{2*10^-^3}[/tex]
[tex]\mu* \frac{0.75}{2*10^-^3}=63.639N[/tex]
[tex]\mu =\frac{63.639}{375}[/tex]
Therefore viscosity is given by
[tex]\mu =0.169704 Ns/m^2[/tex]
what is the magnitude of velocity for a 1500 kg car possessing 4500 kgm/s of momentum?
when you do work on an object you transfer,
Which of the following is an example of an electromagnet?
A. The magnets used to lift metal or cars in a salvage/junk yard
B. the bar magnets we used in the lab
C.the magnets used to hold pictures on a refrigerator or papers on a metal filing cabinet
Answer:
A. The magnets used to lift metal or cars in a salvage/junk yard
Explanation:
An electromagnet is defined as a type of magnet which are made up of wires in coil shape. Magnetic field in these wires are produced by electric current.
An example of an electromagnet is magnets used to lift metal or cars in a salvage/junk yard because a crane is used in junkyard to lift metal in which crane is attached to a iron disc and when electricity is off, the disc move downwards and placed near required metal and switch on the electricity when disc reaches on metal or cars to be lifted. This electricity generates magnetism in the iron disc and attract metal or cars from the junkyard.
Hence, the correct answer is "A. The magnets used to lift metal or cars in a salvage/junk yard".
Help! I don’t really know what it’s asking
Weightlessness occurs when an object applies a reaction force to another object. Please select the best answer from the choices provided T F
Answer: The answer is F
Explanation: because it is I took the test
Which features do sound waves have that ocean and light waves do not? Check all that apply.
compression
rarefaction
amplitude
wavelength
crests
frequency
speed
Answer:
frequency
Explanation:
Answer:
compressions and rarefactions
Explanation:
edge 2022
The use of force to move an object is
.
Which of the following correctly represents an element?
A Water - H20
B Copper - Cu
C Carbon monoxide - CO
D Salt - NaCl
Answer:
A water H2O
Explanation:
H2O is composed of 2 hydrogens which is represented H2 and the hydrogen is combined with one oxygen which forms water which is H2O
When a pressure is applied to an object, the volume of the object:
a. stays the same
b. increases
c. decreases
Answer:
C because at higher altitude the air density becomes smaller
Which layer in the image above represents the layer of the Earth composed of liquid metal? *
Answer:
4
Explanation:
Why can't a distance/time graph be used to find an object's velocity?
Answer:
for velocity we have to use displacement &distance is for speed
A motorcycle cop, parked at the side of a highway reading a magazine, is passed by a woman in a red Ferrari 308 GTS doing 120.0 km/h. After a few attempts to get his cycle started, the officer roars off 2.00 s later. At what average rate must he accelerate if 159 km/h is his top speed and he is to catch her just at the state line 3.04 km away?
Answer:
XZXDHF
Explanation:ZDHF
Identical twins, Angela and Aisha, were both born with cystic fibrosis, a genetic disorder. As they grew older, Aisha was able to stay healthy
for much longer periods of time than Angela.
Answer:
Their differences are most likely due to non shared environmental influences
Can someone please give me the answer by 10 minutes
20. The triple-point of water occurs at 273.16 K (0.01 °C) and a vapor pressure of 0.0060373 atm). At this point water can be ______________. solid B. Liquid C. Gas D. All of the above E. None of the above
Answer:
E i think.
Explanation:
The triple-point of water occurs at 273.16 K (0.01 °C) and a vapor pressure of 0.0060373 atm. At this point water can be solid, liquid and gas. So, option (D) is correct.
What is phase diagram?phase diagram: a graph that displays the limiting conditions for a substance's solid, liquid, and gaseous phases under changes in pressure, temperature, or another combination of variables, such as solubility and temperature.
The curves in the figure were derived from measurements taken at various pressures and temperatures, and they represent a typical phase diagram for a one-component system (i.e., one made up of a single pure chemical).
What is triple-point?The combination of temperature and pressure at which a substance can exist in all three of its states—gas, liquid, and solid—is known as the triple point.
The Kelvin(K), the International System of Units' (SI) fundamental unit of thermodynamic temperature, is defined using the triple point of water. The triple-point of water occurs at 273.16 K (0.01 °C) and a vapor pressure of 0.0060373 atm.
Learn more about triple point here:
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Review the poster.
https://www.cdc.gov/handwashing/pdf/wash-your-hands-fact-sheet-508.pdf
Which statement best describes the purpose of the “Stop Germs! Wash Your Hands” poster?
to inform people of when, how, and why to wash their hands
to entertain people with a how-to demonstration
to describe the sensory experience of washing hands
to persuade people to engage in more healthy hygiene practices
Answer: A, to inform people of when, how, and why to wash their hands.
Explanation: in the poster it shows when you should wash your hands, how you should wash your hands, and why its important to wash your hands! Please give brainliest!
The statement on the CDC poster is meant to to inform people of when, how, and why to wash their hands.
Why hand washing?Hand washing is a very important way of stopping the spread of infectious diseases. We saw this especially during the pandemic when there was a wider call for hand washing.
The statement “Stop Germs! Wash Your Hands” on the CDC poster is meant to to inform people of when, how, and why to wash their hands.
Learn more about hand washing: https://brainly.com/question/17756657
can you please explain hooks law?
Explanation:
Hooke's law is a law of physics that states that the force needed to extend or compress a spring by some distance scales linearly with respect to that distance—that is, Fₛ = kx, where k is a constant factor characteristic of the spring, and x is small compared to the total possible deformation of the spring.
Kelly Clarkson is running between the Patronas towers in Kuala Lumpur on a tightrope at a speed of 15 m/s. Kelly currently weighs 79 kg. What is her KE?
KE = 8887.5 J
Further explanationGiven
speed = 15 m/s
weight = 79 kg
Required
KE-Kinetic energy
Solution
Energy is the ability to do work
Energy because its motion is expressed as Kinetic energy (KE) which can be formulated as:
[tex]\large {\boxed {\bold {KE = \frac {1} {2} mv ^ 2}}}[/tex]
Input the value :
KE = 1/2 x 79 kg x 15² m/s²
KE = 8887.5 J
Answer:
KE = 8887.5 J
force of 7 N acts on an object.
The displacement is, say 8 m, in
the direction of the force
(Fig. 11.3). Let us take it that the
force acts on the object through
the displacement. What is the
work done in this case?
Explanation:
Given
Force (F) = 7 N
Displacement (d) = 8 m
work done (W) = ?
We know that
W = F * d
= 7 * 8
= 56 J
The work done in this case is 56 Joule.
how do I convert 550 nm to cm
Answer:
it = 5.5e-5 cm
just tyoe in on the search bar nm to cm and a calculatro comes up
Explanation:
how many electrons does a neutral atom of the element iron (fe) have?
Answer:
26 electrons
A neutral iron atom contains 26 protons and 30 neutrons plus 26 electrons in four different shells around the nucleus. As with other transition metals, a variable number of electrons from iron's two outermost shells are available to combine with other elements
Explanation:
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