Answer:
i think the answer is letter c
1. Why did Asteroid 2019 OK cause concern among scientists? * The asteroid was not detected until it was extremely close to Earth. It's the largest known near-Earth asteroid ever discovered. The asteroid's path was aimed directly at the moon. The asteroid was too large to be deflected away from Earth
Answer:
The asteroid was not detected until it was extremely close to Earth.
Explanation:
According to data from NASA, the Asteroid named 'Astriod 2019 OK', was detected when it was extremely close to earth with just about an estimated distance of 73,000 kilometers (45,000 miles) from the Earth.
Scientists were concerned at the proximity of this space object to the Earth before it was discovered, and it brought about a cause of concern that since it was not extremely large (estimated 57 to 130 meters wide) it creates a potential for other smaller asteroids to escape detection and struck the earth.
What is Vatiable Velocity?
Answer:
Explanation: When a body covers unequal distances in equal intervals of time in a specified direction, the body is said to be moving with a variable velocity. Example: A rotating fan at a constant speed has variable velocity, because of continuous change in direction.
Rotational speed refers to the number of complete _____ in a given amount of time.
Answer:
rotation
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In a tug of war , two teams pull on the rope with a certain force. If team A pulls on it with a force of 225 N and team B pulls on it with a force of 360 N, what is the magnitude of the resultant force on the rope?
Answer:
135 N
Explanation:
Given that:
In a tug of war, team A pulls the rope with a force of 225 N; &
Team B also pulls with a force of 360 N
The magnitude of the resultant force is the difference between the two forces since they are positioned in the opposite direction.
Thus;
The magnitude = 360 N - 225 N
So, magnitude of resultant force on the rope = 135 N
Brianna is rowing a small boat across a pond. The air is calm; there is no wind
blowing.
a. What type of friction is resisting her motion?
b. If two friends join her in the boat, will the friction force change? Why or why not?
PLEASE I NEEEED HEEEEEEEEEEEELP.
An air bubble of volume 20 cm³ is at the bottom of a lake 40 m deep, where the temperature is 4.0°c. the bubble rises to the surface, which is at a temperature of 20°c. take the temperature of the bubble’s air to be the same as that of the surrounding water. just as the bubble reaches the surface
A. Fluid Friction B. Yes, there is more mass on the boat.
Explanation:
Not very sure about B but goodluck.
If you neglect air resistance, the horizontal component of a projectile A. Is always changing B. Remains constant throughout the flight C. Increases, goes to zero, then increases D. Depends on who threw it
Answer:
B. Remains constant throughout the flight
Explanation:
If we completely neglect air resistance then the projectile will not have any horizontal resistances to deal with, therefore the horizontal component will remain constant throughout the flight. This would continue to be the case until it meets some form of resistance. Which assuming that everything else is normal would be the case since the force of gravity will push the projectile down (vertical component) until it hits the ground which in that instance would act as an opposing force to the horizontal component as well.
Your friend wants to lose weight around the belly. Your friend is planning to do crunches every day to lose the weight, but is not planning on doing any other exercises. Do you think this strategy will be effective? Why or why not? What can your friend do to increase the pace of weight loss? Explain your answer. Please hurry I need a paragraph!!!
But I will put it in my own words so it won't be plagerism!
Answer:
i don't think it will work
Explanation:
because in order to lose weight, you have to do more than one stretch because weight loss takes multiple steps and not just one exercise, it would also involve you to eat healthy and to increase the pace, your friend could go running, do yoga, eat healthier, drink more water, and do more than just a core workout and etcetera.
is jewelry gold a compound or mixture?
I think it’s a mixture.
Answer:
jewelry gold is a mixture.
Explanation:
it contains more than one element and its composition varies.
An object's movement around an internal axis is _____.
Answer:
brooo it is rotation .............
A person slides a box down a ramp. The box starts from rest 2m above the lowest point. The ramp is frictionless. Once the box reaches the bottom there is friction. For every 1m the box travels on the flat part increases by 100 J. Where does the box stop? The box has mass of 5 kg.
Answer:
.98m
Explanation:
Vf=Vi+2at
(V F)^2+2 ( change in distance )
X f= i ( change in V & T )
EK=1/2Mv^2,EG=mgh
This question involves the concepts of the law of conservation of energy, work done, Newton's Second law of motion, and equation of motion.
The box stops at a distance of "1.02 m".
First, we will use the law of conservation of energy to find out the final velocity when the box reaches the flat part.
[tex]Loss\ of\ Potential\ Energy=Gain\ in\ Potential\ Energy\\mgh=\frac{1}{2}mv^2\\\\2gh=v\\v=\sqrt{2gh}[/tex]
where,
v = speed = ?
g = 9.81 m/s²
h = height = 2 m
Therefore,
[tex]v=\sqrt{(2)(9.81\ m/s^2)(2\ m)}[/tex]
v = 6.26 m/s
Now, we will use the formula of work done to find out the force applied to the box to stop the motion:
[tex]W = Fd[/tex]
where,
W = Work Done = 100 J
F = Force applied = ?
d = displacement = 1 m
Therefore,
[tex]100\ J = F(1\ m)\\F = 100\ N\\[/tex]
Now, we will use Newton's Second Law of Motion to find out the deceleration of the person:
[tex]F=ma[/tex]
where,
m = mass = 5 kg
a = decceleration =?
Therefore,
[tex]100\ N = (5\ kg)a\\\\a=\frac{100\ N}{5\ kg}\\\\a = - 20\ m/s^2[/tex]
negative sign shows deceleration.
Now, we will use the third equation of motion to find the distance at which the box stops.
[tex]2as=v_f^2-v_i^2\\2(-20\ m/s^2)s=(0\ m/s)^2-(6.26\ m/s)^2\\\\s=\frac{40\ m/s^2}{39.24\ m^2/s^2}[/tex]
s = 1.02 m
Learn more about equations of motion here:
brainly.com/question/20594939?referrer=searchResults
The attached picture shows the equations of motion in the horizontal and vertical directions.
plz help meh and explain how to do it i suck at physics...
The variables with the subscript "i" refer to the initial masses (m) and velocities (v) of the shark and fish.
[tex]m_{1,i}[/tex] = 10 kg
[tex]m_{2,i}[/tex] = 0.5 kg
[tex]v_{1,i}[/tex] = 5 m/s
[tex]v_{2,i}[/tex] = 0 m/s
The variables with "f" refer to the final masses and velocities. Use the law of conservation of momentum to calculate these. The law says that the total momentum of the shark and fish before the fish is eaten should be equal to the momentum after the fish is eaten. We have
[tex]m_1v_1[/tex] = (10 kg) (5 m/s) = 50 kg • m/s
[tex]m_2v_2[/tex] = (0.5 kg) (0 m/s) = 0 kg • m/s
so the total momentum before the fish gets eaten is 50 kg • m/s.
When the shark eats the fish, its mass increases by 0.5 kg. So
[tex]m_{1,f}v_{1,f}[/tex] = (10.5 kg) [tex]v_{1,f}[/tex] = 50 kg • m/s
Solve for [tex]v_{1,f}[/tex] by dividing both sides by 50.5 kg to get
[tex]v_{1,f}[/tex] = (50 kg • m/s) / (50.5 kg) ≈ 4.76 m/s
You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?
Answer:
By watching in the door lock
Answer:
.-. you can flip a switch and look at the bottom or the top of the door and see if there’s a light of there isn’t then flip another one.
also the other chat that we were talking on got deleted
Which factors affect the flow of electric charge? Check all that apply.
-Voltage
-Ampere
-Ohm
-Resistance
-Volt
Answer: Voltage and resistance
Explanation: I took this quiz already
Answer:
The answer is voltage and resistance
Explanation:
got it right on edge
True or False?
There are equal numbers of protons and electrons in neutral atoms.
A foam square has a mass of 62 g and a volume of 72 cm'. What is the density?
A ball with an initial velocity of 2 m/s rolls for a period of 3 seconds. If the ball is uniformly accelerating at a rate of 3 m/s2, what will be the ball’s final velocity?
Answer: 11 m/s
vinitial=2 m/s
time=3 s
acceleration = 3 m/s^2
vfinal = ?
The key here is that it is a constant acceleration, so we can use the constant acceleration equations. The easiest one to use would be:
vfinal=vinitial + a*t
We need vfinal, so algebraically we are ready to put in numbers into the equation:
vfinal=vinitial + a*t = 2 m/s + (3 m/s^2)*(3 s ) = 11 m/s is the final velocity
The ball's final velocity is 11 m/s
From one of equations of kinematics for linear motion
We have that
v = u + at
Where v is the final velocity
u is the initial velocity
a is the acceleration
and t is the time
From the given information in the question
u = 2 m/s
t = 3 secs
a = 3 m/s²
Putting these parameters into the above formula
v = u + at
We get
v = 2 + (3×3)
v = 2 + 9
v = 11 m/s
Hence, the ball's final velocity is 11 m/s
Learn more here: https://brainly.com/question/25148505
7. The night of desest is very cold and the day is very
hot
Give reason
Answer:
1) Sand cannot hold the heat. It acts like a mirror to the sun. During the daytime, it stays warm, and when the Sun is absent it loses all its heat making the nights colder. There's nothing in the desert that can either absorb heat from the sun or hold it on the surface when the sun is set.
2) Deserts are hot primarily because of a lack of water. When the sun shines on the ground, all of the absorbed sunlight goes into raising the ground's temperature. DESERTS ARE COLD AT NIGHT:Because of the lack of water in the ground, and little water vapor in the air, most deserts can get quite cool at night.
3) The temperature in the desert can change drastically from day to night because the air is so dry that heat escapes rapidly at night. The daytime temperature averages 38°C while in some deserts it can get down to -4°C at night. The temperature also varies greatly depending on the location of the desert.
What type of combination is a mixture?
Answer:
A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids.
Explanation:
Answer:
A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids.
Explanation:
I just did the quiz on study jams and I got them all correct
The diagram below a free body diagram picturing a cyclist moving along a highway. 4 forces represented by arrows A,B,C, and D are acting on the cyclist as she pedals. The arrow that would best represent the normal force is:
10 Why is it important for basketball players to wear shoes with tread when playing? to increase the speed of the player to decrease the force between the player and the floor to increase friction between the floor and the player's feet to decrease the amount of force needed for the player to move
Answer:
to increase friction between the floor and the player's feet
Explanation:
It is important for basketball players to wear shoes with tread when playing in order to increase friction between the floor and the player's feet.
Friction between the floor and the player's feet will ensure that players do not trip easily during the course of playing. It also helps in such a way that players can stop quickly and run in the opposite direction without losing traction. Without this friction, it would be virtually impossible to play the game.
Jose lifts a 24N box with a force of 57N. What is the resulting net force?
Answer:
Jose lifts a 24N box with a force of 57N. What is the resulting net force?
Explanation:
Jose lifts a 24N box with a force of 57N. What is the resulting net force?