Answer:
Laika
Explanation:
The dog's name was originally Kudryavka, or Little Curly, but she became known internationally as Laika, a Russian word for several breeds of dog similar to a husky. American reporters dubbed her Muttnik as a pun on Sputnik. Unfortunately, Laika's trip into space was one-way only.
Answer:
Laika
Explanation:
The dog is very cute buut it died i nearly cried
ASAP WILL GIVE BRAINLIEST Take a piece of paper, some nails and a magnet bar, place a magnet at the centre of the paper, and sprinkle the nails. Observe what will happen to the nails and what other phenomena you can observe.
Answer: find the answer in the explanation
Explanation:
When a magnet is placed at the centre of the paper, and the nails are sprinkled on the paper, what will happen to the nails is that, the nails will form a pattern on the paper according to the magnetic field of the bar magnetic pole.
Other phenomena you can observe are:
1.) The nails will align themselves and show some lines of forces which is equivalent to the magnetic field lines
2.) The direction of the line of forces
3.) The strength of the magnetic field pole.
What is the power of 10 when 157,821 is written in scientific notation
Answer: 5
We write the number 157,821 by moving the decimal place to the left
until the first number, taking note of the number of times you moved it.
Therefore, it is written as 1.57821 x 10^5. The power of 10 would be 5.
I NEED HELP PLEASE, THANKS! :) A rubber rod can be charged negatively when it is rubbed with wool. What happens to the charge of the wool?
Answer:
A rubber rod can be charged negatively when it is rubbed with wool. If the rubber rod is charged negatively, a positive charge is induced into the wool. Remember, whenever two neutral objects are rub against each other , an opposite charge is induced in both of the objects.
The impact on the charge of the wool should be explained below:
Impact on the wood charge:A rubber rod could be charged negatively at the time when it is rubbed with wool. In the case when the rubber rod is charged negatively, a positive charge should be induced into the wool. Also, whenever two neutral objects are rubbed against each other, an opposite charge should be induced in both of the objects.
Learn more about charge here: https://brainly.com/question/13030344
Which describes how to calculate density? mass divided by volume volume divided by mass mass added to volume volume subtracted from mass
Answer:
Mass divided to volume (D = M/V)
Explanation:
Its the formula :)
Answer:
A. mass divided by volume
Explanation:
The density formula is given as:
d=m/v
where m is the mass and v is the volume.
In this formula, the mass of an object is divided by its volume. Therefore, the correct answer is A. mass divided by volume.
The total distance from a house to a school to is 9.5 km. A student travels all the way from his house to the school and back to his house again. The displacement during this journey is:
9.5 km
19 km
0
explain your answer
Answer:
0
Explanation:
Displacement is a vector from initial to final point. Because initial and final point are the same, so displacement is 0.
A boat travels at 15 m/s in a direction 45° east of north for an hour. The boat then turns and travels at 18 m/s in a direction 5° north of east for an hour.
What is the magnitude of the boat’s resultant velocity? Round your answer to the nearest whole number.
Answer:
16 m/s
Explanation:
First, find the displacement in the east direction.
x = (15 m/s sin 45°) (3600 s) + (18 m/s cos 5°) (3600 s)
x = 102,737 m
Next, find the displacement in the north direction.
y = (15 m/s cos 45°) (3600 s) + (18 m/s sin 5°) (3600 s)
y = 43,831 m
Find the magnitude of the displacement.
d = √(x² + y²)
d = √((102,737 m)² + (43,831 m)²)
d = 111,697 m
Finally, find the resultant velocity.
v = d / t
v = (111,697 m) / (7200 s)
v = 15.5 m/s
Rounded to the nearest whole number, the resultant velocity is 16 m/s.
I NEED HELP PLEASE, THANKS! :)
Radio waves can bend around buildings. An X-ray technician stands behind a wall during the use of her machine. What does this tell you about the relative wavelengths of these two types of invisible light?
Answer:
Radio waves have a wavelength between [tex]10^{-9}m[/tex] and [tex]10^{-12}m[/tex]
While,
X rays have a wavelength between 1m and 10km.
=> It is one of the condition of diffraction that the obstacle (coming in the way) must be comparable with the size of the wavelength.
=> This shows, that radio waves have a wavelength which is comparable with the size of buildings and can really easily diffract through it
=> While, X-rays are big enough to diffract through the wall.
So, if an X-ray technician stands behind a wall during the use of her machine, she will remain safe.
a car travels 30 miles in two hours, what is its speed?
Answer:
15 mph
Explanation:
t ÷ d
time ÷ distance
30÷2
=15
Answer:
15 mph
Explanation:
Speed can be found using the following formula.
s=d/t
where d is the distance and t is the time.
The car traveled 30 miles in 2 hours. Therefore, the distance is 30 miles and the time is 2 hours.
d=30 miles
t=2 hours
s= 30 miles/2 hours
Divide 30 by 2
s=15 miles/hour
The car's speed is 15 miles per hour.
Which of the following are valid expressions?
Answers:
validnot validvalidnot validnot validvalidIn short, the boxes you check will be box 1, box 3, box 6.
================================================
Explanation:
It's not stated, but I'm assuming that A,B,C are three dimensional vectors
I'll go through each answer choice to say whether it's valid or not.
---------------------------
Choice 1
A x B is some vector
(A x B) x C is some other vector. Cross products produce vectors as outputs, when the two inputs are both 3D vectors. The output vector is the same dimension as the inputs.
Overall, the expression (A x B) x C is valid.
---------------------------
Choice 2
A dot B is a scalar
(A dot B)C is some vector
A dot (B x C) is a scalar
We cannot add a scalar to a vector. The given expression (A dot B)C + A dot (B x C) is not valid
---------------------------
Choice 3
B x C is a vector
B dot (B x C) is scalar
A[ B dot (B x C) ] is a vector in the form kA with k as a scalar.
The overall expression is valid
---------------------------
Choice 4
B x C is a vector
B(B x C) is not valid. We need to use a dot or cross symbol between the B and (B x C).
If we had kB with k as a scalar, then we don't need a symbol between them.
---------------------------
Choice 5
A dot B is a scalar
Scalars are not allowed when it comes to cross products, so (A dot B) crossed with anything is not valid.
---------------------------
Choice 6
B x C is some vector
A dot (B x C) results in a scalar
The expression is valid
Which is a resource that the National Park Service manages?
Answer:
Natural areas, historical areas, and recreation areas
Answer:
the answer is B wildlife refuges
Explanation:
Which is the process by which a gas changes to a solid? deposition evaporation freezing sublimation
Answer:
Deposition
Explanation:
Answer:
deposition
Explanation:
qasdsfa32
when Heather swings on a swing set she moves in a periodic motion like a pendulum she has a mass of 62 kg if Heather has a maximum height of 1.2 M what is her maximum velocity?
Answer
U Max velocity= Potential energy= kinetic energy
The potential energy is the product of mass * acceleration due to gravity * height
The kinetic energy is the product of 1/2 mass* square of velocity.
Max Velocity=mgh= 1/2mv^2
Mass is given as 62kg, height =1.2m and g= 9.8m/s^2
62kg* 9.8m/s^2*1.2= 1/2*62kg* v^2
729.12=31v^2
V^2= 729.12/31 =23.52
V^2=square root of 23.52
V= 4.85m/s
1) Which one of the following is vector,
B) Momentum
C) Mass
A) Energy
D) Temperature
Answer:
momentum is a vector quantity that points in the same direction as velocity
Explanation:
calculate the time taken to raise the temperature of 1.5 kg of water in a kettle from 15°C to 100°C given that specific heat capacity of water is 4200 J/kg/K and the heater is rated 250V , 2kW
Answer:
270 s or 4.5 min
Explanation:
First find the amount of heat needed:
q = mCΔT
q = (1.5 kg) (4200 J/kg/K) (100 − 15) K
q = 535,500 J
q = 535.5 kJ
Power is energy per time.
P = E / t
2 kW = 535.5 kJ / t
t = 270 s
In an experiment, a student placed a sheet of paper on a bar magnet, and iron filings were sprinkled on the
sheet of paper. Thereafter, the paper was gently tapped. The diagram below shows the final result of the experiment
Question 1
experiment
a Give the aim of the experiment. (2 marks)
o What conclusion could be drawn from the result
of such an experiment? (2 marks)
c. What could have happened if the iron filings had been replaced with grit? (2 marks)
Answer:
a. Aim of the experiment: To identify the magnetic fields around the bar magnet.
b. After tapping the paper, the iron filings align themselves according to the lines of the magnetic force of bar magnet. The magnetic field is more concentrated at the ends of poles as most of the iron fillings are attracted at the poles and the pattern form by iron filling shows the magnetic field of the bar magnet.
c. If iron filings will be replaced with grit, there will be no magnetic movement around bar magnet as grit is not a metal and do not have any magnetic properties.
Explanation:
a) The experiment with paper, iron sprinkles and bar magnet was performed to show the presence of the magnetic field around the magnet.
o) In the experiment, when we placed two opposite poles and sprinkled the iron over, the iron filings were aligned between forces applied by the opposite poles that are they attract each other. When the same poles were placed facing each other, the iron sprinkles were arranged away from each other. This shows that opposite poles attract each other while the same poles repel each other.
c) If iron filings were replaced with the grit, the magnetic field will be stronger.
Look at figure D . Explain what will happen if a larger mass it put on the force meter
it will experience great force
A student's tonsils become infected and she has them removed. What condition does she need to be careful of in the future?
(2 points)
Answer:
she will have a reduced ability to fight airborne pathogen.
Explanation:
This is because the tonsils have an ability to fight airborne diseases as well as protect the body from pathogens
Which phrase best describes the time period in which the current body of scientific knowledge was developed? A. Just over the last 50 years B. Throughout all of history C. Mostly in the 20th century D. Mostly during Roman times
Answer:
The correct option is;
B. Throughout all of history
Explanation:
A body of knowledge comprises of a given collection of concepts, activities and terms that represents a professional discipline that is outlined by the associated scholarly society, therefore, scientific knowledge, being comprised of very diverse field of knowledge, with different approaches and changing understanding is taking as a process of learning about the universe data collection, experimenting analysis and communication with a theme of systems, equilibrium, models and constant change which makes the basis of the body of scientific knowledge to be throughout all of history.
Please can someone help me.
I need answer ASAP. will mark Brainliest.
Starting from rest on a level road a girl can reach a speed of 5m/s in 10s on her bicycle. Find
a) the acceleration,
b) the average speed during the 10s,
c) the distance she travels in 10s.
Explanation:
acceleration=∆v/∆t
∆v=5-0
∆t=10-0
a=5/10
a= 0.5m/s²
speed= distance/time
average speed =5+0/2
=5/2
=2.5m/s
speed=distance/time
5=d/10
d=10*5
=50m
Archer shoots his arrow towards a target at a distance of 90 m and hits bullseye . Calculate the acceleration and time taken by the arrow to hit the target with a velocity of 90.0 m/s
Answer:
acceleration = 45 m/s²
Time = 20 seconds
Explanation:
We are given;
Distance; s = 90m
Final velocity;v = 90 m/s
Since shot from rest, initial velocity;u = 0 m/s
So, to find the acceleration, we can use Newton's 2nd law of motion which is;
v² = u² + 2as
Where a is acceleration
Plugging in the values;
90² = 0² + 2a(90)
8100 = 180a
a = 8100/180
a = 45 m/s²
Now, for the time, we will use Newton's 1st law of motion which is;
v = u + at
Where t is time;
So;
90 = 0 + 4.5t
90 = 4.5t
t = 90/4.5
t = 20 seconds
Explain briefly the first aid measure that should be taken incase of poisoning
Answer:
How you treat someone who may have been poisoned depends on:
The person's symptoms
The person's age
Whether you know the type and amount of the substance that caused poisoning
If you are concerned about possible poisoning, call Poison Help at 800-222-1222 in the United States or your regional poison control center. Poison control centers are excellent resources for poisoning information and, in many situations, may advise that in-home observation is all that's needed.
An electric current always produces a magnetic field that is ______ to the field. A. perpendicular B. parallel C. at a 37° angle D. none of the above
Answer:perpendicular
Explanation:
The electric current always generated the magnetic field that should be perpendicular to the field.
Relationship of electric current and magnetic field:In the case when the work should be compassed when the pointing is to be done along with the magnetic field lines so this represent that there should be the magnetic field that should be near the wire via the current should be flowing. here the magnetic field generated by the electric current should always be perpendicular to the current flow direction.
Learn more about electric current here: https://brainly.com/question/24301101
A person, with a mass of 50.0 kg, stands on a weighing scale in a lift which is moving
upwards with a uniform acceleration of 5.0 m/s
2
. What would be the reading on the
scale?
(A) 490 N (B) 250 N (C) 740 N (D) 240 N
Answer:
D
Explanation:
Because I just had that answer
I NEED HELP PLEASE, THANKS! :)
Tom’s father is 48 years old. He is not able to see nearby objects clearly.
-What may be the reason for his vision problem?
-Where are images formed in this type of defected vision?
-How is this defect corrected?
Answer:
Explanation:
1) Hypermetropia (better known as Farsighted- this is why nearby objects seem blurry for him)
2) In such instances, image are typically formed farther from the near point
3) Such defects are quite common so there are common procedures such as using convex lens which can restore the sight to normal.
I NEED. HELP PLEASE, THANKS! :) Air is an insulator. However, in winter you might experience a spark when your fingers touch a doorknob. Briefly explain why this happens.
Answer:
This is because of the static electricity which is generated in bodies due to friction. Time to time, the door knob gets touched by many people and the charge on it goes on increasing because of increasing friction. When the charge is increased much, after a considerable time, one may get a spark or a mild shock.
Which of the following best describes atoms with low electronegativity?
A. They tend to lose electrons and become cations.
B. They tend to lose electrons and become anions.
C. They tend to gain electrons and become cations
D. They tend to gain electrons and become anions.
juie ran eight laps around her school's quarter mile track in 18 minutes. her average velocity was _______m/s
Answer:
About 3m/s
Explanation:
If Julie ran eight quarter mile laps, then she ran a total of 1/4 * 8=2 miles. 2 miles is about 3220 meters, and 18 minutes is 1080 seconds, meaning that her average velocity was about 3m/s. Hope this helps!
Part B
What were the reactants of the first experiment in the video?
1
х,
Font Sizes
A -
A
: EEE
Answer:
zinc and hydrochloric acid
Explanation:
Answer:
The reactants he used in the first experiment were zinc metal and hydrochloric acid.
Explanation:
edmentum
when light passess from air into glass the angle of incidence is always _______ the angle of refraction
Explanation:
The angle of incidence is always smaller than the angle of refraction
Para que ángulo el alcance es igual a la altura máxima en un lanzamiento de proyectil ideal sobre un plano horizontal. Translation: For which angle the range equals the maximum height in an ideal projectile launch on a horizontal plane. a) 45º b) 60º c) 76º d) 90º
Answer:
76°Explanation:
In projectile,
Maximum height = [tex]\frac{u^{2}sin^{2} \theta }{2g}[/tex] and range = [tex]\frac{u^{2}sin2\theta }{g}[/tex]
u = velocity of the body
[tex]\theta[/tex] = angle of launch
g = acceleration due to gravity
If the range equals the maximum height in an ideal projectile launch on a horizontal plane, this means;
[tex]\frac{u^{2}sin^{2} \theta }{2g} = \frac{u^{2}sin2\theta }{g}[/tex]
since [tex]sin2\theta = 2sin\theta cos\theta[/tex]
[tex]\frac{u^{2}sin^{2} \theta }{2g} = \frac{u^{2}2sin\theta cos\theta }{g}\\\frac{sin\theta}{2} =2cos\theta \\sin\theta = 4cos\theta\\\frac{sin\theta}{cos\theta} = 4\\tan\theta = 4\\\theta = tan^{-1} \\4\theta = 75.9^{0}[/tex]
The angle at which the range equals the maximum height in an ideal projectile launch on a horizontal plane is approximately 76°