Answer:
It is not possible to get HIV from insect bites.
Explanation:
They don't inject the blood of the last person they bit. HIV is spread through the exposure of blood.
PLZZZZ HELP ME ASAP!! 50 POINTS IF CORRECT!!
A plastic rod is rubbed with a cloth and becomes positively charged. After charging, the rod is held close to the suspended table-tennis ball shown in Fig. 9.1. The table-tennis ball is covered with metal paint and is uncharged.
Describe what happens to the charges on the metal-painted table-tennis ball as the positively-charged rod is brought close to the ball.
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Answer:
Liquid
Explanation:
Before anything evaporates, it is in a liquid state.
pls help with my with my homework, i started it but i’m stuck on the rest. if my answers that i already put are wrong pls let me know
You are 100% right for question a and you have a good start on b!
Explanation:
For (ii) of part a, you could also say that since the friction force is in the opposite direction of the pushing force, that the friction is '-60N' The negative sign just shows the direction of friction relative to the pushing force. But for the magnitude the signs are not important.
For part b,
work done equals force × distance
w = F×d
In this case, the worker is pushing with 60 newtons, and the distance is 28m.
Therefore,
w = 60N×28m
w = 1680j
(Or 1.7kj)
Great job! You got most of it!
A substance has a freezing point of -36 degree C and a boiling point of 356 degree C. At what temperature would this substance be in its liquid state?
2 points
A.375 degree C
B.-100 degree C
C.80 degree C
D.-50 degree C
Answer:
C
Explanation:
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PLS HELP How much power is used if an athlete lives a 100n Weight up 5m in 20 seconds
Answer:
25J
Explanation:
power = work done ÷ time taken.
and work done = force applied × distance covered.
according to the question, the athlete lifts the weight of 100N upto 5m therefore;
100N × 5m = 500N/m
then onwards,
the work done (500 N/m) should be divided by the time taken to calculate the power,
500 ÷ 20s = 25J
is your answer.
hope this helped. :)
________________ is the measure of the quantity of the magnetism being the total number of magnetic lines of force passing through specified area in a magnetic field.
Magnetic intensity
Magnetic flux
Magnetic induction
Electric current
Answer:
Magnetic flux
Explanation:
Why the surface of Mars is red?
Answer:
Because the iron oxide chemicals in its soil looks like rust.
Answer:
Hey mate.....
Explanation:
This is ur answer.....
Mars is known as the Red Planet because the iron oxide chemicals in its soil looks like rust. The simple explanation for the Red Planet's color is that its regolith, or surface material, contains lots of iron oxide — the same compound that gives blood and rust their hue.
Hope it helps!
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PLEASE HELP (NO LINKS!)As the pendulum swings from position A to position B, what is the
relationship of kinetic energy to potential energy (neglect friction)? (5
points)
The kinetic energy increase is equal to the potential energy decrease.
The potential energy increase is equal to the kinetic energy decrease.
The kinetic energy and potential energy remain the same.
The kinetic energy increase is more than the potential energy decrease.
Answer:
the kinetic energy decrease is equal to potential energy increase
If the potential energy of pendulum increases then the kinetic energy decreases and if the kinetic energy increases then the potential energy decreases.
what is conservation of energy?According to the work power theorem the total energy of any object will remain constant like the sum of the kinetic and the potential energy of the object will remain constant.
The potential energy of any object is due to its position with respect to the ground. If the object is at a height of H then it will have a potential energy because some energy is given to that object against the gravity to move it to the height H.
The kinetic energy is the energy due to the velocity of the object and is given as the product of half mass to the velocity square.
Now we will express it in the form of the formula for better understanding .
[tex]\rm Total\ energy= KE+PE[/tex]
Now in the pendulum the motion is back and forth with respect to its mean position. So the total energy in the pendulum is the sum of the kinetic energy and the potential energy.
Now if the pendulum attains the maximum displacement from its mean position then it will have maximum potential energy and zero kinetic energy at this point.
Now if the pendulum is at the mean position now it will have maximum kinetic energy and zero potential energy at this point.At this point the potential energy totally converted to the kinetic energy.
Now at the maximum displacement the kinetic energy totally converts into the potential energy of the pendulum.
Thus If the potential energy of pendulum increases then the kinetic energy decreases and if the kinetic energy increases then the potential energy decreases.
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A stationary hockey puck has a mass of 0.27 kg. A hockey player uses her stick to apply a 18 N force over a distance of 0.42 m. How much work does this force do on the puck?
Group of answer choices
7.6 J
-43 J
-7.6 J
28 J
43 J
A sub-woofer is a type of speaker which plays only the very low notes in a song or movie. Which of the following frequencies would you expect to be able to hear from a sub-woofer?
A. 10 Hz
B.25 Hz
C. 750 Hz
D. 1000 Hz
What are the properties (SALT) of images in
a. A plane mirror?
b. A concave mirror at the different object locations?
c. A convex mirror?
d. A converging lens at the different object locations?
e. A diverging lens?
help please
which of the following reacts with most metals to form Hydrogen gas
A.acids
B.Bases
C.acids&bases
Answer:
acid and bases
Explanation:
Could somebody answer c i and ii
Answer:
velocity on the y axis and time on the x axis
Explanation:
The equation is acceleration=velocity*time. Time is always on the x axis
A car is moving at 5 m/s at first hill, h= 20 meters.
(a) Determine the speed of the car at C point.
(b) Determine the speed of the car at B point.
Convert 86400 seconds into days.
Answer:
1 day
Explanation:
86400s = 1440min
1440min = 24h
24h = 1 day
Answer:
1 Day
86400 seconds is equal to a day
When measurements are close to their true values, they are said to be
A. accurate
B. estimated
C. precise
D. standardized
Answer:
When measurements are close to true
value they are called to be accurate
Explanation:
Answer:
A) accurate
Explanation:
Accuracy refers to how close a measurement is to the true value of what is being measured.
What is the difference between Gravitational Potential Energy and Potential
Energy?
Answer:
Potential basically tells us the ability of an object to do some work. And Potential energy is the amount of energy it acquires due to that Potential difference.
Explanation:
A force of 20 N acts upon a 5000g block. Calculate the acceleration of the object
Answer:
a = 4 m/s²
Explanation:
Given: 5000 g, 20N
To find: Acceleration (a)
Solution: Firstly, convert 5000g to kilograms
1000g = 1kg
∴ 5000g = 5kg if divided by 1000
A = F ÷ m
= 20 ÷ 5
= 4 m/s²
Newtons are derived units, equal to 1 kg-m/s². In other words, a single Newton is equal to the force needed to accelerate one kilogram one meter per second squared.
where would you feel the most motion?
Answer:
A
Explanation:
since its the tip, you will feel it the most there.
7. What is the climate like on Mars?
Answer:
Temperatures on Mars average about -81 degrees F. However, temperatures range from around -220 degrees F. in the wintertime at the poles, to +70 degrees F.
Explanation:
A horizontal spring is lying on a frictionless surface. One end of the spring is attaches to a wall while the other end is connected to a movable object. The spring and object are compressed by 0.065 m, released from rest, and subsequently oscillate back and forth with an angular frequency of 14.7 rad/s. What is the speed of the object at the instant when the spring is stretched by 0.032 m relative to its unstrained length
Answer:
0.832 m/s
Explanation:
The work done by the spring W equals the kinetic energy of the object K
The work done by the spring W = 1/2k(x₀² - x₁²) where k = spring constant, x₀ = initial compression = 0.065 m and x₁ = final compression = 0.032 m
The kinetic energy of the object, K = 1/2mv² where m = mass of object and v = speed of object
Since W = K,
1/2k(x₀² - x₁²) = 1/2mv²
k(x₀² - x₁²) = mv²
mv² = k(x₀² - x₁²)
v² = [(k/m)(x₀² - x₁²)]
taking square root of both sides, we have
v = √[(k/m)(x₀² - x₁²)] since ω = angular frequency = √(k/m),
v = √[(k/m)√(x₀² - x₁²)]
v = ω√(x₀² - x₁²)]
Since ω = 14.7 rad/s, we substitute the other variables into the equation, so we have
v = 14.7 rad/s × √((0.065 m)² - (0.032 m)²)]
v = 14.7 rad/s × √(0.004225 m² - 0.001024 m²)]
v = 14.7 rad/s × √(0.003201 m²)
v = 14.7 rad/s × 0.056577
v = 0.832 m/s
What’s the answer??????????????????
How much work does a 120 watt motor perform for 300 seconds?
PLEASE I NEED HELP
and please don't add some site
Answer:
36,000j
Explanation:
W= P•t
120•300= 36000
I checked my answer with P= W/t and got the right answer
hope this helps
What is the characteristic of the columns in the periodic table?
Answer: The periodic table also has a special name for its vertical columns. Each column is called a group. The elements in each group have the same number of electrons in the outer orbital.
Explanation: :)
Which parental qualities promote healthy child development?
Answer:
Which parental qualities promote healthy child development? Check all that apply.
patient
dependable
lenient
disciplined
wealthy
Explanation:
A, B, D
How do I get number of atoms?
A baseball travels at a velocity of 45.3 m/s towards second base for 17 s. Calculate the displacement of the ball.
Answer:
770.1 m
Explanation:
From the question given above, the following data were obtained:
Velocity (v) = 45.3 m/s
Time (t) = 17 s
Displacement (d) =?
Velocity is defined according to the following formula:
Velocity = Displacement /Time
With the above formula, we can obtain the displacement of the ball as follow:
Velocity = Displacement /Time
45.3 = Displacement / 17
Cross multiply
Displacement = 45.3 × 17
Displacement = 770.1 m
Therefore the displacement of the ball is 770.1 m
Answer: 770.1 gravity multiplied by time
Whose atomic theory explains how atoms emit (release) and absorb light?
Bohr’s
Dalton’s
Rutherford’s
Thomson’s
Answer:
Bohr’s
Explanation:
Answer:
A
Explanation:
PLZ HELP I DONT KNOW THIS ONE
Some ancient objects have been well-preserved in high mountain ranges,
where the concentration of oxygen is low. Otzi the Iceman lived more than
5,000 years ago. Archaeologists found him with his leather pouch, clothes,
and tools perfectly preserved in the ice of the Alps.
Marie's mother lost a leather purse in the yard of their house in Florida, where
the air has more oxygen. Marie found it 30 years later under a tree. It was
rotted and decayed.
Review the information in the data table. What does this information tell you
about the rate of decay reactions relative to the concentration of oxygen?
Answer:
yeah
Explanation:
The information tells you about the rate of decay is that in Florida the reaction occurs more slowly when there is less oxygen in the air.
What is the rate of decay?The reduction in the number of radionuclides per unit time is the rate of decay.
The following table shows that the rate of decay only depends upon the level of oxygen. In Florida concentration of the oxygen in the air is high
Due to this the decay time is less.
The decay time is inversly propotional to the rate of decay. In Florida the rate of decay is high.
Hence the information is that reaction occurs more slowly when there is less oxygen in the air.
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