Answer:
58.3333333
miles
Explanation:
Which of the following has zeros that are not significant?
2.05 m/s
10.0 J
1.30 N
100 kg
Answer: Either 10.0 J or 1.30 N
Explanation:
10.0 J
if it was 10.01 it would be significant, but its 10.0 which makes it a whole number
1.30 N
All zero's preceding the first integers are never significant. For example: 0.0078 has two significant figures. All zero's after the decimal point are always significant. For example: 4.500, 45.00 and 450.0 all have four significant figures
Answer:
100 kg
Explanation:
With the absence of a decimal point, only the 1 would be significant.
Which statement accurately compares the trends in atomic number and atomic mass in the periodic table?
O The atomic number increases from left to right, while the atomic mass increases from right to left.
O The atomic mass increases from left to right, while the atomic number increases from right to left.
O Both the atomic mass and the atomic number increase from left to right.
O Both the atomic mass and the atomic number increase from right to left.
Answer:
C.
That is your answer
You serve a volleyball with a mass of 1.4 kg. The ball leaves with a speed of 13 m/s. Calculate KE
Answer:
118.3 J
Explanation:
Givens:
m = 1.4 kg
V = 13 m/s
Formula for kinetic energy:
KE = (1/2)*(m)*(v)^2
KE = .5*(1.4 kg)*(13 m/s)^2
KE 118.3 J
J = Joules
why does the fire snake weight less than it was when it was on fire
Answer:
When Zoe weighs the ingredients (sugar and baking soda), it weighs 25 grams in total. When she weighs the “snake” it weighs 23 grams. This is because some carbon dioxide gas produced during the chemical reaction escapes into the air.
6. What charge is in the nucleus?
a. negative charge
b. positive charge
C. no charge
d. positive and negative charges
Is visible light a form of
radiation? Explain.
Answer:
Yes,in fact visible 'light' is a form of radiation, which can be defined as an energy that travels in the form of electromagnetic waves. It can also be described as a flow of particle-like 'wave-packets', called photons, that travel constantly at the speed of light (about 300 000 kilometres per second).
Explanation:
We emphasize performance over participation well before kids' bodies, minds, and interests mature. And we tend to value the child who can help win games or whose families can afford the rising fees." Take some time to think through your answer.
Answer:
Yes.
Explanation:
Yes, we emphasize performance over participation of kids in a competition which causes negative effect on kid's personality. We also prefer those children whose families can afford the fees which is our big failure. We should emphasize participation over performance and prefer those child who has the ability to win the game instead of those who can afford the fees.
answer if you want to
Answer:
C
Explanation:
think of a diffuser
a ball is thrown vertically upwards from the ground. The ball rises and falls back to the ground. Describe the changes in the mechanical energy of the ball as it rises.
Answer:
as the ball is thrown, the enegry rises up, when it falls, the ball relseases all energy
Explanation:
A horizontal net force is exerted on a 2.0 kg object at rest. The object starts at x=0 m and travels 8.0 m along a horizontal frictionless surface.
What is the velocity of the object
Round answer to 2 significant digits
____ m/s
There's a constant force of 35 N exerted on the object of mass 2.0 kg, so it undergoes an acceleration a of
35 N = (2.0 kg) a → a = 17.5 m/s²
The object travels 8.0 m, so that it attains a velocity v of
v ² = 2 (17.5 m/s²) (8.0 m) → v ≈ 16.73 m/s ≈ 17 m/s
The velocity of the 2 Kg object which travels 8 m along the horizontal frictionless surface is 17 m/s
How to determine the acceleration Force (F) = 35 NMass (m) = 2 KgAcceleration (a) =?a = F / m
a = 35 / 2
a = 17.5 m/s²
How to determine the velocity Initial velocity (u) = 0 m/sDistance (s) = 8 mAcceleration (a) = 17.5 m/s²Final velocity (v) =?v² = u² + 2as
v² = 0² + (2 × 17.5 × 8)
v² = 280
Take the square root of both side
v = √280
v = 17 m/s
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What does it mean that photographs are two-dimensional?
Sam scored 98, 25, 105, 62 and 65 runs in 5 matches. What was the average score per match?
Answer:
71
Explanation:
if an object with a mass of 248kg is lifted 76 meters in 18 seconds, how much power is used?
Explanation:
power = 1/2 mass × velocity^2 >>1
velocity = distance / time = 76 /18 = 4.2m
then power = 1/2 × 276 × (4.2)^2 = 138 × 17.64 = 2,434.3 jules.
Diffferentiare between atmospheric pressure and liquid pressure
Hydrostatic pressure is the pressure exerted by an incompressible fluid (a liquid) at a given point, due to the weight of the fluid above it. Atmospheric pressure is the pressure exerted on a surface by the weight of the atmosphere (a compressible fluid) above it.
A car is traveling at a velocity of 22 m/s when the driver puts on the brakes
to decelerate it at 1.4 m/s? over a distance of 110 m. What is the car's
velocity at the end of this distance?
Answer:
v = v +at = 22 + (1.6 6.8 s ms) = 33 ms
Explanation:
help plz will give brainliest and dont answer if u dont know
Answer:
is highly motivated
Explanation:
Two charged objects originally felt 12N of attraction. One charge is changed from to 3C to 6C and their distance changes from 15cm apart to 45cm apart. What is the new force of attraction ?
Given that,
Initial force, F = 12 N
First initial charge, q₁ = 3C
First new charge, q₁' = 6C
Initial distance, r = 15 cm
New distance, r' = 45 cm
To find,
The new force of attraction.
Solution,
The force between two charges is given by :
[tex]F=k\dfrac{q_1q_2}{r^2}[/tex]
[tex]12=k\dfrac{3\times q_2}{15^2}\ ....(1)[/tex]
Let F' is the new force.
[tex]F'=k\dfrac{q_1'q_2'}{r'^2}[/tex]
[tex]F'=\dfrac{k\times 6\times q_2}{(45)^2}\ ...(2)[/tex]
As q₂ is same in this case.
Dividing equation (1) and (2) :
[tex]\dfrac{F}{F'}=\dfrac{k\dfrac{3q_2}{15^2}}{\dfrac{k\times 6\times q_2}{45^2}}\\\\\dfrac{12}{F'}=4.5\\\\F'=\dfrac{12}{4.5}\\\\F'=2.67\ N[/tex]
So, the new force of attraction is 2.67 N.
Given the impulse acting on an object and the impact time which equation can be used to calculate the force applied to an object
Answer is D
Ndmdjdndbdjdkskd
The impulse acting on an object and the impact time, the equation F= I / Δt can be used to calculate the force applied to an object, therefore the correct answer is D.
What is impulse?The product of the average applied force and the time for which it is exerted is known as an impulse.
the mathematical relation for impulse is
Impulse = F * Δt
where F represents the force applied and Δt represents the time for which the force is applied
Thus, the correct equation that can be used to calculate the force applied to an object is F = I /Δt and the correct option is D.
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if a 60 kg person was standing on a platform at the surface of saturn and they jumped, they would have to push with a force greater than..?
Answer:
A 60 kg person standing on a platform at the surface of Saturn and they jumped, they would have to push with a force greater than 540 N
Explanation:
The gravitational attraction between an object on the surface of a planet and the planet is given by the weight of the object
Therefore the force needed to be applied for an object to lift off the surface of a planet = The weight of the object
The weight of the object on the surface of a planet = m × g
Where;
m = The mass of the object
g = The strength of gravity on the planet's surface in N/kg
The given parameters are;
The mass of the person standing on a platform at the surface of Saturn, m = 60 kg
The strength of gravity on the surface of Saturn = 9 N/kg
Therefore, we have;
The weight of the person = The force greater than which the person would have to push on the surface of Saturn so as to Jump = The weight of the person on the surface of Saturn = 60 kg × 9 N/kg = 540 N
Therefore, for a 60 kg person standing on a platform at the surface of Saturn and they jumped, they would have to push with a force greater than 540 N.
Can the distance coverd by a body ever be negative? What about its distance and displacement
answer in photo enjoy
Explain relative velocity with examples
Answer:
Velocity of the moving objects with respect to other moving or stationary object is called “relative velocity” and this motion is called “relative motion”.
Explanation:
For example, you are in a bus and it goes with the velocity of 50 m/s to the east, then a truck passes you with a velocity of 60m/s to the east.
How can we transfer a table of motion data into a line graph?
Answer:
A table of motion (for a moving object) usually is something like:
Time I Position:
0s 1m
1s 3m
2s 5m
etc...
Where time is the independent variable and position represents the position of the object at that given time.
We can think in these points as coordinate pairs, for example, we can wrote these 3 pairs as:
(0s, 1m)
(1s, 3m)
(2s, 5m)
Now that we have these points, we can go to a coordinate plane and find these points
(The time would be on the horizontal axis, and position in the vertical axis)
Once you found the points, to complete the graph you need to find a line that connects the points.
An example of this is shown below, where the points used are the ones above, and the line should be straight.
is there any possibility to make 100% efficient system
Answer:
yes
Explanation:
its awesome
Which lighting source has lower energy costs and a longer life but can be dangerous?
a. fluorescent
b. laser
c. incandescent
d. neon
Answer: I'm like 98% sure it's fluorescent cause it's got mercury
Explanation:
In 1630 at the beginning of European settlement, about 425,000,000 hectares of the United States were covered with trees. By 2017, the area covered by trees was reduced to 300,000,000 hectares. What is the percentage decrease in the area covered by trees between 1630 and 2017?
Answer:
29.41%
Explanation:
Given that,
In 1630 at the beginning of European settlement, about 425,000,000 hectares of the United States were covered with trees.
By 2017, the area covered by trees was reduced to 300,000,000 hectares.
We need to find the percentage decrease in the area covered by trees between 1630 and 2017.
The percentage decrease in any value is given by :
[tex]\%=\dfrac{300,000,000 -425,000,000 }{425,000,000 }\times 100\\\\=29.41\%[/tex]
So, the percentage decrease in the area covered by the trees is 29.41%.
How are the energy conversions of machines similar to the energy conversions in your body
Answer:
Explained below
Explanation:
When we eat food, our body gets chemical energy from it. Now, this chemical energy from the food is changed into some different energy forms that is useful to it. They include:
-Chemical to mechanical energy to aid in movement of muscles
- chemical to thermal energy to aid in regulating the body temperature.
- chemical to electrical energy to aid the brain in thinking.
Thus is similar to how a machine converts energy because machines also generate energy after being powered and convert to other forms of energy. For example, an alarm clock converts electrical energy to sound energy, hair dryer converts electrical energy to thermal/heat energy.
Suppose that two objects attract each other with a gravitational force of 16 units. If the mass of both objects was tripled, and if the distance between the objects was doubled, then what would be the new force of attraction between the two objects?
Answer:
The new force of attraction would be 36 units
Explanation:
Law of Universal Gravitation
Objects attract each other with a force that is proportional to their masses and inversely proportional to the square of the distance.
This statement can be expressed with the formula:
[tex]\displaystyle F=G{\frac {m_{1}m_{2}}{r^{2}}}[/tex]
Where:
m1 = mass of object 1
m2 = mass of object 2
r = distance between the objects' center of masses
G = gravitational constant: [tex]6.67\cdot 10^{-11}~Nw*m^2/Kg^2[/tex]
Now suppose two given objects attract with a force of F=16 units, thus:
[tex]\displaystyle G{\frac {m_{1}m_{2}}{r^{2}}}=16[/tex]
And now the masses of both objects is tripled, i.e., m1'=3m1, m2'=3m2, and the distance between them is doubled, r'=2r. The new force is:
[tex]\displaystyle F'=G{\frac {3m_{1}3m_{2}}{(2r)^{2}}}[/tex]
Operating:
[tex]\displaystyle F'=G{\frac {9m_{1}m_{2}}{4r^{2}}}[/tex]
[tex]\displaystyle F'=\frac{9}{4}G{\frac {m_{1}m_{2}}{r^{2}}}[/tex]
Substituting the value of the initial force:
[tex]\displaystyle F'=\frac{9}{4}\cdot 16[/tex]
[tex]F'=36\ units[/tex]
The new force of attraction would be 36 units
current is a ______ quantity.
scalar or vector
Answer:
vector quantity............
Explanation:
Mark me braimlist
Answer:
scalar
Explanation:
I am giving 18 points. Please try and don’t just do it for the points.
They won’t let me shown the very last picture, it looks like the normal L shape that is in every picture, and just one straight line. L—
Like that.
Which of the following graphs below represents the motion of an object at variable speeds? (3 points)
Distance
(miles)
Time
(hours)
Distance
(miles)
Time
(hours)
Answer:Distance.
Explanation:
A 2.0 kg block is pulled across a horizontal surface by a 15 N force at a constant velocity.a. What is the net force acting on the block?
Answer:
0
Explanation:
the block is being pulled at a constant velocity meaning it has no acceleration. the rule is fnet=mass x acceleration so if theres no acceleration there is no force net!
A block of mass 2 kg is pulled across a surface with a force of 15 N then the net force acting on the block is 0.
What is Force?A force is an effect that can alter an object's motion according to physics. A force might cause an object has mass to accelerate when it changes its velocity, for, us when it moves away from rest. An obvious way to describe force is in terms of push or pull. A force is a vector quantity since it has equal magnitude and direction. It is calculated using the newton SI unit (N). Force is denoted by the letter F.
The net force exerted by an object was equal to the speed at which its velocity varies over time, according to Newton's second law in its original formulation.
The block has no acceleration because it is being pushed at a constant speed. If there is no acceleration, there is no force net because the formula is net force =mass × acceleration.
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