Answer:
Now the electroscope will allow you to identify whether an object is positively or negatively charged. If you bring a negative object near the electroscope, the electrons in the scope will be repelled toward the leaves, balancing the charge.
Explanation:
The electrostatic force obeys the principle of linear super-position which basically states
that force between two particles does not get affected by the charge of the other and hence if the
rod is brought close to a suspended metal needle and is getting attracted then needle definitely
should possess opposite charge relative to the rod or basically negative charge as opposite charges
attract.
(b) In case the needle which is brought near the sus[ended needle and gets repelled that shows that
both of them possess same charge and hence positive charge on both objects and will start
repelling each other.
A rocket, initially at rest, steadily gains speed for 4.00s while traveling upwards
70.0m.
What was the rocket's final speed?
Answer:
[tex]35.0\; \rm m \cdot s^{-1}[/tex].
Explanation:
The question states that the rocket gains speed steadily. In other words, the acceleration of this rocket in that four seconds would be constant.
Let [tex]a[/tex] denote the acceleration of this rocket.Let [tex]t[/tex] denote the duration of the acceleration.Let [tex]v_{0}[/tex] denote the initial velocity of this rocket.Let [tex]x[/tex] denote the displacement of this rocket.Using information from the question:
[tex]t = 4.00\; \rm s[/tex], [tex]x = 70.0\; \rm m[/tex],[tex]v_{0} = 0\; \rm m \cdot s^{-1}[/tex] since the rocket was "initially at rest".Apply the SUVAT equation [tex]\displaystyle \frac{1}{2}\, a \cdot t^{2} + v_{0}\cdot t = x[/tex] to find [tex]a[/tex], the acceleration of this rocket.
[tex]\displaystyle \frac{1}{2}\, a \times (4.00\; {\rm s})^{2} + 0 = 70.0\; \rm m[/tex].
[tex]\begin{aligned}a &= \frac{70.0\; \rm m}{\displaystyle \frac{1}{2} \times (4.00\; {\rm s})^{2}} = 8.75\; \rm m \cdot s^{-2}\end{aligned}[/tex].
In other words, this rocket accelerated from rest at a constant [tex]a = 8.75\; \rm m \cdot s^{-2}[/tex] for [tex]t = 4.00\; \rm s[/tex]. The final velocity of this rocket would be:
[tex]\begin{aligned}& v_{0} + a\cdot t \\ =\; & 0 \; \rm m\cdot s^{-1} + 8.75\; \rm m\cdot s^{-2} \times 4.00\; \rm s \\ =\; & 35.0\; \rm m\cdot s^{-1}\end{aligned}[/tex].
4. The modern particle theory of matter was generally accepted
in what century? Whose concept of matter was overturned by
this revolution in science?
Answer:
the modern particle theory of matter was accepted in the mid-ninteenth century. Aistotle's continoues theory of matter was overturned. They gave matter order and determine many of its properties. your welcome :)
A spider walks a distance of 0.2 m at a constant speed of 0.1 m/s. The time interval is
A.2 s
B.0.02s
C.0.5s
D.20s
Answer:
A. 2s
Explanation:
time = distance ÷ speed
T = .2 ÷.1
T= 2
The time interval will be Option B (0.02 s).
The given values in the question are:
Distance,
D = 0.2 m
Speed,
S = 0.1 m/s
As we know the formula,
→ [tex]Speed = \frac{Distance}{Time}[/tex]
or,
→ [tex]Time = \frac{Distance}{Speed}[/tex]
By substituting the values, we get
→ [tex]= \frac{0.2}{0.1}[/tex]
→ [tex]= 0.02 \ s[/tex]
Thus the above answer is right.
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Taipei, Taiwan has the world's fastest elevators. The peak speed can be 16 m/s while
the average speed is 15 m/s. How can the peak speed be higher than the average
speed?
Answer:
Because the average speed can be 0-16 m/s. But the peak speed must be 16 m/s.
Taiwan's Taipei has the world's fastest elevators. Since peak speed is the quickest that any moving body can go, it is greater than average speed. The average speed is 15 m/s, while the top speed may reach 16 m/s.
What is speed?Speed is the overall distance an item travels in a given amount of time.
speed =distance traveled /time consumed
Taiwan's Taipei has the world's fastest elevators. Because peak speed is the fastest that any moving body can move, it is why peak speed is greater than average speed.
The average speed is 15 m/s, while the top speed may reach 16 m/s.
While the average speed is an indication of the average.
Thus, the peak speed is higher than the average speed.
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Help, I really need to solve this right away!!
Answer:
can you like zoom in i cant see that much.
Explanation:
A lot of energy is not stored in biomass, but is used for biological processes instead. Which process
releases thermal energy?
Explanation:
Respiration releases energy - it is an exothermic process. This means it releases heat energy.
The process which releases thermal energy is respiration.
What is thermal energy?The energy which increase the temperature is called the thermal energy.
Biomass energy is created but can not be stored. Same way, the respiration process which releases heat in form of air from nose or mouth. This process is exothermic.
Thus, Respiration releases thermal energy.
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John took 45 minutes to bicycle to his grandmother's house, a total of 4 kilometers. what was his speed in km/hr?
What are you solving for?
What’s the equation?
Show work!
Help pleaseee!
Answer:
5¹/₃km/h
Explanation:
took him 45 minutes
in that 45 Minutes he travelled 4km
How can you minimize the error while measuring the length of the body? Write any two precautions to be followed. please fast...... emergency..
Answer: By double checking your work and by using quality equipment it minimizes the error while measuring the length of the body
Explanation:
Hopefully this helps
How do Newton’s laws of motion explain why it is important to keep the ice smooth on a hockey rink so that players can pass a puck as quickly as possible?
Answer:
Newton's first law
Explanation:
Newton's first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force. Therefore, when the ice is smooth, friction gets lesser, and the force acted on that Puck will be decreased.
Answer:
The first law states that “objects at rest and objects in motion remain in motion in a straight line unless acted upon by an unbalanced force”. Keeping the ice smooth will make sure there is not friction, friction would slow the puck down
Explanation:
The first law states that “objects at rest and objects in motion remain in motion in a straight line unless acted upon by an unbalanced force”. Keeping the ice smooth will make sure there is not friction, friction would slow the puck down
What product is formed by a reaction in which the hydrogen atoms of an acid are replaced by
the atoms of a metal?
A base
An oxide
A salt
An acid
The reaction of Acids with most metals and, when they do, a salt is produced without water.
Which of the following biogeochemical cycles moves water through the atmosphere, surface, and crust of Earth?
A. Carbon cycle
B. Hydrologic cycle
C. Nitrogen cycle
D. Phosphorus cycle
When you graph the motion of an object, you put _____ on the horizontal X axis and ____ on the vertical Y axis
Convert using chain link method 5.3 MIN/m² to N/mm²
Answer:
hohdoqjqwfojiqjwiojdq
Explanation:
huehqofjoiqjdoiwjqiojfiwjfiojeqojefiqjojeqiojoiewqdqwwqdwqd
If the magnetic flux through a certain region is changing with time: _________
a. a current must flow around the boundary
b. a magnetic field must exist at the boundary
c. an electric field must not exist at the boundary
d. an emf must exist around the boundary energy must be dissipated as heat
Answer:
It's option d. an emf must exist around the boundary
Explanation:
The Faraday's law states that an emf must exist around the boundary whenever there is a change occurring in the flux of a magnetic field.
An electric field is associated with every:____.
a. position-dependent magnetic field.
b. time-dependent magnetic field.
c. conductor moving in a magnetic field.
d. object moving in a magnetic field.
e. magnetic field.
Answer:
b. time-dependent magnetic field.
An electric field is associated with every time-dependent magnetic field.
What is electric field?An electric field is a physical field that surrounds electrically charged particles and acts as an attractor or repellent to all other charged particles in the vicinity. Additionally, it refers to a system of charged particles' physical field. The magnetic impact on moving electric charges, electric currents, and magnetic materials is described by a magnetic field, which is a vector field.
An electric field is produced by a time-varying magnetic field. The first law of Faraday states that an electromotive force is always produced when a conductor is exposed to a changing magnetic field. Induced current is the term for the current that results when the conductor circuit is closed.
An electric field is associated with every time-dependent magnetic field.
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A pipe drips at 155 mL/min.
Express this is units of gallons/day.
1. 2.34 gal/day
2. 15.7 gal/day
3. 942 gal/day
4. 58.9 gal/day
5. 223 gal/day
6. 377 gal/day
7. 0.223 gal/day
We have that the total pipe drip of [tex]X=155 mL/min.[/tex] expressed in gallons/day is
[tex]X=58.96gal/day[/tex]
From the Question we are told that
Pipe Drip[tex]=155 mL/min.[/tex]
Generally
We have that for mL to gallons conversion
[tex]1mL=0.000264172[/tex]
And
A minute to day con version is
[tex]1min=0.000694444[/tex]
Therefore
[tex]X=155 mL/min.[/tex]
[tex]X=155(\frac{0.000264172}{0.000694444})[/tex]
[tex]X=58.96gal/day[/tex]
In conclusion
The total pipe drip of [tex]X=155 mL/min.[/tex] expressed in gallons/day is [tex]X=58.96gal/day[/tex]
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Two falling inflated balls of different masses
land at the same time.
Answer:
-The air resistance statement goes with the pieces of paper statements
-The force of gravity statement goes with the dog statements
-The acceleration due to gravity goes with the two inflated balls
A block lying on an inclined plane has a weight of 50 N. It just begins to slide down when the inclination of plane with the horizontal is 30°. The value of u is
Answer:
μ = tanθ = tan30 = 0.58
Explanation:
μ = force parallel/force perpendicular = mgsinθ/mgcosθ = tanθ
An airplane with a total mass of 950 kg has an engine malfunction, causing it
to provide a constant horizontal force of 3000 N. The pilot, who has a mass
of 65 kg, decides to eject from the airplane. With the reduced total mass,
what is the new approximate acceleration of the airplane?
A. 3.7 m/s2
B. 2.8 m/s2
C. 3.2 m/s2
D. 3.4 m/s2
Answer:
3.4 m/s2
Explanation:
Multiple choice Questions about the statement true and how you can be separated by filtration and the way you treat your business and your business to make your life easier and easier to understand and understand the importance of life and damage
The new approximate acceleration of the airplane will be D. 3.4 m/s2
What is Newton's second law of motion ?
Newton's second law of motion states that the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it.
Initial mass = 950 kg
mass of piolet = 65 kg
reduced mass = 950 - 65 = 885 kg
according to Newton's second law of motion
force = mass * acceleration
3000 N = 885 kg * acceleration
acceleration = 3000 / 885 = 3.39 m/s^2 = 3.4 m/s^2
correct answer is D. 3.4 m/s2
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The speed limit on Highway 85 is 65 mi/h. What is it in m/s?
Answer:
29 m/s
Explanation:
65 mi/hr (1 hr/3600s)(5280 ft/mi)(12 in/ft)(2.54 cm/in)(1 m/100cm) = 29.0576
The speed limit on Highway 85 in meters per seconds is 29.07m/s
Given the speed limit on highway 85 as 65mi/hr
Using the conversion rate:
2.23694 mi/hr = 1m/s
We are to convert 65mi/hr to m/s, we can therefore write:
65mi/hr = x
Divide both expressions
[tex]\frac{2.23594}{65} = \frac{1}{x} \\Cross \ mutiply\\ 2.23594x = 65\\x = \frac{65}{2.23594}\\x = 29.070m/s[/tex]
This shows that the speed limit on Highway 85 in meters per second is 29.07m/s
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What topic name in physics does this equation belong to? g = Fg/m
A car travels 40 kilometers at an average speed of 80km/h and then travels 40 kilometers at an average speed of 40km/h. The average speed of the car for this 80-km trip is
Speed = distance / time
Part 1: 40 km at 80 km per goir = 0.50 hours
Part 2: 40 km at 40 km per hour = 1 hour
The time of the trip was 1.5 hours
Total distance was 40 + 40 = 80 ins.
Speed = distance / time = 80/1.5 = 53.33 km/he ( round answer as needed)
Two electric bulbs marked 25W – 220V and 100W – 220V are connected in series to a 440Vsupply. Which bulbs will fuse?
Answer:
25 W bulb will fuse.
The voltages will divide their ratios between the bulbs if we were to connect them.
When an object of mass 200g is submerged in methanol, its apparent weight is 1.052N. When submerged in benzene its apparent weight is 0.951N. If the density of methanol is 0.8g/cm^3, What is the density of benzene?
When the object is submerged in methanol, it displaces an amount of methanol with weight 1.052 N, i.e. with mass = (1.052 N)/g ≈ 107.347 g. With a density of 0.8 g/cm³, this means the displaced methanol and hence the object itself have a volume of
v ≈ (107.347 g) / (0.8 g/cm³) ≈ 134.184 cm³
Likewise, when submerged in benzene, the object displaces 0.951 N of benzene, whose mass is (0.951 N)/g ≈ 97.041 g with the same volume as the object. So the density d of benzene is
d ≈ (97.041 g) / (134.184 cm³) ≈ 0.723 g/cm³
What is the speed of a vehicle with a distance of 88 miles and a time of 4 hours????
The answer you are looking for is 22 mph.
Solution:
s=speed
d=distance
t=time
Setting up the formula for the speed of an object with distance and time:
s=d/t
Substituting the given values,
s=88 miles/4 hours
So, therefore, the final answer is 22 mph.
I hope this helped answer your question for you. Good day to you.
Answer:
352 miles answer
Explanation:
guessing that he kept going in a constant speed of 88 miles first you multiyply 88x4 which gives you 352 hoped it helped
A racecar races on a circular race track. Calculate the average racing speed given that
distance around the track is 2500 m and the racecar does it in 40 seconds.
Answer:
Below
Explanation:
You can use this formula to find the average speed or velocity of an object
speed = displacement / elapsed time
Plugging in our values....
speed = 2500 m / 40 seconds
= 62.5 m/s
*if your teacher required you to round to significant figures, you would round this number to 60, as 40 seconds only has 1 significant figure (the number with the least amount of sig figs determines the number of sig figs in the final answer)*
Hope this helps! Best of luck <3
5 The diagram shows a quantity of gas enclosed in a cylinder by a piston.
moves to the left
gas
+moves to the right
cylinder
piston
The piston is moved to the left or to the right. The temperature of the gas is kept constant
Which row describes the effect of moving the piston slowly in the direction shown in the table?
movement
of piston
speed of gas
molecules
pressure
of gas
A
to the left
increases
decreases
B
to the left
no change
increases
с
to the right
to the right
dreases
debebas
increases
D
no change
6 What causes the random, zig-zag movement (Brownian motion of smoke particles susne ded in
Answer:
A to the left increases and decreases
If I have 8.2 milliwatts of power and I need to convert into kilowatts my
answer should be?
Answer:
8.2 milliwatts = 8.2 x 10⁻³ watts = 8.2 x 10⁻⁶ kilowatts
Explanation:
There are 1000 milliwatts per watt and 1000 watts per kilowatt, therefore we need to move the decimal point 6 places to the left to convert mW to kW
How net current on a toroid is zero?
Answer:
The concept of zero net current in toroid occurs when we try to determine magnetic field induction outside toroid.
to determine magnetic field outside toroid, we consider a circular loop outside toroid as shown in figure.
to get the net enclosed current inside the loop, let us consider the crosssection AA' in toroid as shown in figure
as we see the crosssection AA' part of figure, we see that currents in the winding are in opposition directions at near to the loop
and far away from loop. Hence the concept of net current zero occurs in toroid when we try to determine
magnetic field induction outside toroid.
Have a Good day...
Two cars next to each other start moving in the same direction from rest, car A accelerates at m/s2 4 for 10 s and then travels at a constant speed, while car B accelerates at m/s2 5 until it reaches 25 m/s and then maintains This speed. What is the distance between the two cars when t = 15s?