Answer: 9+3.5 m/52
Explanation:d=vit + 1/2 at2
d=0 + 1/2 -2 at2
d2/+2=A
a=(28m)/40.52
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].
What is the density of a substance that has a volume of 14 milliliters and a mass of 13.2 grams
Answer:
Below
Explanation:
You can use this formula to find the density of something
density = mass / volume
Plugging our values in.....
density = 13.2 / 14
density = 0.9428571429 g/mL
Rounding to sig figs we get....
density = 0.94 g/mL
Hope this helps! Best of luck <3
Answer:
[tex]\huge\boxed{\sf Density = 0.94\ g/mL}[/tex]
Explanation:
Given:
Volume = 14 mL
Mass = 13.2 g
Required:
Density = ?
Formula:
Density = Mass / Volume
Solution:
Density = 13.2 / 14
Density = 0.94 g/mL
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807Peace!what are the newtons law and their formulas
Answer:
Newton's second law of motion states that the acceleration ( a) experienced by an object is directly proportional to the net force ( Fnet) experienced by the object and inversely proportional to the mass of the object. In equation form, it could be said that a = Fnet/m. The net force is the vector sum of all the individual force values.
Explanation:
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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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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The bulb in the circuit shown in figure does not glow. Why? Redraw the circuit diagram by making necessary change in it so that the bulb glows.
Answer:The bulb did not glow as the switch is not turned on which obstructs electric current to flow through it. Also, the battery in the figure has both terminals as positive. It should be one negative terminal and one positive terminal.Redrawn diagram is also given
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More
Energy sources used today are mostly in what form of energy?
Select one:
O a.
electrical
O b. chemical
O c. nuclear
O d. radiant
Answer:
I think it is A. electrical.
Explanation:
I believe it is A, because most people today have phones and IOT use a phone, it has to be charged, and IOT charge a phone you have to use an outlet which uses electrical energy.
We have that the Energy sources used today are mostly in electrical form as the are required in the most accepts of living.
Option A
From the Question we are Given
a. electrical
b. chemical
c. nuclear
d. radiant
Generally all energy sources listed below are all good sources of energy and a very reliable
But the Energy sources used today are mostly in electrical form as the are required in the most accepts of living.
Therefore
The correct option is Option A
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what are the occupational respiratory disorders?
Answer:
the occupational respiratory disorders are the one that occur
due to long term inhalation of chemical proteins and dust and it affects respiration badly.
Explanation:
Occupational respiratory disease is any lung condition you get at work. It occues because of repeated exposure to certain toxins. You can even get a disease long after being exposed to those toxins. Certain workplaces lend themselves to disease.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
Extra Practice In Exercises 1-4, use the diagram. 1. Give two other names for CD.
Answer: I think it’s point cd and line cd
Explanation:
What do you know about physical education write one paragraph
For P.E
Answer:
PE is an abbreviation for 'physical education'. Physical education is a course taught in school that focuses on developing physical fitness and the ability to perform and enjoy day-to-day physical activities with ease. Kids also develop skills necessary to participate in a wide range of activities, such as soccer, basketball, or swimming. Physical Education (PE) develops students' competence and confidence to take part in a range of physical activities that become a central part of their lives, both in and out of school. A high-quality PE curriculum enables all students to enjoy and succeed in many kinds of physical activity.
Physical education is defined as formal instruction in exercise and proper eating. An example of physical education is gym class taught in middle school. ... Instruction in physical exercise and in the care and hygiene of the human bod
Physics help please
Answer:
what's your question?
Explanation:
I'm standby to answering your question.
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
7 (a) Use the kinetic particle theory of matter to explain why energy is needed to melt a solid, at its melting point, to form a liquid. - [2] (b) A student puts a drop of coloured ink into water. The ink slowly spreads throughout the water. Use the kinetic particle theory of matter to explain this observation.
Answer:
7 (a).
» At melting point, temperature is constant and there is increase in vibràtory energy of solid molecules increases. In that case, the mobílity or lovomotive degree of the solid molecules because the intermolecular forces between them have became weaker. Hence molecules become further apart from each other hence a liquid formed.
(b).
The molecules of the ink get bonded to the water molecules. Since water molecules have a high degree of mobílity or locomotion in different directions, the ink molecules also tend to move in different directions hence water turns colored.
Explanation:
[tex].[/tex]
The temperature remains constant and solid molecular vibrantion energy rises near the melting point. In that circumstance, the mobility or locomotive degree of the solid molecules has decreased as a result of the weakening of the intermolecular interactions. As a result of the molecules growing further apart, a liquid was created.
What is thermal energy?It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy.
The mobility or locomotive degree of the solid molecules has decreased as a result of the weakening of the intermolecular interactions. As a result of the molecules growing further apart, a liquid was created.
The ink molecules form bonds with the water droplets. Liquid changes color because of the ink molecules' propensity to migrate in distinct ways due to the great degree of mobility or motility that water droplets have.
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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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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
When you graph the motion of an object, you put _____ on the horizontal X axis and ____ on the vertical Y axis
Denial cycled at 6 mph for 0.8 h. Then he jogged at 2 mph for
1.2 hours. What was Denial's average speed for the total
distance?
mph
Average speed is difined as the total distance travelled divided by the total time required to cover the distance. Mathematically, it is expressed as:
[tex]Ave. Speed = \frac{Total distance }{Total time}[/tex]
To obtain the average speed of Daniel, we shall determine the distance travelled in each case. This is illustrated below:
Case 1:Speed 1 (S₁) = 6 mph
Time 1 (t₁) = 0.8 h.
Distance 1 (D₁) =?[tex]Speed = \frac{Distance}{Time} \\\\S_{1} = \frac{D_{1}}{t_{1}} \\\\6 = \frac{D_{1}}{0.8}[/tex]
Cross multiply
D₁ = 6 × 0.8
D₁ = 4.8 mileCase 2:Speed 2 (S₂) = 2 mph
Time 2 (t₂) = 1.2 h.
Distance 2 (D₂) =?[tex]S_{2} = \frac{D_{2}}{t_{2}}\\\\2 = \frac{D_{2}}{1.2}[/tex]
Cross multiply
D₂ = 2 × 1.2
D₂ = 2.4 mileNext, we shall determine the total time. This can be obtained as follow:
Time 1 (t₁) = 0.8 h.
Time 2 (t₂) = 1.2 h.
Total time (T) =?T = t₁ + t₂
T = 0.8 + 1.2
T = 2 hNext, we shall determine the total distance. This can be obtained as follow:
Distance 1 (D₁) = 4.8 mile
Distance 2 (D₂) = 2.4 mile
Total distance (D) =?D = D₁ + D₂
D = 4.8 + 2.4
D = 7.2 mileFinally, we shall determine the average speed of Daniel. This can be obtained as follow:
Total time = 2 h
Total distance = 7.2 mile
Average speed =?[tex]Ave. speed = \frac{Total distance }{Total time} \\\\Ave. speed = \frac{7.2 }{2}[/tex]
Average speed = 3.6 mphTherefore, the average speed of Daniel is 3.6 mph
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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...
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
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
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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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.
Backwards Alphabet Code Use the Backwards Alphabet Code to unlock the hidden statement. Refer to letters along the top row of the code to unscramble the letters in parentheses below write one letter per space. Do not capitalize the letters.
Answer:
1. Perform
2. Alertly
3. Energy
4. Meeting
5. Endure
6. Stress
7. Unfit
8. Major
9. Healthy
fill the blank spaces with suitable terms a heat energy from bottom
to the top of atake is
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
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 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
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
What topic name in physics does this equation belong to? g = Fg/m