a). 1.2 s
b). 3.81 m
c) v= 6.8 m/s
d) v= 27.05 m/s
What is speed?Speed is define as the distance per unit time. It is also define as how fast an object is moving.
According to the question:
Height = 1.5 m , speed = 7.0 m/s.
a)By using 1st equation of motion
[tex]V = V_{0} + g*t.\\V = 0 \\V_{0} = 7.0 m/s.g = -9.8 m/s^2\\0 = 7 + (-9.8 m/s^2)*t\\t = 1.2 s[/tex]
b.
[tex]h = 1.5 + V_{0} *t + 0.5g*t^2\\V_{0} = 7.8 m/s\\t = 1.2s , g = -9.8 m/s^2\\h = 3.81 m[/tex]
c.
[tex]V^2 = V_{0} ^2 + 2g*d\\V_{0} = 7.8 m/s\\g= -9.8 m/s^2.\\d= 2.2-1.5 = 0.7 m\\V = 6.8 m/s[/tex]
d.
[tex]V^2 = V_{0} ^2 + 2g*h\\V_{0} = 0\\g = +9.8 m/s^2.\\h = 6.8 m\\V = 27.05 m/s[/tex]
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Consider the diagram of a pendulum's motion shown above. A pendulum can be used to model the change from potential energy
to kinetic energy and back to potential energy. Locate the place in the diagram where kinetic energy is the greatest.
A.point A
B.point B
C.point c
D.both points A and B
Answer: D
Explanation: Potential stores Kinetic Energy so, Point C will have Kinetic turned into Potential.
Answer: the answer is D
Explanation:
I NEED THE RIGHT ANSWER ASAP IT NEEDS TO BE 100% ACCURATE NO LINKS!!! Which type of force will an object move towards?
1: weakest
2: net
3: balanced
4: strongest
this is a Science question
Answer:
Strongest
Explanation:
Weak forces do not possess significant strength to pull an object. Net forces is the sum of all forces acting on an object. Balanced forces cancel each other out to have no pull whatsoever. S
Explain how pressure can be used to
change the state of matter
Answer:
Physical conditions like temperature and pressure affect state of matter. ... When the pressure exerted on a substance increases, it can cause the substance to condense. Decreasing pressure can cause it to vaporize. For some types of rock, decreasing pressure can also cause them to melt.
what does auxiliary heat mean on a honeywell thermostat
Answer: Aux Ht or Auxiliary heat is the backup heat that turns on to help the compressor for first stage maintain your temperature setting. ... When the thermostat is in this position the compressor does not run, only the Emergency heat runs
Explanation:
What does auxiliary heat mean on a Honeywell thermostat.
Answer:What does aux heat mean on a Honeywell system? Short for auxiliary heat, this system is designed to heat your home up quickly instead of waiting for the cold heat pump on the exterior of your home. Unfortunately, using the auxiliary heat is significantly more expensive than using your heat pump.
Explanation:Aux on the thermostat stands for auxiliary heat. Auxiliary heat is the electric heat strip in your air handler that is supplemental heat. Emergency heat is the same thing as auxiliary heat. Auxiliary heat/ Emergency heat help the heat pump keep up when cold outside or the temperature differential on the thermostat is large.
whats the answer
----------------------------
Answer:
repel each other
Explanation:
The magnitude of the charge of an electron is called... ... If a positively-charged glass rod is suspended so that it turns easily and another positively-charged glass rod is brought close to it, the two rods will... Repel each other.
The ………………………. is the substance/material travels through
1. Energy
2. Medium
3. Transverse
4. Longitudinal
Answer:
energy
Explanation:
the energy is the substance
Answer:
Medium
Explanation:
Why does the magnitude of the resultant force increases once the box start moving?
proportional to the variation of the linear momentum
(hope this helps) :)
you push on box g that is next to box h, causing both boxes to slide along the floor, as shown in the figure. the reaction force to your push is
The reaction force to your push is the push of box G against you.
Newton's third law states that:
For every action, there is an equal opposite reaction.
So if an object x pulls or pushes an object y with a certain force, object y also exerts an equal and opposite force on object x.
Now, if you should push box G with a certain force, box G will exert an equal opposite force on you.
Hence, the reaction force to your push is the push of box G against you.
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a bubble of air of volume 1cm^3 is released by a deep sea diver at a depth where the pressure is 4.0 atmospheres. assuming its temperature remains constant (T1=T2), what is its volume just before it reaches the surface where the pressure is 1.0 atmosphere?
Answer:
hope this helps!
Explanation:
Volume of the air bubble, V1=1.0cm3=1.0×10−6m3
Bubble rises to height, d=40m
Temperature at a depth of 40 m, T1=12oC=285K
Temperature at the surface of the lake, T2=35oC=308K
The pressure on the surface of the lake: P2=1atm=1×1.103×105Pa
The pressure at the depth of 40 m: P1=1atm+dρg
Where,
ρ is the density of water =103kg/m3
g is the acceleration due to gravity =9.8m/s2
∴P1=1.103×105+40×103×9.8=493300Pa
We have T1P1V1=T2P2V2
Where, V2 is the volume of the air bubble when it reaches the surface.
V2=
The Red one is wrong also the blue mark means nothing
Answer:
it is c
Explanation:
the car is moving back to its original position
From rest, a car accelerates to 4.2 m/s2 for 10 seconds before winning the race. How far did it run?
Write the final answer in complete sentence.
Answer:
[tex] s = ut + \frac{1}{2} a {t}^{2} \\ u = 0 \\ a = 4.2 \: m {sec}^{ - 2} \\ t = 10sec \\ s = 0 + \frac{1}{2} (4.2) {10}^{2} \\ = 1.2 \times 100 \\\boxed{ s = 120 \: m}[/tex]
Please help me. Brainiest to the correct answer.
A computer uses 40W of power. Calculate the current it draws when connected to a 230V mains supply.
Answer:
0. 174 A
Explanation:
This is similar to your other question
[tex]\boxed{\mathfrak{Power(P)=Voltage(V) \times Current(I)}}[/tex]
Voltage (V) = 230 VPower (P) = 40 W=> 40 = 230 × I
=> [tex]\mathsf{I=\frac{40}{230} }[/tex]
=> I = [tex]\mathsf{\frac{4}{23} }[/tex]
=> I = 0.174 A
I is the current, the computer draws when connected to a 230 V mains supply, and it's SI unit is Amperes.
[tex]\mathfrak{\overline{There\: you \: are!}}[/tex]
What is an example of a chemical change
Answer:
Hello, Rotting, burning, cooking, and rusting are all further types of chemical changes because they produce substances that are entirely new chemical compounds. For example, burned wood becomes ash, carbon dioxide, and water. When exposed to water, iron becomes a mixture of several hydrated iron oxides and hydroxides.
Explanation:
I hape this helps remember to make someone smile today
Why does the sun have an up and down motion in the sky?
Answer:
The sun stays in its position at the center of our solar system. It doesn't rise and set. But it appears to rise and set because of the Earth's rotation on its axis
Explanation:
Hope this helps :)
write the energy conversion when climbing a ladder
What is the power of a diverging lens of focal length 0.4 m
a) 2.5
b) 3.5
c)-3.5
d)-2.5
Answer:
-2.5 is the answer to your question
Tell me the answer what will be in blanks
Answer:
what do you mean by blanks??
Explanation:
i don't get
it
Answer:
ikoon
Explanation:
i think so it ikoon
Explain how a book can have energy even if it is not moving.
Help asap please thank you
Answer:
1. 5 m/s
2. 5 m/s/s
Explanation:
1. 50 - 5 = 45
45/9 = 5
2. 25 - 0 = 25
25/5 = 5
hope this helps!
Jonathan in his motorcycle is going 70 miles per hour. How long would he take to go to a city 200 miles away?
Answer:
28.57 hoursExplanation:
The time taken by the motorcycle to reach the city can be found by using the formula
[tex]t = \frac{d}{s} \\ [/tex]
d is the distance
s is the speed
From the question
d = 200 miles
s = 70 miles / hour
We have
[tex]t = \frac{200}{7} \\ = 28.571428 \\ [/tex]
We have the final answer as
28.57 hoursHope this helps you
How does the mass of an object affect its acceleration?
Answer:
as the mass of an object is increased, the acceleration of the object is decreased & vice-versa.
Explanation:
hope this helps!
if a dolphin swims at 15 m/s for 30 seconds, how far would the dolphin swim?
A 1200kg car traveling at a speed of 29 m/s drives horizontally of a 90m cliff the potential energy is=
Answer:
Sketch the situation.
b. Calculate the potential energy, the kinetic energy, and the total energy of the car as it leaves the cliff.
c. Make a graph displaying the kinetic, gravitational potential, and total energy of the car at each 10 m
increment of height as it drops
Explanation:
The potential energy of the car at that position is 10.6 x 10⁵ J.
What is meant by potential energy ?Potential energy of an object is defined as the energy acquired by the object by virtue its position.
Here,
Mass of the car, m = 1200 kg
Speed of the car, v = 29 m/s
Height of the cliff, h = 90 m
Therefore,
Potential energy of the car, PE = mgh
PE = 1200 x 9.8 x 90
PE = 10.6 x 10⁵ J
Hence,
The potential energy of the car at that position is 10.6 x 10⁵ J.
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Interpret the data:
Make a claim that answers the scientific question.
I WILL MARK YOU IF YOU HELP
An object has a mass of 3.8 kg and a force of 11.6 N is applied to it. What is the acceleration that results?
A car travels 5 km towards north than turns right and travels 3km further, the car again turns right and travel 1 km and comes to rest. What is the
distance travelled and displacement of the car ?
why is the pressure in the bottom of the pacific ocean much bigger than near the surface
Answer:
increase in hydrostatic pressure
Explanation:
he force per unit area exerted by a liquid on an object. The deeper you go under the sea, the greater the pressure of the water pushing down on you. For every 33 feet (10.06 meters) you go down, the pressure increases by one atmosphere .
Brainliest pls
I forgot to post the pic
But please help
just need answers
Answer:
1.127,56,000m
2. 347,600,000
3. 384,000
4. 200000000
5. 16,000,000cm
6. 36,000,000cm
7. 125,000m long, 400m deep, 1,500m wide
8. 11.18km/sec
9. 5,400,000
10. 2g
11. 1,200 mg to 2700 mg
12. 158000 kg
13. 450000000 mg
14. 23,000g to 90,000g
15. 40,000 ML
16. 1,000 ML
17. 26,600 KL
18. 1,558,000 L
19. 60 ML
20. 0.947
Where are the field poles mounted on an alternator
A. Load
B. Shaft
C. Exciter
D. Rotor
Explanation:
(D) i think there you go have a good day
how long does it take for a pap smear to come back