Answer:
10s
Explanation:
Classic accelerated motion question. The formula giving us the distance traveled given intial speed and time taken is:
[tex]\Delta x = v_0\Delta t +\frac12 a (\Delta t)^2[/tex]
We know the acceleration, we know the initial speed (it was at rest, so it's zero), let's replace and solve:
[tex]400 = 0 \Delta t + \frac 12 (0.5) (\Delta t)^2 \rightarrow 100 = (\Delta t)^2\\\Delta t = 10s[/tex]
a car traveling at 60m/s accelerates at 2 m/s for 30s.calculate how far it has traveled during this time
Answer:
2,7 km
Explanation:
You should remember from theory that
[tex]s=s_0 + v_0\Delta t + \frac12 a(\Delta t)^2[/tex]. Let's substitute values, remembering that we are interested in the difference in position [tex]\Delta s = s-s_0[/tex]
[tex]\Delta s = 60(30) +\frac12 2 (30)^2 = 2700m[/tex]
Answer:
it's average acceleration is 12 mph
Which of the following statements supports the claim that a planet travels around a star in an elliptical orbit? (1 point)
Every 30 days, the area swept in space by the planet is the same.
Every 30 days, the distance traveled by the planet is different.
Every 30 days, the speed the planet is moving is different.
I only
I and II
II and III
I, II, and III
Answer:
A
Explanation:
if it was in the same place it wold be a pattern which is what is usually seen in orbits
Which two forces operate over the longest distances?
A. Gravitational and weak nuclear
B. Electromagnetic and weak nuclear
C. Gravitational and strong nuclear
D. Electromagnetic and gravitational
Answer:
D Electromagnetic and gravitational
What is the net force on a water bottle?
Answer:
if it is not moving it is zero, like all things that aren't in motion
Explanation:
Answer:
Note that net force on the bottle is zero.
Explanation:
how far from the base of the cliff would the driver have landed if the driver initially had been moving horizontally with speed 10 m/s?
Answer:
C
Explanation:
y0=100 m
y=0
x0=0
x=?
v0x=10 m/s (moving horizontally)
v0y=0
x=x0+v0xt
x=10t
y=y0+1/2at^2
solve for t
0=y0-1/2gt^2
(a is acceleration which is - gravitational acceleration )
t=[tex]\sqrt{\frac{2y0}{g} }[/tex]
plug into x equation
x=10([tex]\sqrt{\frac{2y0}{g} }[/tex]) where y0=100m and g=9.80 m/s^2
x= 45.2 m
if you check the distance when v0=5 m/s, we get x=22.5 m so the equation is correct. however if the g your class uses is 10.00 m/s^2, then we get x=22.4 for the first velocity and 44.7 for the second velocity
A net force of magnitude 0.6 at on a body of mass 40g intially at rest. calculate the magnitude of the resulting acceleration
→ 0.6 N = 0.04 kg × a
→ 0.6 kg.m/s² ÷ 0.04 kg = a
→ 15 m/s² = a
Therefore, tha magnitude of resulting acceleration is 15 m/s².
How much force is needed to accelerate a. 15 kg mass at 20 m/s2.
Answer:
F = 300 N
Explanation:
This is an example of Newton's second Law
F = m * a
F = ?
m = 15 kg
a = 20 m^2
F = 20 * 15
F = 300 Newtons.
Can you please help the question is in an attatchment
Answer:
b because it's b so pick b
7. A car is
speeding up
with a force of
a
120 N, heading
East. The
force of
friction acts
against the car
with a force of
80 N West.
What is the net
force?
Answer:Fricition
Explanation: It is fricition in the net force
A car is speeding up with a force of 120 mph and heading east. The force of friction acts against the car with a force of 80 N westward, and the net force acting on the car is 40 N eastward, which means the car is accelerating eastward with a force of 40 N.
What is the calculation of net force?To calculate the net force acting on the car, one needs to consider the direction and magnitude of the forces acting on it. A force of 120 N to the east is acting to accelerate the car in that direction, and a force of 80 N to the west is acting to oppose the motion of the car.
Net force = force of acceleration -force of friction.
Net force = 120 N east- 80 N west.
Net force = 40 N East
Hence, the net force acting on the car is 40 N eastward, which means the car is accelerating eastward with a force of 40 N.
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Please help me please be correct.
Answer: A
Explanation: They would not be planting weeds or digging up the tree, the person on the left in the picture is pouring water on the tree implying that they are taking planting it.
What is the name of a hypothesis that has passed the test of many experiments and has support of other scientists
Answer: Scientific Hypothesis
Explanation: A scientific hypothesis is something supported or approved by a line of scientists through experiments and close observations.
Question 10..help me
Answer:
Go to high ground, as high as possible.
If the 10v battery were replaced by a 15v battery would the current through the 70-ohm resistor increase decrease or remain the same?
Answer:
I think it would increase sorry if I'm wrong
A 800 Kg car and driver accelerates at a rate of 35 m/s/s. What force is necessary to bring the car to a complete stop?
Answer:
Your answer would be 28,000 N (newtons).
Explanation:
We'd simply get this by using the formula:
force = mass × acceleration
The information that we have from the question is that the force is 800 times 35.
Now, all we have to do is multiply 800 by 35, and we have our answer of 28,000 N.
I hope I helped, and a Brainliest is always appreciated! ☺
A block weighing 10 newtons is on a ramp inclined at 30° to the horizontal. A 3-newton force of friction acts on the
block as it is pulled up the ramp at a constant velocity. The force applied to pull the box up the ramp acts parallel to the
incline. Draw the FBD for this problem and determine the magnitude of the force applied.
The force applied to pull the box up the ramp acts parallel to the incline is 8N
The force applied to pull the box is expressed as:
[tex]F_N = F_m + F_f[/tex]
Fm is the moving force
Ff is the force of friction
Get the moving force and frictional fice
[tex]F_m = 10sin30^0 = 5N\\F_f = 3N[/tex]
The force applied to pull the box up the ramp acts parallel to the incline = 5N + 3N = 8N
Hence the force applied to pull the box up the ramp acts parallel to the incline is 8N
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is the following statement true or false? the light wave from a bulb is an example of a periodic wave.
Answer:
true
Explanation:
PLEASE ANSWER NEED HELP!!!!!!!! PLEASE THE CORRECT ANSWER!!!!!!
Maurice spends a lot of time watching television and films. He can’t help but notice that the men in the action movies that he loves are always very toned. He goes to the gym a few times a week, but his abs are nowhere near what he sees in these shows. What is the BEST advice for Maurice?
A.
He should recognize that celebrities often present unrealistic body images.
B.
He must weigh the positives of this kind of entertainment against the negative.
C.
He needs to spend hours every day like celebrities do to get the body he wants.
D.
He should stop watching this kind of media all together since it creates problems.
PLEASE NO LINKS
Answer:
A
Explanation:
The best advice for Maurice is he should recognize that celebrities often present unrealistic body images. The correct option is A.
What is advice?A suggestion made to you by someone regarding what to do or how to act in a specific circumstance: Steven offered me some wise counsel. I believe I will heed your counsel and purchase the green dress. Can I offer you some advice? I require assistance choosing a PC.
Body Dysmorphic Disorder is a condition where “imagined ugliness” is present. People who have this disease perceive a wildly distorted version of themselves when they look in the mirror.
These people frequently spend hours scrutinizing, trying to hide, or worrying about their perceived shortcomings.
Therefore, the correct option is A. He should recognize that celebrities often present unrealistic body images.
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According to Boyle's law, as volume decreases, pressure ____________ , and as volume increases, pressure ____________ .
Answer:
In chemistry, according to Boyle's law it tells us that the pressure and volume of an ideal gas are inversely proportional. The pressure has an inverse relationship with the volume. As the volume increases two times, then the pressure of the gas decreases two times.
Explanation:
5 differences between mass and weight
Answer:
The mass is essentially "how much stuff" is in an object. ... Weight: There is a gravitational interaction between objects that have mass. If you consider an object interacting with the Earth, this force is called the weight. The unit for weight is the Newton (same as for any other force)
Explanation:
The length of a certain wire is kept same while its radius is doubled. What is the new resistance of this wire
Answer:
R = K L / A resistance proportional to length and inversely proportional
to area
R2 / R1 = A1 / A2 = A1 / (4 A1) = 1 / 4
R2 = R1! / 4
Giải câu 2 của bài tập trên
Answer:
LETTER C IS THE ANSWER
Explanation:
this is my answer
HELP PLEASE I KEEP ASKING THIS QUESTION BUT GET DIFFERENT ANSWERS EACH TIME!!!!!
Answer: a
The wagon appears as a red color because red light is reflected.
:)
whats the two factors that determine the amount of kinetic energy
Answer: mass and speed.
Explanation: The two main factors that affect kinetic energy are mass and speed. Why? Because the motion of an object depends on how fast it's traveling.
when drawing a scatter diagram, along which axis is the explanatory variable placed? along which axis is the response variable placed?
Question 11 (5 points)
If a force of 10.8 newtons is applied to an object that has a mass of 4.6 kg, what will
be the object's acceleration?
*Include ABBREVIATED units in your answer
*Round your answer to 1 decimal place
Answer:
2.3 m/s2
Explanation:
F = ma
a = F/m
a = 10.8 / 4.6
a = 2.3 m/s2
I hope this helps.
A kettle transfers 1,500 J of energy, 1,200 J to a thermal energy store and 300 J to a vibrational energy store (sound). How efficient is the kettle?
Answer:
[tex]\eta = 0.8 = 80\%[/tex]
Explanation:
Efficency of a machine is defined as the ratio of "useful" energy over the total energy imput in it. In this case a kettle wants to heat water, so thermal energy is what we need; if we wanted to build some kind of music instrument, we would be looking at the energy generating vibrations.
[tex]\eta = \frac{1200J}{1500J} = 0.8[/tex]
1) In which of these examples is the greatest movement occurring? A) A B) B C) C D) D
Answer:d
Explanation:
Which of the mathematical sign below would best complete the following statement?
Statement: 5cm______ km
A. >
B.<
C. =
PLS HELP AND NO LINKS
Answer:
B
Explanation:
option b stands for less down and cm is less than km
Calculate the maximum height a ball reaches when thrown straight up at a velocity of 10m/s
Answer:
5.1m
Explanation:
Use the fourth key equation of accelerated motion
vf^2=vi^2+2aΔd
we know vf is = 0 because that is when the ball reaches it's peak (not going up anymore)
0=vi^2+2aΔd
and we can rearrange for Δd, which is what you need
-vi^2=2aΔd
Δd = -vi^2/2a
Now we can plug in the values
Δd = -vi^2/2a
Δd = -(10m/s)^2/2(-9.8)
Δd = -100/-18.6
Δd = 5.10m
how much energy is needed to heat 2kg of cooking oil with a specific heat capacity of 2000j/kg°c from 20°c to 120°c
Answer:
400kj
Explanation:
h =mass × specific heat capacity × change in temperature
= 2×2000×[120-20]
=2×2000×100
=400000j
=400kj
400kj of energy is needed.
Energy:Energy, which is observable in the execution of labor as well as in the form of heat and light, is the quantitative quality that is transferred to a body or to a physical system in physics. Energy can be transformed in form but cannot be created or destroyed, according to the rule of conservation of energy. The joule, which is the energy supplied to an object by the labor of moving it a distance of one meter against a force of one newton, is the unit of measurement for energy in the International System of Units (SI).Cooking oil:Cooking oil is a liquid fat made of plants, animals, or synthetic materials that are used in baking, frying, and other cooking processes. It may also be referred to as edible oil because it is used in cold food preparation and flavoring, including salad dressings and bread dips.At room temperature, cooking oil is normally a liquid, although some saturated-fat oils, such as coconut oil, palm oil, and palm kernel oil, are solids.Solution -Formula - h = mass × specific heat capacity × change in temperature
So,
[tex]2[/tex] × [tex]2000[/tex] × [tex][120-20][/tex]
[tex]2[/tex] × [tex]2000[/tex] × [tex]100[/tex]
[tex]=400000j\\=400kj[/tex]
Therefore, 400kj of energy is needed.
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