The length of the girl's shadow is approximately 9.18 ft. The length of the shadow of a 5.3 ft-tall girl standing on level ground with the sun 30 degrees above the horizon, we can use the shadow length formula:
L = H / tan(a)
where L is the length of the shadow, H is the height of the object (in this case, the girl), and a is the angle to the source of light (in this case, the sun).
we can see that the formula for calculating the length of a shadow is given in. We can also see that the height of the girl is 5.3 ft and the angle to the source of light (the sun) is 30 degrees, as given in.
Plugging these values into the formula, we get:
L = 5.3 / tan(30)
L = 5.3 / 0.5774
L = 9.18 ft (rounded to two decimal places)
Therefore, the length of the girl's shadow is approximately 9.18 ft.
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a car starts from rest and reaches a speed of 20m/s in 5 second what is the acceleration of the car
Answer:
4m/s^2
Explanation:
a=v‒u/t (here v is final velocity &u is initial velocity)
a=20m/s‒0m/s/5s
a=20m/s/5s
a=4m/s^2
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Please help me with this please
I’ll mark you Brainly
Number 3
Explanation:
Since the gravity is pushing down on potatoes and the bag because of weight, the force is balanced. The gravity makes the bag point downward.
Put yourself in usual bolts running shoes-how would you feel about breaking your own world record ?
Answer:
Honestly if I broke MY OWN record, I would be shocked.
Explanation:
Breaking your own record means either nobody has succeeded your record therefor its still YOUR record, or nobody had thought to even try to break your record. It would be great to push yourself to further limits and break a record you once made. You should be very proud if you did, because not only did no one break your record yet, you broke it yourself.
If putting yourself in Usain Bolt running shoes, when you break your own record, it either means that no one has ever beaten it.
What is the world record by Usain Bolt?100 m in 9.58 seconds is the world record by Usain Bolt at the 2009 IAAF World Championships,
They predict that times will begin to plateau and that it will get harder and harder to beat the record.
Although the sub-nine seconds are on, they think: "It's safe to say that someone will break the nine-second barrier – not necessarily in our lifetime, but it will happen one day."
It would be fantastic to challenge yourself and surpass a previous record.
Therefore, if you did, you should be extremely proud because not only has no one else yet broken your record, but you also accomplished it yourself.
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How does a charge transfer from one object to another?
Answer:
Three ways electrons can be transferred are conduction, friction, and polarization. In each case, the total charge remains the same. This is the law of conservation of charge. Conduction occurs when there is direct contact between materials that differ in their ability to give up or accept electrons.
Explanation:
Answer:
Charge transfer by Conduction
Charge transfer by conduction using a negatively charged object.
Charge transfer by conduction using a positively charged object.
Charge transfer by induction using a positively charged object.
Explanation:
Give a physical description of radio waves and compare and contrast it with the frequency, wavelength, energy and wave speed with those of other regions of the EMS.
I need help asap!!!!
Answer:
C
Explanation:
Mass does not change with gravity, but weight DOES. Higher gravity means MORE weight.
predict the long term cost and benefit of using renewable or non renewable resources. please help will give brainliest
Answer:
The long term cost and benefit of renewable resources is that it is most likely a one-time purchase kind of thing. For example, if you use solar energy, you only have to buy the solar panels for your roof once. However, if you use gas oil to cook, you have to keep buying since it runs out. Sunlight doesn't run out.
The long term cost and benefit of non renewable resources is that it is something you can profit off of very easily. It will take a lot of time for people to completely switch over to renewable resources, so it is something that can steadily bring in money. Examples of non renewable resources that people constantly use is oil, gas, coal, etc.
Mr. Koskos brought a scooter to DHS so he could zoom around the halls while the building is empty. The scooter can accelerate at a rate of 45 m/s2. If Mr. Koskos started at 13 m/s, how much time did it take for him to shoot up to a final speed of 51 m/s?
Answer:
51m/s - 13m/s= 38m/s
38m/s÷45m/s²= 0/8
Explanation:
First we bring the difference in speeds to religion because this is the formula
Secondary speed - primary speed ÷ time
[tex] \frac{51 - 13} {45} =0.8[/tex]
Because we do not have a definite time, according to the division formula, we accelerate to get the time
How can I get better at Physics?
Answer:
by paying attention in class, studying and using notes on everything
Explanation:
What color of visible light has the highest energy?.
Which type of electromagnetic wave has the most energy?
A. Microwaves
B. Gamma rays
C. Radio
D. Visible light
Answer:
B Gamma-Rays
Hope this Helps! Please mark Brainliest!
Answer:
The answer is B. Gamma Rays.
Explanation:
I take AP EX lessons and quiz all the time.
2. A motorcycle starts at rest and moves a distance of 350 m. If it has a constant acceleration of 4.55m/s2, what is
its final velocity?
Answer:
Vf = ≈56.436 m/s
Explanation:
We'll need to use the equation:
Vf^2 = Vi^2 + 2aΔx
Plugging in what we know, we get:
Vf^2 = (0)^2 + 2(4.55)(350)
Finally, some algebra:
Vf^2 = 3185
Vf = ≈56.436
The weight of an object can be determined by multiplying the mass of the object by which of the following?
A) the object's velocity
B) the object's size
C) the object's change in speed
D) the object's acceleration due to gravity
Answer:
D.
Explanation:
Weight is determined using the formula [tex]w=mg[/tex] (m=mass, w-weight, g=gravity). In physics, weight is the force that gravitation exerts upon a body, equal to the mass of the body times the local acceleration of gravity.
The hubble telescope has helped confirm what about the universe?.
Answer:
Helped pin down the age for the universe now known to be 13.8 billion years, roughly three times the age of Earth. Discovered two moons of Pluto, Nix and Hydra. Helped determine the rate at which the universe is expanding. Discovered that nearly every major galaxy is anchored by a black hole at the centre.
Explanation:
Which force is represented by the arrow at
B?
A) Force of friction
B) Force of gravity
C) Tension force
D) Normal force
A is pulling the block straight down toward the center of the Earth, no matter what the slope of the plane may be. A is the force of gravity.
The directions of B and C both depend on the slope of the plane.
B is a force that's parallel to the plane, pulling the block UP the plane. B is the force of friction.
C is a force perpendicular to the plane, preventing the block from falling down through the plane. C is the normal force.
Answer:
A is pulling the block straight down toward the center of the Earth, no matter what the slope of the plane may be. A is the force of gravity.
The directions of B and C both depend on the slope of the plane.
B is a force that's parallel to the plane, pulling the block UP the plane. B is the force of friction.
C is a force perpendicular to the plane, preventing the block from falling down through the plane. C is the normal force.
Explanation:
Scientists think that birds and other animals, such as sea turtles, may use Earth’s magnetic field to help them navigate. Research which animals might find their way using Earth’s magnetic field and investigate the evidence scientists have found that supports the idea. What would happen to the animal if Earth’s magnetic field were reversed?
Answer:
Magnetoreception (also magnetoception) is a sense which allows an organism to detect a magnetic field to perceive direction, altitude or location. This sensory modality is used by a range of animals for orientation and navigation, and as a method for animals to develop regional maps
A charge of 6. 4 × 10–7 C experiences an electric force of 1. 8 × 10–1 N. What is the electric field strength? 1. 1 × 10–7 N/C 3. 6 × 10–6 N/C 8. 2 × 100 N/C 2. 8 × 105 N/C.
The electric field strength is defined as the ratio of electric force and charge. The electric field strength will be 2.8 ×10⁵ N/C.
What is electric field strength?The electric field strength is defined as the ratio of electric force and charge. The field's direction is determined by the direction of the force acting on the positive charge.
A positive charge produces a radially outward electric field, whereas a negative charge produces a radially inward electric field.
The given data in the problem is;
Q is the charge= 6. 4 × 10–7 C
E is the electric force=1. 8 × 10–1 N
The relation between the electrostatic force and the electric field due to a charge is given as:
[tex]\rm F_E=Q E \\\\ \rm E=\frac{F_E}{Q} \\\\ \rm E=\frac{1.8\times 10^{-1}}{6.4\times 10^{-7}} \\\\ \rm E=2. 8 \times 10^5\ N/C.[/tex]
Hence the electric field strength will be 2.8 ×10⁵ N/C.
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What is the mass of an object with a velocity of 24.1 m/s and a momentum of 28.3 kg m/s?
Answer:
1.17427...kg
Explanation:
Assumptions: no friction, no air resistance, no internal resistance, and it is 1 dimensional travel for velocity.
p=mv, where p is momentum, m is mass, and v is velocity
28.3=24.1(m)
divide both sides by 24.1
you get 1.174273859
Answer:
[tex]\boxed {\tt 1.17427386 \ kilograms}[/tex]
Explanation:
The formula for momentum is:
[tex]p=mv[/tex]
From this formula, we know that mass can be found by dividing the momentum by the velocity.
[tex]\frac{p}{v}=m[/tex]
The momentum is 28.3 kg m/s and the velocity is 24.1 m/s
[tex]p=28.3 \ kg \ m/s \\v=24.1 \ m/s[/tex]
[tex]\frac{28.3 \ kg \ m/s }{24.1 \ m/s} =m[/tex]
Divide. The meters per second or "m/s" will cancel each other out.
[tex]\frac{28.3 \ kg}{24.1} =m[/tex]
[tex]1.17427386 \ kg=m[/tex]
The mass of the object is 1.17427386 kilograms.
Which represents the order of the forces from weakest to strongest.
Force is studied by physics and according to it four fundamental forces are recognized at the quantum level ordered from weakest to strongest are: the gravitational force, the weak nuclear force, the electromagnetic force and the strong nuclear force.
What is force?It is that magnitude that affects a body and is responsible for changes in its state of motion, according to quantum mechanics ordered from weakest to strongest are:
Gravitational force is the force exerted by one mass on the other, being a weak force.Weak nuclear force is the force responsible for radioactive decay.Electromagnetic force is the force that affects electrically charged particles and has two directions (attraction-repulsion).Strong nuclear force is the force that keeps the nuclei of atoms stable, being stronger than the electromagnetic force.Therefore, we can conclude that four fundamental forces are recognized at the quantum level ordered from weakest to strongest are: the gravitational force, the weak nuclear force, the electromagnetic force and the strong nuclear force.
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________ is a force which is exerted by earth on the objects *
Answer:
force of gravity
Explanation:
i hope this helps and learn well
The sun accounts what percentage of mass in our solar system?.
Explanation:
The sun lies at the heart of the solar system, where it is by far the largest object. It holds 99.8% of the solar system's mass and is roughly 109 times the diameter of the Earth — about one million Earths could fit inside the sun.
Answer:
99.9%
Explanation: The sun is a major and significant part of our solar system and our daily life so it is 99.9%.
1. A box with a mass of 6 kilograms is pushed with a net force of 10N to
the right on a frictionless surface. Calculate the acceleration of the box. *
Answer:
[tex]a=1.67\ m/s^2[/tex]
Explanation:
Given that,
Mass of the box, m = 6 kg
The net force acting on the box, F = 10 N
We need to find the acceleration of the box. We know that the force acting on an object is given by :
F = ma
a is the acceleration of the box,
[tex]a=\dfrac{F}{m}\\\\a=\dfrac{10\ N}{6\ kg}\\\\a=1.67\ m/s^2[/tex]
So, the acceleration of the box is [tex]1.67\ m/s^2[/tex].
F
F
A
a
a
F
F
F
D
E
Order greatest to least
Answer:
E B D A C F
Explanation:
Answer:
E B D A C F
Explanation:
A person with a mass of 60.0 kg is traveling at 18 m/s.
How much kinetic energy does this person have?
Kinetic energy
K = 1 /2 m v ²
= 1 /2 × 60 × 18² = 9720J
What is the mass of an object that accelerates at "-1.56m/s" when pushed leftwards by a force of 300 N and has an opposing frictional force of 169 ?
A roller coaster travels 18.0 m at an angle of 13.0° above the horizontal. How far does it move horizontally? Answer in units of m.
Answer:
here is an example
try to solve by this
→
x
=
126
∠
10
,
28
∘
m
Explanation:
Drawing the sketch and filling in all the data, we observe that it is a closed triangle where the cosine rule is valid to find the required side for the magnitude of the displacement.
This yields :
x
2
=
85
2
+
45
2
−
2
(
85
)
(
45
)
cos
150
∘
Solving we get
x
=
126
m
Then to find the direction of the displacement, we may use the sine rule or the cosine rule in the same triangle to yield that the angle of displacement from the horizontal is
10
,
28
∘
.
We discussed five indicators of a chemical change. Which was not one of these? Group of answer choices Formation of a precipitate Color Change Formation of a gas Change of temperature Phase change Production of an odor
gimme em points boi i wan't em gasses
What’s the answer to this question? Is it C?
The Lazarus mission was ___ years ago?
It takes _____ years to get to Saturn from earth.
Answer:
10 years ago
8 years
Explanation:
At its closest, Saturn is 1.2 billion kilometers away from Earth. So with today's spacecraft technology, you'll need about eight years to make the trip.
A ball is thrown straight up. As it is rising
Answer:
B.
Explanation:
When a ball is thrown vertically upward, the acceleration due to gravity always acts downward to the ball. When the ball is moving up the acceleration due to gravity will decrease
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