A stunt man projects himself horizontal from a height of 60m. He lands 150m away from where he was launched. How fast was he launched?
A.) 54.87 m/s
B.) 43.98 m/s
C.) 47.46 m/s
D.) 42.87 m/s

Answer:

speed

Explanation:

because speed is fast

Answer: Speed

Explanation:

Answer:

a variable (often denoted by x ) whose variation does not depend on that of another.

Answer:

If 20 = 5 (x-10)

so 20= 5x-50

20+50= 5x

70=5x

x=70/5

so x=14

Explanation:

Liquids and solids are often referred to as condensed phases because the particles are very close together.

Answer:

b) They will have the same accelerationExplanation:

The acceleration of an object in free fall is known as the acceleration due to gravity, g, which is due to the attractive force of the Earth's gravitational field on the object. and is given by the following formula;

[tex]g = G \times \dfrac{Mass \ of \ the \ Earth}{(Distance \ between \ the \ object \ and \ the \ center \ of \ the \ Earth)^2}[/tex]

[tex]g = G \times \dfrac{M}{r^2}[/tex]

r = R + h

Where;

R = The radius of the Earth

h = The height of the center of the object above Earth's surface

Therefore, due to the large magnitude of R, and the comparatively small magnitude of h, R + h is approximately R, that is R + h ≈ R and R ≈ r, which gives;

[tex]g = G \times \dfrac{M}{R^2}[/tex]

Therefore, given that, the mass of the Earth, M, the radius of the Earth, R and the gravitational constant, G, are all constant, the value of g is therefore, constant for all objects and the value is approximately 9.81 m/s².

Answer:

a = - 25 m/s²

Explanation:

The magnitude of acceleration or deceleration of an object can be found by using the third equation of motion as follows:

2as = Vf² - Vi²

where,

a = magnitude of acceleration = ?

Vf = Final Velocity = 15 m/s

Vi = Initial Velocity = 25 m/s

s = distance traveled = 8 m

Therefore,

2a(8 m) = (15 m/s)² - (25 m/s)²

a = (- 400 m²/s²)/(16 m)

a = - 25 m/s²

Here negative sign indicates deceleration

Answer: Renewable Resource

Explanation: There isn't a limited supply of water, which makes it a renewable resource.

Answer:

in my view water is the combination of oxygen (1) part and hydrogen (2) part

Answer:

2.63 %.

Explanation:

Given that,

The calculated value of the specific heat of water is 4.29 J/g.C

Original value of  specific heat of water is 4.18 J/g.C.

We need to find the student's percent error. The percentage error in any quantity is given by :

[tex]P=\dfrac{|\text{original value-calculated value}|}{\text{original value}}\times 100\\\\P=\dfrac{4.29-4.18}{4.18}\times 100\\\\P=2.63\%[/tex]

So, the student's percent error is 2.63 %.

Answer:

c

Explanation:

Answer:

25.98

Explanation:

right answer

The horizontal displacement of the projectile is 25.98 m.

The given parameters;

angle of projection Ф = 30°

initial velocity of the projectile, u = 15 m/s

time of motion, t = 2 seconds

The horizontal displacement of the projectile is calculated as follows;

[tex]X = v_0_x \times t\\\\X = v_0 cos (\theta) \times t\\\\X = 15\times cos (30) \times 2\\\\X = 25.98 \ m[/tex]

Thus, the horizontal displacement of the projectile is 25.98 m.

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Answer:

x = 10

Explanation:

215 = 25x – 35

215 + 35 = 25x

250 = 25x

x = 250 / 25

x = 10

Answer:its a physical change as state of matter changes without any reactions

Explanation:when a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition. Although we call them physical "reactions," no reaction is actually occurring

Answer:

91.44 meters or 300 feet

Answer:

100 yards

Explanation:

If comparing from actual playing field between the goal posts. Add another 10 yards for end lines. Making it 120 yards in length.

Answer:

correct answers C

Explanation:

the electric field is derived from Coulomb's law, where the charge has been assumed to be positive.

The expression remains

         F = k q₁ q / r²

the electric field is

         Fe = (k q₁ / r²) q

The amount between parentises rs constant

by checking the correct answers C

Answer:

1c 2a 3b  

Explanation:

Credit: Larus (Full Credits to Larus I didn't make this answer)

The correct answer is that it is too high for the weather balloons.  

The mesosphere refers to the layer of the atmosphere of the Earth. It is present directly above the stratosphere and below the thermosphere. It elongates from about 50 to 85 kilometers above the Earth. The coldest temperatures in the atmosphere of the Earth, that is, around -90 degree C, is found close to the top of the layer.  

It is tough to study mesosphere, therefore, less is known about the layer of the atmosphere in comparison to the other layers. It is tough as weather balloons cannot fly high enough to reach the mesosphere. The satellites orbit above the mesosphere, and cannot directly determine the traits of the layer.  

Answer:

9.81 N

Explanation:

Given that a baseball weighs 1 kg. The pitcher throws the ball at a velocity of 10 m/s straight up. Neglecting air resistance. The maximum height reached will be calculated by using the formula

V^2 = U^2 - 2gH

U = 10 m/s

g = 9.8m/s^2

At maximum height, V = 0

Substitute u and g into the formula

0 = 10^2 - 2 × 9.8 × H

19.6H = 100

H = 100/19.6

H = 5.1 m

The Kinetic energy on the ball will be

K.E = 1/2mv^2

K.E = 1/2 × 1 × 10^2

K.E = 1/2 × 100

K.E = 50 J

But energy = work done

WD = Force × distance (height)

The force that acts on the baseball when it is HALF WAY to the top of the path will be

F × 5.1/2 = 50

F = 100/5.1

F = 19.61 N

The weight acting downward will be

W = mg

W = 1 × 9.8

W = 9.8 N

The net force acting on the ball will be

Net force = F - W

Net force = 19.61 - 9.8

Net force = 9.81 N

Therefore, the net force that acts on the baseball when it is HALF WAY to the top of the path is 9.81 N

Answer:

Speed

Explanation:

Hope this helps!

Producers are responsible for making all types of matter in living and non-living things in an ecosystem.

An ecosystem may be defined as a place or area where members of different species live together and interact with one another for the purpose of food, shelter, and space.

Producers are organisms which always found at the bottom of each trophic level of an ecosystem. These organisms synthesize their own food and energy from carbon dioxide in presence of sunlight.

After synthesizing energy, they transform their energy to higher trophic levels. Apart from this, several biotic and abiotic factors are also responsible for making up the type of matter in living and nonliving things in an ecosystem.

Therefore, producers are responsible for making all types of matter in living and non-living things in an ecosystem.

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Answer:

Explanation:

VR ( Velocity ratio ) is the ratio of displacement to effort of load. So it is obvious that displacement takes place. Frictional force cannot change the displacement as it only an opposing force. So VR is not affected by friction.

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Answer:

because VR is velocity ratio

Answer:

sodium

Explanation:

Answer:

sodium

Explanation:

Answer:

30 m/s

Explanation:

Given:

v₀ = 0 m/s

a = 3.0 m/s²

t = 10 s

Find: v

v = at + v₀

v = (3.0 m/s²) (10 s) + 0 m/s

v = 30 m/s

Answer:

1. 160

2. 0

3. 120

Explanation:

Answer:

Your answer should be d: Foot

Explanation:

The unit "foot" is part of the english system which includes inches, feet, yards, etc.

Answer:

Explanation:

If an elements atomic mass and number are known you can also determine the number of protons and neutrons it has. You can also determine where it is on the periodic table. For example, if a element had a atomic mass of 10 then it would be higher up on the table then one with a mass of 20. Btw I do apex too.

Answer:

This is equal to 1.9 kilometers.

Explanation:

For every foot it is 0.0003048 so multiply this number by 6500 and get your answer. Hope this helps have a good day

Answer:

diplacement will be 2

2. distance will be 6

displacement will be 2

The distance if we move 4 meters north and 4 meters south is 6 meters whereas, the displacement is 2 m. The same for the movement of  2 meters east and 4 meters west.

Distance is a physical quantity that measures how far we travelled from rest. It is the total length of the ways we moved. Distance is a scalar quantity. Displacement is a vector quantity showing the distance magnitude as well the direction.

If a person moves equal distances in opposite directions, then the displacement will cancel each other as in the case of force and the net displacement is zero.

Here, if move  4 m north and 2 meters south, the total distance is their sum , i.e., 6 meters. But the displacement for the opposite directions cancel in magnitude and the net displacement is 4-2 = 2 meters.

The same is applied for east and west movement. Hence, the distance is 6 m and displacement is 2 m.

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Answer:

4?

Explanation:

Hi There, Buddy!

To solve this problem, let us divide the entire motion into 2 phases

1.) When the elevator is moving with an acceleration

2.) When the elevator has a deceleration

For the first half -

u = 0 , a = 0.6 , t = t1

v = 0.6(t1)  ---------- ( 1 )

s = 1/2 x 0.6 x (t1)^2 = 0.3(t1^2) -------- ( 2 )

For the second half -

u = 0.6(t1) , a = -0.8 , v = 0

0.6 x (t1) = 0.8 (t2) ----> 3(t1) = 4(t2) ---------- ( 3 )

0.36(t1)^2 = 1.6 s2 ---------- ( 4 )

Now, we know that the total time taken is 10 seconds

------- t1 + t2 =10 , 3t1 = 4t2 ---- t1 = 40/7 , t2 = 30/7

Now, substitute values of t1 and t2 in s1 and s2 and add both s1 and s2 to get total distance travelled.

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