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beks73 [17]
3 years ago
7

Watch Bill Nye the Science Guy wave and I will make you brainlist yes and I will give you 25 points and pls do the notes

Physics
1 answer:
Anvisha [2.4K]3 years ago
3 0

Answer:

Bill bill bill bill

Explanation:

Omigosh you brought me back to my childhood.

(still watching it rn and will take notes)

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A 75.0 kg object decelerates from a speed of 100 m/s to 50 m/s over an interval of 25 seconds. What was the net force acting upo
lukranit [14]

Assuming constant acceleration <em>a</em>, the object has undergoes an acceleration of

<em>a</em> = (50 m/s - 100 m/s) / (25 s) = -2 m/s²

Then the net force has a magnitude <em>F</em> such that, by Newton's second law,

<em>F</em> = (75.0 kg) <em>a</em>

<em>F</em> = (75.0 kg) (-2 m/s²)

<em>F</em> = -150 N

meaning the object is acted upon by a net force of 150 N in the direction opposite the initial direction in which the object is moving.

7 0
3 years ago
A ball rolls onto the path of your car as you drive down a quiet neighborhood street. To avoid hitting the child that runs to re
Ilya [14]

Answer:

a) F = -1035.385 N

b) Backwards

c) s = 15.60 m

Explanation:

Given information

u = Initial Speed of Car = 15.0 m/s

v = Final Speed of Car = 9.00 m/s

t_{b} = Breaking Time = 1.30 s

m = Mass of Car = 1040 kg

Part (a)

To find the force exerted on the car we use the following formula

F = ma

Where

F = Force = unknown

m = Mass of Car = 1040 kg

a = Acceleration of Car / Deceleration of Car = unknown

To find the force (F) we need to first find the deceleration rate (a)

To find the deceleration rate we use the following formula

a = \frac{v - u}{t}

Inputting the given values

a = \frac{15 - 9}{1.30} \\ a = -4.615

To find the force

F = ma \\ F = (1040)(-4.615) \\ F = (1040)(-4.615) \\ F = -1035.385 N

Part (b)

Since the value of F is negative this means the the force was opposite the direction of motion, hence the force was backwards.

Part (c)

To find the total distance the car moved while braking we use the following formula

v^2 = u^2 + 2as

Where

s = distance traveled

Inputting the values given

(9)^2 = (15)^2 + 2(-4.615)s

s = 15.60 m

6 0
3 years ago
Make a list of nutrients found in packed items and amount of nutrient present in them
mezya [45]

Nutrients found in packed items include carbohydrates, fats and proteins and the amount of nutrients present in them is found in calories/grams.

<h3>What are macronutrients?</h3>

Macronutrients are nutrients that contain calories that must be consumed in the diet to perform metabolic functions.

These macronutrients are specified in packed foods, and include proteins, carbohydrates and lipids.

Macronutrients provide 4 calories (proteins and carbohydrates) or 9 calories per gram (fats).

In conclusion, nutrients include carbohydrates, fats (lipids) and proteins and their proportions are expressed in grams.

Learn more about macronutrients here:

brainly.com/question/3313290

#SPJ1

3 0
2 years ago
What is angle of dip​
DENIUS [597]

<em>Angle of Dip is the angle in the vertical plane aligned with magnetic north (the magnetic meridian) between the local magnetic field and the horizontal.</em>

8 0
3 years ago
The radius RH of a black hole, also known as the event horizon, marks the location where not even light itself can escape from t
olga nikolaevna [1]

Solution:

a) We know acceleration due to gravity, g = GM/r²

Differential change, dg/dr = -2GM/r³

Here, r = 50*Rh = 50*2GM/c² = 100GM/c ²

My height, h=dr = 1.7 m

Difference in gravitational acceleration between my head and my feet, dg = -10 m/s²

or,   dg/dr = -10/1.7 = -2GM/(100GM/c²)³

or,     5.9*100³*G²*M² = 2c⁶

or,   M = 0.59*c³/(1000G) = 2.39*1032 kg = [(2.39*1032)/(1.99*1030 )]Ms = 120*Ms

Mass of black hole which we can tolerate at the given distance is 120 time the mass of Sun.

b) This limit an upper limit ,we can tolerate smaller masses only.

4 0
3 years ago
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