As a 5.0 x 10^2 newton basketball player jumps from the floor up toward the basket, the magnitude of the force of her feet on the floor is 1.0 x 10^3 newtons. As she jumps, the magnitude of the force of the floor on her feet is1) 5.0 x 10^2 N
2) 1.0 x 10^3 N
3) 1.5 x 10^3 N
4) 5.0 x 10^5 N

Answers

Answer 1

Answer:

Answer:

2) 1.0 x 10^3 N

Explanation:

As a 5.0 x 10^2 newton basketball player jumps from the floor up toward the basket, the magnitude of the force of her feet on the floor is 1.0 x 10^3 newtons. As she jumps, the magnitude of the force of the floor on her feet is

1) 5.0 x 10^2 N

2) 1.0 x 10^3 N

3) 1.5 x 10^3 N

4) 5.0 x 10^5 N

The answer is B , because from newton's third law of motion which states that action and reaction are equal and opposite.

so the reaction of the floor on her leg will be equal to the the magnitude of her feet on the floor, this will hold if the floor does not collapse.

Answer 2

Answer: I believe the answer is (4) The reason that is, is because if the exponents are the same like 10^2 and 10^3, you can add them. Then you would get 10^5. You can go ahead though and multiply 5.0 and 1.0. Now remember that with decimals you don't need the zeros behind the decimal point. So that simplifies it with just 5 x 1. Leaving you with 5.0 x 10^5.

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What would happen if a person who is wearing a heavy winter jacket were to place a thermometer inside the jacket next to his or her skin? What would happen if we took the same jacket, after it had been hanging in a closet, and placed a thermometer inside?

Answers

Answer:

Explained.

Explanation:

Let me explain the two cases in by one.

(1) When Person wearing a jacket, heat from his or her body is going to get trapped inside his or her jacket to keep this person warm when a thermometer is placed inside, it would indicate a higher temperature on the scale.

(2) When Jacket is Hanging in a closet, its temperature would be roughly close to room temperature and when we would place a thermometer it would not indicate any change on its scale.

A ball is dropped from a height of 16 feet. Each time it drops h feet, it rebounds 0.81h feet. Find the total distance traveled by the ball.

Answers

The first drop makes the ball travel 16 m.
Then the maximum height decreases to 16 x 0.81
And the distance traveled is twice the distance traveled.
If we make a pattern, this forms a geometric progression in which the common ratio is 0.81 and the first term is 16.
The sum of this series: a / (1 - r)
= 16 ( 1 - 0.81)
= 84 feet
This is the upward height, and the ball returns every time so:
Total distance = 84 x 2
= 168 feet

Two shoes each have a mass of 0.1 kg. if the are .15m apart what is the gravitational force between them? G = 6.67 x 10^-11 N (m/kg)^2

Answers

Formula:

$F = G \cdot (m_1 m_2)/(r^2)$

m1, m2 - mass in kg
r - distance in meter.

m1 = m2 = 0.1kg
r = 15m

$F = 6.67 \cdot 10^(-11) N \cdot (m^2)/(kg^2) \cdot (0.1 \cdot 0.1 kg^2)/(15^2 m^2) \n \n F=(6.67 \cdot 0.01 \cdot 10^(-11))/(225) N \n \n F \approx 0.00002964 \cdot 10^(-11) N \n \n F \approx 2.96 \cdot 10^(-16) N$

Greetining

Answer:

the answer is =2.96 x10^-11 N

Explanation:

The wavelength of some violet light is 420.0 nm. what is the frequency of this violet light?

Answers

The equation relating wavelength and frequency of light is:
v = fλ; where v is the wave's speed, f is its frequency and λ is the wavelength.
The speed of violet light will be the same as for any elecromagnetic radiation, that is,
3 x 10⁸ m/s
3 x 10⁸ = f(420 x 10⁻⁹)
f = 7.14 x 10¹⁴ Hz

The frequency of light for which the wavelength is $420\,{\text{nm}}$ is $\boxed{7.14 * {{10}^(14)}\,{\text{Hz}}}$ .

Further explanation:

The frequency is a measure of number of wave’s that passes through a fixed point or place in a given time interval. The S.I unit of frequency is Hertz $\left( {{\text{Hz}}} \right)$ .

Wavelength is defined as the distance between two successive crests or troughs of a travelling wave.

Examples of waves are sound wave, light wave, mechanical waves, surface waves etc.

Given:

The wavelength of the light used is $420\,{\text{nm}}$ .

The speed of the light is $3 * {10^8}\,{{\text{m}} \mathord{\left/ {\vphantom {{\text{m}} {\text{s}}}} \right. \kern-\nulldelimiterspace} {\text{s}}}$ .

Concept:

Light is an electromagnetic wave which carries energy in the form of electric field and magnetic field. The speed of light in vacuum is $3 * {10^8}\,{{\text{m}} \mathord{\left/ {\vphantom {{\text{m}} {\text{s}}}} \right. \kern-\nulldelimiterspace} {\text{s}}}$ .

The speed of light can be expressed in terms of wavelength of the light and the frequency of the light.

The speed of light is:

$c = f \cdot \lambda$

Rearrange the above expression.

$\boxed{f=(c)/(\lambda )}$ …… (1)

Here, $f$ is the frequency of the light, $c$ is the speed of the light in vacuum and $\lambda$ is the wavelength of the light.

Substitute $3 * {10^8}\,{{\text{m}} \mathord{\left/ {\vphantom {{\text{m}} {\text{s}}}} \right. \kern-\nulldelimiterspace} {\text{s}}}$ for $c$ and $420 * {10^( - 9)}\,{\text{m}}$ for $\lambda$ in equation (1).

$\begin{aligned}f&=\frac{{3*{{10}^8}\,{{\text{m}}\mathord{\left/ {\vphantom {{\text{m}} {\text{s}}}}\right.\kern-\nulldelimiterspace}{\text{s}}}}}{{420 * {{10}^(-9)}\,{\text{m}}}}\n&=7.14* {10^(14)}\,{\text{Hz}} \n \end{aligned}$

Thus, the frequency of light for which the wavelength is $420\,{\text{nm}}$ is $\boxed{7.14 * {{10}^(14)}\,{\text{Hz}}}$ .

Learn More:

1. What is the threshold frequency ν0 of cesium? Note that 1 ev (electron volt)=1.60×10−19 j. brainly.com/question/6953278

2. Calculate the wavelength of an electron (m = 9.11 × 10-28 g) moving at 3.66 × 106 m/s brainly.com/question/1979815

3. What is the frequency of light for which the wavelength is 7.1 × 102 nm brainly.com/question/9559140

Answer Details:

Grade: High School

Subject: Physics

Chapter: Electromagnetic Waves

Keywords:

Frequency, light, wavelength, 420 nm, 4.20x10^-7 m, 7.14x10^14 Hz, vacuum, air, crests, troughs, sound wave, light wave, mechanical wave.

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As a 5.0 x 10^2 newton basketball player jumps from the floor up toward the basket, the magnitude of the force of her feet on the floor is 1.0 x 10^3 newtons. As she jumps, the magnitude of the force of the floor on her feet is1) 5.0 x 10^2 N 2) 1.0 x 10^3 N 3) 1.5 x 10^3 N 4) 5.0 x 10^5 N

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As a 5.0 x 10^2 newton basketball player jumps from the floor up toward the basket, the magnitude of the force of her feet on the floor is 1.0 x 10^3 newtons. As she jumps, the magnitude of the force of the floor on her feet is1) 5.0 x 10^2 N
2) 1.0 x 10^3 N
3) 1.5 x 10^3 N
4) 5.0 x 10^5 N