A body builder exerts 15 N of force over 3 m. How much work did she do?
3.33 J


5 J


45 J


15 J

Here, we need to calculate weight.

Weight is given as the product of mass and gravity. This weight over here can also be denoted by force and it is said to be the force exerted by the bodies on the Earth.

If we take the gravity to be 10 m/s²,

then the weight for each given mass will be,

weight of 0.05 kg = 0.05*10 = 0.5 N

weight of 0.075 kg = 0.075 * 10 = 0.75 N

weight of 0.100 kg = 0.100 * 10 = 1 N

weight of 0.125 kg = 0.125 * 10 = 1.25 N

weight of 0.150 kg =0.150 * 10 = 1.5 N

weight of 0.175 kg = 0.175 * 10 = 1.75 N

weight of 0.200 kg = 0.200 * 10 = 2 N

weight of 0.225 kg = 0.225 * 10 = 2.25 N

weight of 0.250 kg = 0.250 * 10 = 2.5 N

weight of 0.275 kg = 0.275 * 10 = 2.75 N

weight of 0.300 kg = 0.300 * 10 = 3 N

Therefore, through this we got to know that the weight of the body is also the force exerted by the body on the Earth.

To learn more about weight, refer: https://brainly.com/question/17146606

#SPJ4

The best describes the image of a concave mirror when the object is at a distance greater than twice the focal point distance from the mirror is (c) virtual, upright, and magnification less than one.

When the object is placed beyond twice the focal length of a concave mirror, the image formed is virtual, meaning it cannot be projected onto a screen. The image is also upright, having the same orientation as the object.

In addition, the magnification of the image is less than one, indicating that the image is smaller in size compared to the object. This is because the concave mirror forms a reduced and virtual image when the object is located beyond the focal point.

The distance between the object and the mirror affects the size and position of the virtual image formed.

To know more about the concave mirror refer here :

https://brainly.com/question/13101215#

#SPJ11

VEGFR runs at a higher molecular weight than VEGF. In the position,  VEGFR is expected to appear band. Hence, option (c) is correct.

A chemical that binds to vascular endothelial growth factor (VEGF) receptors, which may be present on some cancer cells. This might stop cancers from forming the new blood vessels they require to grow.

Anti-VEGFR monoclonal antibodies of various sorts are being researched for the treatment of cancer. These chemicals fall within the categories of monoclonal antibodies and antiangiogenesis agents.

Learn more about antibodies here:

https://brainly.com/question/27931383

#SPJ4

True. Real estate refers to the physical land and improvements constructed on the land, such as buildings and structures.

Real estate encompasses both the natural elements (e.g., soil, water, trees) and man-made improvements (e.g., homes, commercial buildings, infrastructure).

Real estate includes all land-related assets, including any physical constructions or enhancements like homes, buildings, or natural resources. Land, homes, apartments, office buildings, retail establishments, and industrial facilities are all included in it. It also includes commercial and residential assets. A movable asset with value, real estate can be purchased, sold, rented, or leased. It plays a significant role in the economy by entailing a variety of tasks like real estate development, investment, brokerage, and property management. Location, supply and demand dynamics, the status of the economy, and regulatory restrictions all have an impact on the value of real estate. Real estate is a substantial investment and a crucial component of commerce, housing, and infrastructure growth.

Learn more about real estate here:

https://brainly.com/question/30320216

#SPJ11

Answer:

A force,

Explanation:

An object will stay in motion unless a the net force is non zero on an object. IE car rolling will slow down due to wheel friction as a force acting on it.

Answer:

2.5x10^4 J (scientific notation)

25,000 (Acellus)

Equation:

Q=mcΔT

where:

Q=heat

m = mass

c = specific heat

ΔT=change in temperature

Any rearranging?

Let's see.

No, we need heat.

So no rearranging.

Plug in the numbers and solve

It takes approximately 28,224 joules of heat to raise 0.0438 kg of aluminum from room temperature to its melting point.

To calculate the heat required to raise the temperature of aluminum from room temperature to its melting point, we need to use the specific heat capacity formula: Q = m × c × ΔT

where:

Q = heat (in joules)

m = mass of aluminum (in kilograms)

c = specific heat capacity of aluminum (in joules per kilogram per degree Celsius)

ΔT = change in temperature (in degrees Celsius)

Given:

Mass of aluminum (m) = 0.0438 kg

Specific heat capacity of aluminum (c) = 900 J/kg°C (approximate value for aluminum)

Change in temperature (ΔT) = melting point (660°C) - room temperature (20°C) = 640°C

Now, let's calculate the heat (Q):

Q = 0.0438 kg × 900 J/kg°C × 640°C

Q = 28,224 J (joules)

So, it takes approximately 28,224 joules of heat to raise 0.0438 kg of aluminum from room temperature to its melting point.

To know more about temperature

https://brainly.com/question/27944554

#SPJ2

Answer:

0.05s

Explanation:

frequency = speed / wavelength = 20/1 = 20Hz. Thus period = 1/f = 1/20 = 0.05 s

Frequency = speed / wavelength = 20/1 = 20Hz.

Thus period = 1/f = 1/20 = 0.05 s

Frequency is the number of waves that pass a fixed point in unit time.

The period of a wave is the time for a particle on a medium to make one complete vibrational cycle.

Hence to know more about period here

https://brainly.com/question/14588679

#SPJ2

The statement about a real image being formed at the point where light rays meet is accurate, making the sentence true

A real image is indeed a copy of an object formed at the point where light rays actually meet. This is in contrast to a virtual image, where the light rays do not actually meet but only appear to do so when extended backward.

In summary, the statement about a real image being formed at the point where light rays meet is accurate, making the sentence true.

To know more about light rays visit

https://brainly.com/question/1030839

#SPJ11

The distance traveled by the cart during the first 0.5 seconds is 2 m.

The acceleration of the cart during the first 0.5 seconds is 16 m/s².

The time when the object changes direction is 4 seconds.

The distance travelled by the object between t₁ and t₂ is 16 m.

The total distance travelled while moving up the incline 18 m.

The distance distance traveled by the cart during the first 0.5 seconds is calculated using formular for area under velocity - time graph.

d₁ = bh

where;

d₁ = ¹/₂(0.5 s) x (8 m/s)

d₁ = 2 m

The average acceleration is calculated as follows;

a = Δv/Δt

where;

a = (8 m/s - 0 m/s)/(0.5 s)

a = 16 m/s²

Use the formula for average acceleration as shown below.

a = Δv/Δt

a = (0 - V)/(t₂ - t₁)

-2 = (0 - 8) / (t₂ - 0.5)

t₂ - 0.5 = -8/-2

t₂ - 0.5  = 4

t₂ = 4.5 s

d₂ = ¹/₂(t₂ - t₁)(v)

where;

d₂ = ¹/₂(4.5- 0.5)(8)

d₂ = 16 m

The total distance travelled while moving up the incline is calculated as follows;

dt = d₁ + d₂

dt = 2 m + 16 m

dt = 18 m

v₃ = v₂ + at₃

where;

-8 = 0 + (-2Δt)

-8 = -2Δt

Δt = 8/2

Δt = 4 seconds

t₃ = t₂ + Δt

t₃ = 4.5 s + 4 s = 8.5 s

Learn more about velocity time graph here: https://brainly.com/question/14086970

#SPJ1

The point between the two charges where the electric field equal to zero is calculated to be 1.55 m.

The charge q₁ is given as 3 nc = 3 × 10⁻⁹ c

It is located at x₁ = 0.

The charge q₂ is given as 7.5 nc = 7.5 × 10⁻⁹ c

It is located at x₂ = 4 m.

Let us suppose that, electric field is zero at the point x, it is in between 0 and 4 m.

We know the formula for electric field as,

E = k q /r²

Let us equate the electric field at both the charges.

k q₁/x² = k q₂/(x₂ - x)²

q₁ (x₂ - x)² = q₂ x²

3 × 10⁻⁹× (4 - x)² = 7.5 × 10⁻⁹ × x²

3 × ( 16 + x² - 8x) = 7.5 ×x²

48 + 3x² - 24x = 7.5x²

4.5 x² + 24x - 48 = 0

The two values of x are,

x = 1.55, -6.883

The distance cannot be negative. So, the electric field at x = 1.55 m is said to be zero.

Thus, the required value of x is 1.55 m.

To know more about electric field:

https://brainly.com/question/4273177

#SPJ4

The fundamental frequency (1st harmonic) of the string is approximately 278.43 Hz.

The fundamental frequency of a sound wave is the lowest frequency present in the wave.

To determine the fundamental frequency (1st harmonic) of the guitar string, we can use the formula:
f = v / (2 * L)
where f is the frequency, v is the speed of waves in the string, and L is the length of the string.
1. Convert the length of the string to meters:
L = 76.5 cm * (1 m / 100 cm) = 0.765 m
2. Substitute the values into the formula:
f = (425 m/s) / (2 * 0.765 m)
3. Calculate the frequency:
f ≈ 278.43 Hz

Learn more about fundamental frequency refer: https://brainly.com/question/31314205

#SPJ11

Answer: lodestone

An example of a natural magnet is the lodestone, also called magnetite. Other examples are pyrrhotite, ferrite, and columbite.

Classification of Magnets

Lodestones are a common example of natural magnets. Artificial magnets – Artificial magnets can be produced by man-made means and have a stronger magnetic field. They can also be shaped as required. When an artificial magnet is shaped in the form of a bar, it is called a bar magnet.

Explanation:

Answer:

Explanation:

Friction is a force that opposes the motion or potential motion of two items that come into contact. The word "relative motion" emphasizes that friction resists the motion of the objects with respect to one other, and it emphasizes that friction specifically operates against the motion or potential motion between two objects in contact.

The speed of wave with a wavelength of 4 m and a frequency of 85 Hz is 340m/s

The speed of a wave is the product of the frequency of the wave and its wavelength. Mathematically, it is expressed as:

\(v = f \lambda\) where:

f is the frequency

\(\lambda\) is the wavelength

Given the following:

f =85Hz

\(\lambda\) = 4 m

Substitute the given parameter into the formula:

v = 85 × 4

v = 340m/s

Hence the speed of wave with a wavelength of 4 m and a frequency of 85 Hz is 340m/s

Learn more here: https://brainly.com/question/15721131

the electric field is more than the threshold value and the capacitor will experience dielectric breakdown.

1. Given values are,
side length of metal plates, a = 3 cm and b = 6 cm
distance between the plates, d = 2.36 cm
voltage, V = 110 V
dielectric constant of water, k = 80.4
dielectric constant of new material, k2 = 3.75
a) To calculate the capacitance of capacitor, the formula is, C=εA/d  ……………… (1)
where A = area of plate, ε = permittivity, and d = separation distance between two plates.
We know that the permittivity of vacuum is given as, ε0 = 8.854 x 10^-12 F/m
The capacitance of capacitor can be expressed as,
C1 = ε0 (kA/d) …………….. (2)
where, ε0 = permittivity of vacuum, k = dielectric constant and A = area of plate.
Substituting the given values in equation (2),
C1 = 8.854 x 10^-12 x 80.4 x (0.03 x 0.06)/0.0236
C1 = 0.000132 F
Therefore, the capacitance of capacitor is 0.000132 F.

b) To calculate the new capacitance, the formula is given as,
C2 = k2ε0A/d ……………… (3)
where k2 is the dielectric constant of new material.
Substituting the given values in equation (3),
C2 = 3.75 x 8.854 x 10^-12 x (0.03 x 0.06)/0.0236
C2 = 0.000263 F
Therefore, the new capacitance is 0.000263 F.

c) The new voltage can be calculated as,
V2 = V1(C1/C2) …………… (4)
Substituting the given values in equation (4),
V2 = 110 (0.000132/0.000263)
V2 = 55 V
Therefore, the new voltage is 55 V.

d) The charge on each plate is given as,
Q = CV ………….. (5)
Substituting the given values in equation (5),
Q = 0.000132 x 110
Q = 0.0145 C
Therefore, the charge on each plate is 0.0145 C.

2. Given values are,
capacitance, C = 3.23 µF
area of plate, A = 6.35 mm^2
separation distance between two plates, d = ?
new capacitance, C2 = 5.63 mF
new dielectric constant, k2 = ?
voltage, V = 110 V
electric field between two plates, E = 8.99 x 10^4 N/C
working voltage, Vw = 63 V

a) The separation distance between two plates can be calculated as,
C1/C2 = d2/d1  …………….. (6)
where d1 and d2 are the initial and final separation distance, respectively.
Substituting the given values in equation (6),
3.23 x 10^-6/5.63 x 10^-3 = d2/d1
d2 = 5.63 x 10^-3 x (d1/3.23 x 10^-6)
Area of plate, A = 6.35 mm^2 = 6.35 x 10^-6 m^2
The capacitance can be expressed as,
C = εA/d
d = εA/C
where ε = permittivity of dielectric material.
Therefore, substituting the given values in above equation,
d1 = ε x 6.35 x 10^-6/3.23 x 10^-6
d1 = 12.50 ε
Substituting the value of d1 in equation (6),
5.63 x 10^-3 = d2/12.50 ε
d2 = 70.38 ε
The separation distance between two plates is 70.38 ε.

b) The new dielectric constant can be calculated as,
C2 = k2ε0A/d2
k2 = C2d2/ε0A
Substituting the given values in above equation,
k2 = 5.63 x 10^-3 x 70.38 ε/(8.854 x 10^-12 x 6.35 x 10^-6)
k2 = 3.95
Therefore, the new dielectric constant is 3.95.

c) The new voltage can be calculated as,
V2 = V1(C1/C2)
Substituting the given values in above equation,
V2 = 110(3.23 x 10^-6/5.63 x 10^-3)
V2 = 0.063 V
Therefore, the new voltage is 0.063 V.

d) The electric field can be expressed as,
E = V/d
d = V/E
Substituting the given values in above equation,
d = 63/8.99 x 10^4
d = 7.01 x 10^-4 m
The voltage, V = 110 V > working voltage, Vw = 63 V

Learn more about electric field here :-

https://brainly.com/question/11482745

#SPJ11

The transmitted intensity is approximately 12.98 W/m^2.

The intensity of the light transmitted through a surface is given by:

i1 = i0 * cos(θ0) * cos(θta)

where i0 is the intensity of the incident light, θ0 is the angle of incidence (measured from the surface normal), and θta is the angle of transmission (measured from the surface normal).

Substituting the given values, we get:

i1 = 20.0 W/m^2 * cos(25.0°) * cos(40.0°)

i1 = 12.98 W/m^2

To know more about intensity refer here

https://brainly.com/question/3525148#

#SPJ11

Answer:

Electricity is the flow of electrons, because electrons pass from atom to atom.

Answer:

Because the energy is waning

Explanation: hope this helps

Answer:

77.8 g potassium bromide can be dissolved in 100 grams of water at 40°C.

Explanation:

In a given a line of KBr is straight.

Answer:

Below

Explanation:

To convert mm to m all you need to do is divide the value by 1,000

so : 3 / 1,000 = 0.003 meters

Hope this helped!

Answer:

explain you qns. briefly

The testes are the primary male reproductive organs responsible for producing testosterone.

Vas Deferens: Also known as the ductus deferens, it is a muscular tube that carries mature sperm from the epididymis to the ejaculatory ducts.

Seminal Vesicles: These glands produce a fluid rich in fructose and other nutrients, which helps nourish and provide energy to the sperm.

Prostate Gland: It is a walnut-sized gland that produces a milky fluid containing enzymes, proteins, and other substances that contribute to se men formation.

Cowper's Glands: These small glands secrete a clear, alkaline fluid that lubricates the urethra and neutralizes any acidic urine remnants, creating a favorable environment for sperm.

Urethra: This is a tube that runs  serves as a passage for both urine and semen, though not at the same time.

Learn more about reproduction on

https://brainly.com/question/461781

#SPJ1

Answer:

the acceleration due to gravity, g is zero (0)

the time of the motion is 0.2 s

Explanation:

Given;

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

distance traveled by the student, x = 3 m

The motion of the student is directed towards the horizontal and the acceleration due to gravity, g is zero (0).

The time of the motion is calculated as;

x = ut + ¹/₂gt²

x = ut + ¹/₂(0)t²

x = ut

t = x/u

t = 3 / 15

t = 0.2 s

Therefore, the time of the motion is 0.2 s

Mars exhibits the most range in apparent size and brightness of any planet. Between 25.69" and 3.49", its angular size ranges by a factor of more than seven.

We are aware that it takes the moon 27.32 days to orbit the earth. Thus, we are aware of an orbit's period.

Ratios: 2 days equals 27.32 days, and 1 radian equals 1 second.

Radians per second are equal to (2)/(27.32 days* 24 hours/day * 60 minutes/hr * 60 seconds/minute)

Equation: = 2*pi*(1/T)

Either way, it is clear that we must translate the days into seconds and then divide the resulting number by 2pi.

Mars exhibits the most range in apparent size and brightness of any planet. Between 25.69" and 3.49", its angular size ranges by a factor of more than seven.

Learn more about angular size

brainly.com/question/3103176

#SPJ4

Orbital velocity of satellite

\(v = \sqrt{ \frac{gm}{r} } \)

Radius of new orbit r' =6r

Thus new orbital velocity of satellite:

\(v = \sqrt{ \frac{gm}{6r} } = \frac{v}{ \sqrt{6} } \)

For satellites in circular orbits, the relationship between orbital velocity and altitude is strict. The task of a satellite launch rocket is to release the satellite at a suitable place in space, with the appropriate speed and direction of movement to put it in the desired orbit.

How a satellite stays in orbit can be thought of in two equivalent ways, both of which explain the relationship between the satellite's altitude and velocity.

The motion of the satellite can be seen as creating a centrifugal force that opposes the gravitational pull. For example, imagine attaching an object to a string and swinging it in a circle. The object is pulling outward against the string, and that outward force (centrifugal force) becomes greater the faster the object swings. At the right speed, the centrifugal force of the satellite due to motion around the earth just balances the gravitational pull, and the satellite remains in orbit.

Learn more about Orbital velocity at https://brainly.com/question/16040381.

#SPJ4

Answer:

Defined below

Explanation:

Climate change is simply the long term change in the average weather patterns that are associated with the local, regional and global climates of the earth. Climate change is usually driven by human activities like burning of fossils; natural processes like cyclic ocean patterns; external factors like volcanic eruptions.

Answer:

By the use of carbon nanotubes as the clothing material.

Explanation:

Carbon nanotubes is a technology designed by engineers that could make charging of the cell of a phone possible. It has some some required properties like it is strong, conductive and heat-resistant which are suitable for the purpose.

This technology which involves a progressive dipping of a pure cotton material into nafion polymer, then in a chemical solution of carbon nanotubes and finally in polystyrene until it becomes saturated and have a conductive property. The conductive cotton can be used to make such cloths which becomes conductive and produces some electromagnetic waves when there is a contact with sweat or fluid from the body. The waves generated can be used to charge a cell phone through radiation interaction.

The form of electromagnetic radiation that has a wavelength of 10-7 nanometers is known as Ultraviolet. Thus, the correct option for this question is C.

Electromagnetic radiation may be defined as a type of radiation that considerably possesses both electric and magnetic fields. Apart from this, these radiations always travel in waves. Electromagnetic radiations include visible light, radio waves, gamma rays, X-rays, etc.

Among all kinds of electromagnetic radiations, gamma rays have the shortest wavelength and high frequency. While microwaves have the longest wavelength and lowest frequency. As the wavelength and frequency are inversely related to one another.

Therefore, ultraviolet radiation is a type of electromagnetic radiation that has a wavelength of 10-7 nanometers. Thus, the correct option for this question is C.

To learn more about Electromagnetic radiation, refer to the link:

https://brainly.com/question/1408043

#SPJ1

Answer:

a) Time = 2.67 s

b) Height = 35.0 m

Explanation:

a) The time of flight can be found using the following equation:

\( x_{f} = x_{0} + v_{0_{x}}t + \frac{1}{2}at^{2} \)   (1)

Where:

\( x_{f}\): is the final position in the horizontal direction = 80 m

\( x_{0}\): is the initial position in the horizontal direction = 0

\(v_{0_{x}}\): is the initial velocity in the horizontal direction = 30 m/s

a: is the acceleration in the horizontal direction = 0 (the stone is only accelerated by gravity)

t: is the time =?  

By entering the above values into equation (1) and solving for "t", we can find the time of flight of the stone:  

\( t = \frac{x_{f}}{v_{0}} = \frac{80 m}{30 m/s} = 2.67 s \)

b) The height of the hill is given by:

\( y_{f} = y_{0} + v_{0_{y}}t - \frac{1}{2}gt^{2} \)

Where:

\( y_{f}\): is the final position in the vertical direction = 0

\( y_{0}\): is the initial position in the vertical direction =?

\(v_{0_{y}}\): is the initial velocity in the vertical direction =0 (the stone is thrown horizontally)            

g: is the acceleration due to gravity = 9.81 m/s²

Hence, the height of the hill is:

\( y_{0} = \frac{1}{2}gt^{2} = \frac{1}{2}9.81 m/s^{2}*(2.67 s)^{2} = 35.0 m \)  

I hope it helps you!