A planet's rotation determines the length of its day and its revolution determines the length of its year. A day on Earth is 24 hours and a year on Earth is 365 days. In contrast to Earth, a day on Venus is longer than a year on Venus. Which is the best reason for why this is so?

Answer:

Here's why this is correct

According to BrightHubEducation, Machines make work easier by changing the size of force, direction of force, or distance the force acts on. Lifting a car with a flat tire and loosening the lug nuts can be accomplished by a single person thanks to simple machines. The jack and lug wrench are simple machines that alter the force needed to change the tire.

Hope this helps!  <3

Answer:

36 N

Explanation:

The tension on the string :

T =mv²/r ------where

m= mass of object = 8 kg

v= tangential velocity = 3 m/s

r= length of the string = 2m

T= [ 8 * 3² ] / 2

T= 36 N

Answer:

Electromagnet.

Explanation:

Electric bulb and electric water heather are application of heating effect of electric current. The electromagnet is not the result of heating effect of electric current. The bulb gives light due to the heating effect similarly the water is heated or warmed by the heating effect of electric current.

Answer:

a. The speed of the helicopter at the moment the package is dropped is approximately 15.519 m/s

b. The position of the package 2s after it is dropped is (31.038 m, -9.8 m)

c. The time of flight of the food package is approximately 5.105 seconds

d. The horizontal distance covered is approximately 79.22 m

Explanation:

The given parameters are;

The height at which the helicopter is flying = 125 m

The magnitude of the velocity of the package after 2 seconds, v = 25 m/s

a. The vertical velocity of the package, [tex]v_y[/tex], is given as follows;

[tex]v_y[/tex] = [tex]u_y[/tex] + g·t

Where;

[tex]u_y[/tex] = 0 m/s for the dropped food package

t = The duration of the package in the air = 2 s

g = The acceleration due to gravity = 9.8 m/s²

Therefore;

[tex]v_y[/tex] = g·t = 9.8 m/s² × 2 s = 19.6 m/s

We have,  [tex]v = \sqrt{v_x^2 + v_y^2}[/tex],

Where;

vₓ = The horizontal velocity of the food package = The horizontal speed of the helicopter

therefore, [tex]v_x = \sqrt{v^2 - v_y^2}[/tex], which gives;

[tex]v_x = \sqrt{v^2 - v_y^2} = \sqrt{25^2 - 19.6^2} \approx 15.519 \ m/s[/tex]

The speed of the helicopter at the moment the package is dropped ≈ 15.519 m/s

b. The vertical if the package after 2 s is given as follows;

The vertical position of the package after 2 s is given by the kinematic equation, h = 1/2·g·t² = 1/2 × 9.8 m/s² × 2 s = 9.8 m

The food package is located 9.8 m vertically below the point where it is dropped

The horizontal position, x, of the package after 2 s is given by the following kinematic equation, x = vₓ × t

Therefore, x = 15.519 m/s × 2 s ≈ 31.038 m

The coordinates of the location of the package 2 seconds after it is dropped is (31.038 m, 9.8 m)

c. The time of flight, [tex]t_{tot}[/tex], of the food package which is the time it takes the package to reach the ground from 125 m, is given as follows;

[tex]t_{tot} = \sqrt{\dfrac{2 \cdot h}{g} } = \sqrt{\dfrac{2 \times 125 \ m}{9.8 \ m/s^2} } \approx 5.051 \ seconds[/tex]

The time of flight of the food package, [tex]t_{125}[/tex] ≈ 5.105 seconds

d. The horizontal distance covered, [tex]x_{tot}[/tex] = vₓ × [tex]t_{tot}[/tex] ≈ 15.519 m/s × 5.105 s = 79.224495 m ≈ 79.22 m.

Answer:

An unbalanced force can change an object's motion. An unbalanced force acting on a still object could make the object start moving. An unbalanced force acting on a moving object could make the object change direction, change speed, or stop moving.

Answer:

The answer is density

Explanation:

They density of the air is what makes a difference.

 The acceleration of each cart be 4 meter/second².

Acceleration is rate of change of velocity with time. Due to having both direction and magnitude, it is a vector quantity. Si unit of acceleration is meter/second² (m/s²).

Given parameters:

the average force on the 1kg cart is 4N.

Hence, the acceleration of the 1 kg cart be = force/mass

= 4/1 meter/second²

= 4 meter/second².

As two carts are pushed apart by an expanding spring, the acceleration of the other carts also be 4 meter/second².

Learn more about acceleration here:

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Answer:

Divide Whole Numbers by Fraction Worksheet

To divide fractions, you need to invert the divisor and multiply. To invert a fraction, reverse the numerator and denominator. The special name given to an inverted fraction is reciprocal. Recall that a whole number has a understood denominator of 1.

Answer:

pressure=force/area

p=600/50

p=12

so 12Nm^-1

Answer:

The linear speed is 6.51 m/s

Explanation:

Uniform Circular Motion

It's a movement of an object along the circumference of a circle. It can also be defined as a rotation along a circular path.

The angular speed can be calculated as follows:

[tex]\displaystyle \omega=\frac{v}{r}[/tex]

Where:

v = tangential or linear speed

r = radius of the circle described by the rotating object

To calculate the linear speed, solve for v:

[tex]v = \omega\cdot r[/tex]

[tex]v = 21\ rad/s\cdot 0.31\ m[/tex]

[tex]v = 6.51\ m/s[/tex]

The linear speed is 6.51 m/s

Answer:

I believe the answer is C

Explanation:

because centripetal force is generally assosiated with rotation and how fast something spins

Torque is the measure of how effectively a force causes rotation because centripetal force is generally assosiated with rotation and how fast something spins.

Torque is a pattern of the force that can make a victim to revolve on an axis. The torque's direction vector based on the force's direction on the axis.

The SI unit of torque is the Newton-meter. The Torque can be both static or dynamic.

A static is one that does not generate an angular acceleration.

The  Torque's magnitude vector ζ for a torque generated by a given force F is;

ζ = F .r sin(θ)

where,

r is the width of the moment arm

θ is the angle within the force vector and the moment arm.

In rotational kinematics, torque is measured as;

ζ = Iα

Where,

α is the angular acceleration

I is the rotational inertia

therefore, Torque is the measure of how effectively a force causes rotation because centripetal force is generally assosiated with rotation and how fast something spins.

Learn more about torque;

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Answer:

the form of energy that makes something move

Explanation:

Explanation:

HERE,

momentum =126 kg.m/s

weight =12 kg

we know that,

[tex]\tt{ velocity =\dfrac{momentum }{weight} }[/tex]

According to the question,

Deers velocity

=[tex]\tt{\dfrac{126}{12} }[/tex] ⠀

=[tex]\tt{ 10.5 }[/tex] ⠀

Deers velocity is 10.5 m/s.

Answer:

They are inversely proportional

Explanation:

The force of gravity and the distance between two objects involved are inversely proportional to one another.

According to newton's law of universal gravitation "the force of gravity between two bodies is a product of their masses and inversely proportional to the distances between them".

Answer:

THE CORRECT ANSWER IS OPTION ( c )Pulmonary aortic valve

Explanation:

Pulmonary aortic valve is not a component of systemic circuit.

Systemic circuit is a part of circulatory system that help to transport blood to different part of the body. It transport blood from the left ventricle to the capillaries and then other part of the body.

Therefore, Pulmonary aortic valve is not a component of systemic circuit.

Learn more about systemic circuit.

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Answer:

m/s^2, acceleration

Explanation:

velocity in SI units is meter / second

dividing by time(second) gives meter / second^2 which is acceleration.

Answer:

It will take George 20 minutes to get to his friends house.

Explanation:

divide 5km by 15km and get a constant of 3

George is riding at 15KM/HR meaning divide the hour by 3

60 minutes by 3 is 20

Answer:

The moon takes 27 days to revolve around the earth.

Explanation:

I hope this helps :)

The moon takes 27 days to revolve around the Earth.

Answer:

5 meters

Explanation:

Step one:

given data

mass of the toy car= 50g

Work done= 30J

Force applied F= 5N

Required

The distance moved

Step two:

The expression for the work done is given as

WD= force * distance

substitute

30= 5*d

divide both sides by 5

d=30/5

d= 5m

The distance moved is 5 meters

Answer:One of this country's most notable achievements will be spending Canada Day weekend marking its own milestone anniversary in a unique place, floating up in space.

After 10 years in the ether, several times farther from Earth than the International Space Station, it remains the world's smallest space telescope.

MOST was also Canada's first-ever space telescope when it was launched into space on June 30, 2003.

It has helped make Canada a leader in the field of micro satellites.

But Matthews is particularly enthused about all the other possibilities that might be opened up by the 60-kilogram MOST.

The colorful University of British Columbia astrophysicist firmly believes there is life outside our solar system.

"Certainly simple forms of life like microbial life is probably very common — and I hope complex life," Matthews said in a recent interview. "If it's out there, we're finding the places where it's most likely to live."

I have no Idea if this helps but hope it does.

Answer:

a. 12.57 m/s b. 39.5 m/s² c. Her centripetal force is four times her weight.

Explanation:

a. What is Missy's linear speed on the rotor?

Missy's linear speed v = 2πr/T where r = radius = 4.0 m and T = time it takes to complete one revolution = 2.0 s

So, v = 2πr/T

= 2π(4.0 m)/2.0 s

= 4π m/s

= 12.57 m/s

b. What is  Missy's centripetal acceleration on the rotor?

Missy's centripetal acceleration, a = v²/r where v = linear velocity = 12.57 m/s and r = radius = 4.0 m

a = v²/r

= (12.57 m/s)²/4.0 m

= 158.01 m²/s² ÷ 4.0 m

= 39.5 m/s²

c. If her mass is 50-Kg, how is the centripetal force  compare to her weight?

Her centripetal force F = ma where m = mass = 50 kg and a = centripetal acceleration = 39.5 m/s².

Her weight W = mg where m = mass = 50 kg and g = acceleration due to gravity = 9.8 m/s².

So, comparing her centripetal force to her weight, we have

F/W = ma/mg

= a/g

= 39.5 m/s² ÷ 9.8 m/s²

= 4.03

≅ 4

So her centripetal force is four times her weight.

Answer:

120

Explanation:

10 x 3 = 30

30 x 4 = 120

I hope this helps u! :D

Answer: ayee fanks bro

Explanation:

Explanation: Newton's first law of motion states that a body at rest remains at rest, or, if in motion, remains in motion at a constant velocity unless acted on by a net external force. This is also known as the law of inertia. Inertia is the tendency of an object to remain at rest or remain in motion.

Answer:

B. an organism being changed through technological methods

Explanation:

Science can be defined as a branch of intellectual and practical study which systematically observe a body of fact in relation to the structure and behavior of non-living and living organisms (animals, plants and humans) in the natural world through experiments. One of the most important branch of science is bioengineering. Bioengineering can be defined as a high-tech process which avail scientists the opportunity or ability to modify, remove, replace and insert Deoxyribonucleic Acid (DNA) sequence in a living organism such as bacterias, animals, plants etc in order to correct a genetic disorder and to improve on their physical and chemical conditions.

Selective breeding has been used to create plants that are more resistant to disease. Thus, this is an example of an organism being changed through technological methods.

Answer:

29.75 revolutions

Explanation:

The kinematic formula for distance, given a uniform acceleration a and an initial velocity v₀, is

[tex]d=v_0t+\frac{1}{2}at^2[/tex]

This car is starting from rest, so v₀ = 0 m/s. Additionally, we have a = 9.2/9.7 m/s² and t = 9.7 s. Plugging these values into our equation:

[tex]d=0t+\frac{1}{2}\left(\frac{9.2}{9.7}\right)(9.7)^2\\d=\frac{1}{2}(9.2)(9.7)\\d=4.6(9.7)\\d=44.62[/tex]

So, the car has travelled 44.62 m in 9.7 seconds - we want to know how many of the tire's circumferences fit into that distance, so we'll first have to calculate that circumference. The formula for the circumference of a circle given its diameter is [tex]c=\pi{d}[/tex], which in this case is 47.8π cm, or, using π ≈ 3.14, 47.8(3.14) = 150.092 cm.

Before we divide the distance travelled by the circumference, we need to make sure we're using the same units. 1 m = 100 cm, so 105.092 cm ≈ 1.5 m. Dividing 44.62 m by this value, we find the number of revs is

[tex]44.62/1.5\approx29.75[/tex] revolutions

Answer:

96500÷5=19300

Explanation:

96500÷5=19300

Given :

A 13.3 kg box sliding across the ground  decelerates at 2.42 m/s².

To Find :

The coefficient of kinetic friction.

Solution :

Frictional force applied to the box is :

[tex]f = ma[/tex]    ....1)

Also, force of friction is given by :

[tex]f = \mu mg[/tex]  ....2)

Equating equation 1) and 2), we get :

[tex]\mu mg = ma\\\\\mu = \dfrac{a}{g}\\\\\mu = \dfrac{2.42}{9.8}\\\\\mu = 0.247[/tex]

Therefore, the coefficient of kinetic friction is 0.247 .

Answer:

Microwaves

Radiowaves.

Answer:

radio waves

microwaves

infrared (IR)

visible light

ultraviolet light (UV)

X-rays

gamma rays

Explanation:

these are the electromagnetic spectrum. they are arranged in decreasing wavelength and increasing energy and frequency.