Select the correct sentences on the image.
Matthew throws a ball straight up into the air. It rises for a period of time and then begins to drop. At which points in the ball's journey will
be the greatest force acting on the ball?

Answer:

[tex]\text{Weight} = \text{Mass} \times \text{Gravitational acceleration}[/tex]

Explanation:

149,597,871 kilometres

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Answer:

It's D, they're all radioactive. This is due to the molecules that it is made up of

Answer:

the answer is A

Explanation:

I hope it helps you

Answer:

they use a spaceship plus oxygen space has a gravitational force

Answer:

To express this concept mathematically, the work W is equal to the force f times the distanced, or W = fd. If the force is being exerted at an angle θ to the displacement, the work done is W = fd cos θ.

The SI unit of work is the joule (J). It is defined as the work done by a force of one newton through a distance of one meter.

Explanation:

Work is done when a force is applied to an object through a distance. This means that when a force is applied to an object through a distance, the object's total energy will be affected.

Answer:

The gravitational force on the moon is less than on Earth because the strength of gravity is determined by an object's mass. The bigger the object, the bigger the gravitational force. Gravity is pretty much everywhere. We just feel it in different ways depending on our state of motion.

Explanation:

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When two charged plates are separated by a distance, the potential difference between the plates is 54 Volts.

The electric field intensity which does not increase or decrease with time or remain constant is called the uniform electric field.

Given is the plates separated by distance d = 15 cm =0.15 m, electric field E= 360 N/C.

The relation between the electric field and voltage is

E=V/d

Substitute the values into the expression to get the potential difference V,

V = 360 x 0.15

V = 54 Volts

Thus, the potential difference between the plates is 54 Volts.

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One can calculate speed from the given data. The speed is 4.44m/s.

The speed is the ratio of distance and the time taken to cover that distance.

Given is the distance d =4km =4000m and the time taken t 15 min =15 x60 =900 s

Then the speed will be

s = d/t

s = 4000/900

s= 4.44 m/s

Thus, the speed is calculated as 4.44m/s.

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Answer:

a.one atom of fluorine and two atoms of oxygen

Explanation:

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Answer:

Warm air is less dense than cold air, and warm air holds more moisture than cold air.

Explanation:

HOPE THIS HELPS AND HAVE A NICE DAY <3

Answer:

Increase is energy transferred

Explanation:

Option B is correct

Answer:

I believe that it is the 1st one

Hi there!

Counterclockwise.

If a loop of wire is placed in a magnetic field directed out of the page that disappears, that means that the magnetic flux out of the page through the loop has decreased.

The loop will try to oppose this change in the magnetic flux, so an induced current that produces an additional magnetic field out of the page will occur to make up for the decrease in the magnetic flux.

Using the magnetic right-hand rule, the current in the loop would need to be traveling in the counterclockwise direction in order for the produced magnetic field to be directed out of the page inside the loop.

Answer:

Propagation of Sound Waves:

Sound waves move (propagate) through a medium by means of particle-to-particle interaction. The source disturbs the immediately surrounding particles, causing them to vibrate about their fixed position at the same frequency as the source.

A mouse have the same momentum as an elephant when the mouse has a large velocity and the elephant has a small velocity. The correct option is A.

The momentum is the product of the mass of the object and its velocity.

Mouse has mass very less than the elephant. In order to make their momentum same, the velocity of the mouse must be greater than the elephant.

Mm x Vm = Me x Ve

A mouse have the same momentum as an elephant when the mouse has a large velocity and the elephant has a small velocity.

Thus,  the correct option is A.

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Answer:

A force of μk⋅60N is needed to keep a 60-newton rubber block moving across level, dry asphalt in a straight line at a constant speed.

Explanation:

Answer:

3.6 s

Explanation:

100 km/hr =27.77 m/s

100/27.77=3.6 sec

Let k be the spring constant.

• When the spring is compressed by 11 cm = 0.11 m, it stores

1/2 k (0.11 m)²

of potential energy.

• When it's compressed by 66 cm = 0.66 m, it stores

1/2 k (0.66 m)²

of potential energy.

Then the ratio of these potential energies is

(1/2 k (0.66 m)²) / (1/2 k (0.11 m)²) = 36

which is to say, the spring stores 36 times more energy when it's compressed by 66 cm compared to 11 cm.

Answer:

The earth's axis of rotation is tilted 66.5 degrees with respect to its orbital plane around the sun and its axis of rotation is inclined 23.5 degrees from the perpendicular, with respect to this plane. The tilt of the earth affects the angle between the sun beam and the normal over a surface.

Earth orbits at an angle, so half the year, the Northern Hemisphere is tilted toward the Sun — this is summer in the Northern Hemisphere, and winter in the Southern Hemisphere. The other half of the year, the Northern Hemisphere is tilted away from the Sun, creating winter in the north and summer in the south.

When the Earth's axis is tilted toward the sun for the Northern Hemisphere, the people in the Northern Hemisphere experience summer, while at the same time, the Southern Hemisphere is tilted away from the sun and the people there experience winter.

The Northern Hemisphere receives the maximum intensity of the sun's rays, while the angle of sunlight decreases in the Southern Hemisphere.

When the sun's rays strike Earth's surface near the equator, the incoming solar radiation is more direct (nearly perpendicular or closer to a 90˚ angle). Therefore, the solar radiation is concentrated over a smaller surface area, causing warmer temperatures.

Answer:

xfxy naa

Explanation:

dhdhuciffbfjfufu

Hence,the time it takes the second cyclist to catch up to the first cyclist will be 2.6 h.

The change of displacement with respect to time is defined as the velocity.  Velocity is a vector quantity. it is a time-based component.

[tex]\rm D_{rel}= V_{rel}\times t_{rel} \\\\ \rm D_{rel}= (V_1-V_2)\times t_{rel} \\\\ T_{rel}=\frac{D_{rel}}{V_1-V_2} \\\\ T_{rel}=\frac{20.8}{28-20} \\\\ T_{rel}= 2.6 \ h[/tex]

The time it takes the second cyclist to catch up to the first cyclist will be 2.6 h.

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Answer:

Drinking water

Our foods

Washing clothes

The average velocity of the boat given the data from the question is 6.32 Km/h

Velocity is defined as the rate of change of displacement with time. Mathematically, it is expressed as

Velocity = displacement / time

D² = d₁² + d₂²

D² = 3² + 1²

D² = 9 + 1

D² = 10

Take the square root of both sides

D = √10

D = 3.16 Km

Average velocity = resultant displacement / time

Average velocity = 3.16 / 0.5

Average velocity = 6.32 Km/h

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Answer:

the forces are balanced :)

Explanation:

x max = (vi² sin 2α) / g

x max = (6.25² sin 90)/10

x max = 39.0625/10 = 3.91 m

Answer:  there is no shadow on the Moon with the solar eclipse.

Explanation: When the Moon passes between the Earth and the Sun, it casts a moving shadow on the Earth's surface, known as a solar eclipse. When the Earth passes between the Sun and the Moon, a lunar eclipse occurs, creating a shadow on the Moon.

Answer:

8 meters

Explanation:

Frequency of waves =  5 waves / 4 s = 1.25 Hz

speed = frequency * wavelength

speed/ frequency = wavelength

  10 / 1.25 = 8 m

Resonance would occur when a vibrating tuning fork is placed near another tuning fork of the same frequency.

Resonance can be defined as a phenomenon in which a physical object is forced to vibrate due to the vibration of a second object at the same natural frequency of the first object.

This ultimately implies that, resonance is an increase in the amplitude of oscillation that only occurs when the frequency of a periodically applied force is equal to the natural frequency of a physical object such as a tuning fork, on which it's acting.

In conclusion, we can infer and logically deduce that resonance would occur when a vibrating tuning fork is placed near another tuning fork of the same frequency.

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1) 5 seconds

2) 75 meters

Explanation:

Refer to the attachment

Answer:

A. Greenhouse gases

Explanation:

Because nuclear fission involves the modification of atoms.

Answer:

Greenhouse gases, because in nuclear fission, we are talking about modifying strictly atoms to get a reaction, therefore it would not make sense for greenhouse gases to be a reaction.