This table lists the densities of four different substances.
SUBSTANCE
DENSITY (G/CM)
W
1.02
Х
3.07
Y
2.81
Z
0.98
If water has a density of 1.0 g/cm, which substance will float on the surface of water?
W
O a
Oь
Y
Oc
X N
Od

Answer:

4 m/s

Explanation:

speed = distance/time

speed= 20/5 = 4

similarly for all no. the answer is constant,i.e. 4

Answer:

E = 225.4 J

Explanation:

Given that,

The mass of a brick, m = 2 kg

It is lifted up by 11.5 m

We need to find the gain in gravitational potential energy. The formula for gravitational potential energy is given by :

[tex]E=mgh\\\\E=2\times 9.8\times 11.5\\\\E=225.4\ J[/tex]

So, the gain in gravitational potential energy is 225.4 J.

Answer:

d or b i think

Explanation:

i looked it up on go ogle :)

Answer:

b

Explanation:

sounds like it should be right

Answer:

4 kg at 30 m/s

Explanation:

comparing in pair, the 3rd is more than the 1st, and the 4th is more than the 2nd, so it boils down to the lasts two. calculate, and im pretty sure you get 4 kg at 30 m/s...

Momentum of a ball of mass 2 kg moving at 30 m/s = 2 kg × 30 m/s = 60 kg m/s

Momentum of a ball of mass 3 kg moving at 20 m/s = 3 kg × 20 m/s = 60 kg m/s

Momentum of a ball of mass 4 kg moving at 30 m/s = 4 kg × 30 m/s = 120 kg m/s

Momentum of a ball of mass 5 kg moving at 20 m/s = 5 kg × 20 m/s = 100 kg m/s

So, highest momentum is of a ball of mass 4 kg moving at 30 m/s (120 kg m/s).

Answer:

no

Explanation:

Answer:

People are exposed to sources of radiation in all aspects of everyday life. Radioactive sources can be very useful but need handling carefully to ensure safety.

Explanation:

Answer:

-135m/s

Explanation:

Impulse P=change in momentum

Let the final velocity be -Vf (negative sign due to opposite direction)

Average force =Impulse/Time

=m(-Vf-Vi)/t

=>0.15m.g (-Vf-45)/0.003=4500N

=>0.15 (-Vf-Vi)=13.5

=>(-Vf-Vi)=90

Given,Vi=45

=>(-Vf) =90+45

=>(-Vf)=135

=>Vf = -135m/s

Hope it helps!!!

The velocity of ball coming off the bat will be -135m/s. Negative shows the direction.

The change of distance with respect to time is defined as velocity. It is a time-based component. Its unit is m/sec.

The given data in the problem is:

m ( mass) =0.15 Kg

u is the initial velocity of fall =45 m/sec

v is the final velocity= ?

From the Newton's second law of motion;

Impulse = change in momentum

[tex]\rm I= \triangle P \\\\ Ft = m(v-u) \\\\ 4500=\frac{0.15(V-45)}{0.003} \\\\ V = -135 \ m/sec[/tex]

Hence,the velocity of ball coming off the bat will be -135m/s.

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Answer:

The answer is 45 degree angle

Answer:

1. Voltage across 600 pF is 10 V.

2. Voltage across 300 pF is 20 V.

3. Voltage across 200 pF is 30 V.

Explanation:

We'll begin by calculating the total capacitance of capacitor. This can be obtained as follow:

Capicitance 1 (C₁) = 600 pF

Capicitance 2 (C₂) = 300 pF

Capicitance 3 (C₃) = 200 pF

Total capacitance (Cₜ) =?

1/Cₜ = 1/C₁ + 1/C₂ + 1/C₃

1/Cₜ = 1/600 + 1/300 + 1/200

1/Cₜ = 1 + 2 + 3 / 600

1/Cₜ = 6/600

1/Cₜ = 1/100

Cₜ = 100 pF

Next, we shall convert 100 pF to Farad (F). This can be obtained as follow:

1 pF = 1×10¯¹² F

Therefore,

100 pF = 100 pF × 1×10¯¹² F / 1 pF

100 pF = 1×10¯¹⁰ F

Thus, 100 pF is equivalent to 1×10¯¹⁰ F.

Next, we shall determine the charge. This can be obtained as follow:

Voltage (V) = 60 V

Capicitance (C) = 1×10¯¹⁰ F

Charge (Q) =?

Q = CV

Q = 60 × 1×10¯¹⁰ F

Q = 6×10¯⁹ C

1. Determination of the voltage across 600 pF.

Capicitance 1 (C₁) = 600 pF = 6×10¯¹⁰ F

Charge (Q) = 6×10¯⁹ C

Voltage 1 (V₁) =?

Q = C₁V₁

6×10¯⁹ = 6×10¯¹⁰ × V₁

Divide both side by 6×10¯¹⁰

V₁ = 6×10¯⁹ / 6×10¯¹⁰

V₁ = 10 V

2. Determination of the voltage across 300 pF.

Capicitance 2 (C₂) = 300 pF = 3×10¯¹⁰ F

Charge (Q) = 6×10¯⁹ C

Voltage 2 (V₂) =?

Q = C₂V₂

6×10¯⁹ = 3×10¯¹⁰ × V₂

Divide both side by 3×10¯¹⁰

V₂ = 6×10¯⁹ / 3×10¯¹⁰

V₂ = 20 V

3. Determination of the voltage across 200 pF.

Capicitance 3 (C₃) = 200 pF = 2×10¯¹⁰ F

Charge (Q) = 6×10¯⁹ C

Voltage 3 (V₃) =?

Q = C₃V₃

6×10¯⁹ = 2×10¯¹⁰ × V₃

Divide both side by 2×10¯¹⁰

V₃ = 6×10¯⁹ / 2×10¯¹⁰

V₃ = 30 V

Answer:

C2H6 up the road to be with its own in

Answer:

1.after

2.approaching

3.cruise

4.turning

Explanation:

if wrong sorry

A heavy ball moving quickly will have the most momentum

The right option is  D. A heavy ball moving quickly.

This can be defined as the product of the mass of a body and its velocity.

The S.I unit of momentum is kgm/s.

The formula of momentum is

Where:

From the formula above, it can be seen that momentum is directly proportional to

Therefore, A heavy ball moving quickly will have the most momentum

Hence, the right option is  D. A heavy ball moving quickly.

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590 Hz is the answer to the question

An ambulance siren has a frequency of 650 Hz and is moving away from you at 35 m/s. What frequency will you perceive? Use 346 for the speed of sound.

Answer:

59.71 Hz

Explanation:

Frequency: 650 Hz

Velocity: 35 m/s

Speed of sound: 346

f = f(v / v + speed of sound)

f = 650(35 / 35 + 346)

Evaluate and you would perceive a frequency of 59.71 Hz

Answer:

The Kidneys

Explanation:

The Kidneys remove the toxic stuff that you dont need anymore. Therefore the kidneys rather than the everything else removes blood and toxic waste.

Answer:

A. Nuclear fusion requires very high pressures and temperatures.

Explanation:

Nuclear fusion requires very high pressures and temperatures  is one way that nuclear fusion differs from nuclear fission. Hence option A is correct.

Nuclear fission and fusion processes are the two basic types of nuclear reactions. Nuclear fusion is a process in which two or more light nuclei collide to generate a heavier nucleus. Nuclear fusion occurs in elements with a low atomic number, such as hydrogen. Nuclear fusion is the inverse process of nuclear fission, in which heavy atoms disperse and generate lighter elements. Nuclear fusion and fission both yield enormous amounts of energy.

A nuclear process in which atomic nuclei of low atomic number fuse to generate a heavier nucleus, releasing energy.

Because of nuclear fusion, every star in the cosmos, including the sun, is alive. They generate massive amounts of heat as a result of this activity.

Fission is a nuclear process that occurs when a heavy nucleus breaks spontaneously or when it collides with another particle, releasing energy. Nuclear fission occurs when the nucleus of an atom breaks into lighter nuclei as a result of a nuclear reaction. This decay can occur naturally as a result of radioactive decay, or it can be replicated in a laboratory by attaining the requisite circumstances (bombarding with neutrinos). The resultant pieces have a lower total mass than the original. In the preceding process, the missing mass is turned into nuclear energy.

Hence option A is correct. it requires high pressure and high temperature and it occurs in sun.  

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Answer:

in the parallel connection the light bulbs shine less than in the series connection

Explanation:

In a series circuit the current through the whole circuit is the same, therefore the power (brightness) of each bulb is

           P = i² R

where R is the resistance of each bulb and i the current of the circuit.

If we connect the light bulbs and the cells in parallel, the current in the circuit is the sum of the east that passes through each light bulb,

            i = i₁ + i₂

if the two light bulbs are the same

           i = 2 i₁

           i₁ = i / 2

so the power of each bulb is is

           P = i₁² R

           P = R i² / 4

           P = ¼ P_initial

Therefore we see that in the parallel connection the light bulbs shine less than in the series connection

Answer:

newton's first law hope this helped

Answer:

Hdgdjdiehebhsiducggdgdhduudhd

Answer:

Time = 12.27seconds

Explanation:

Given

Speed = 25miles/hour

Distance = 150 yards = 150(0.000568182)miles

Distance (in miles) = 0.0852273miles

Get the time

Speed = Distance/Time

Time = Distance/Speed

Time = 0.0852273/25

Time = 0.0034hours

Time = 0.0034 * 3600secs

Time = 12.27seconds

Answer:

Total resistance is 96 ohm

Explanation:

Rs = R1 +R2 + R3 + R4 + R5 +R6 + R7 + R8

where R1 is lamp 1

R2 is lamp 2 n so on

Rs = 12 + 12 +12 + 12 +12 + 12 + 12 + 12( as each lamp is of resistance 12)

Rs = 96 ohm

GOOD LUCK FOR THE FUTURE! :)

Answer:

120.48hz

Explanation:

f=1/t..........

Either the wavelength, velocity, or wave period—the amount of time it takes for a wave cycle to complete—must be known. If you know the period, divide 1 by it and, if necessary, convert it to seconds. The outcome will be the frequency in Hertz.

As with all waves, the relationship between the speed of sound, its frequency, and its wavelength is vw=f, where vw is the speed of sound, f is the frequency, and is the wavelength.It is necessary to know either the wavelength, the velocity, or the wave period, which is the duration of a wave cycle.

Therefore, More oscillations are produced at higher frequencies. Hertz are the frequency measurement units (Hz). Noises between 20 Hz and 20,000 Hz can be heard by those with normal hearing. Ultrasound is a term for frequencies greater than 20,000 Hz.

Learn more about sound waves here:

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Answer:

O bike tires on the road as you ride

Explanation:

is the rolling friction

Answer:

B. Bike tires on the road as you ride

Explanation:

Please give brainliest!

Answer:

The mass of an object affects gravity.

Explanation:

Answer:

The mass of an object affects gravity.

Explanation:

Answer:

How muen population lives in the South

Answer:

How many people live in the South

I'm not sure about the first one sorry

Answer:

30 neutrons

Explanation:

A neutral iron atom contains 26 protons and 30 neutrons plus 26 electrons in four different shells around the nucleus. As with other transition metals, a variable number of electrons from iron's two outermost shells are available to combine with other elements.

Answer:

There is not such thing as SI unit of meter

Meter is SI unit for length

Answer:

net force= 2000-1000=1000

a=v-u/t=5/20=1/4

m=?

m=f/a

=1000÷1/4=4000kg

Answer:

Concave mirror

Explanation:

Because as we move the object far away from the mirror the image gets inverted