If the soccer ball has a mass of 284g, and gravitational force is 9.81 m/s2 on Earth, what is the weight of the soccer ball?
If the watermelon has a mass of 850g, and gravitational force is 9.81 m/s2 on Earth, what is the weight of the watermelon?
Which will hit the ground first?
Answer:
2.79 N8.34 NWatermelonExplanation:
Weight of soccer ball
Weight = mass (in kg) × gravitational forceWeight = 284 x 10⁻³ x 9.81Weight = 0.284 x 9.81Weight = 2.79 N (approximately)Weight of watermelon
Weight = mass (in kg) x gravitational forceWeight = 850 x 10⁻³ x 9.81Weight = 0.85 x 9.81Weight = 8.34 N (approximately)As the watermelon has more weight, it will hit the ground first.
What is the difference between heat capacity and specific heat?
don't spam -_++
Heat capacity is the amount of heat required to raise the temperature of an object by 1oC. The specific heat of a substance is the amount of energy required to raise the temperature of 1 gram of the substance by 1oC.
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Can someone please answer this, ill give you brainliest Would be very appreciated.
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Weather
Explanation:
As during climate only one season change to another and it's a long period of time
while in weather it's can change into any season for few days depending on the relief of the area.
Answer:
weather
Explanation:
There is often confusion between weather and climate. Weather is the condition of the atmosphere at a particular place over a short period of time.
DOES THE SUN CONTAIN NUCLEAR ENERGY?
Answer: yes
Explanation: it's fueled by nuclear reactions that fuse hydrogen atoms together into helium and other heavier elements, releasing huge amounts of energy in the process.
12
9. An empty, massless cube is measured to have all sides equal to 11 cm. It is floating in water and will slowly be filled with sand
that has a density of 3.5 g/cm'. What volume of sand will cause the box to sink?
Answer:
See below ~
Explanation:
An object will sink in water when its density is greater than that of water, which is 1 g/cm³.
Volume of the box is 1331 cm³. (11³)
Maximum mass of sand will be 1331 g. [because 1331/1331 = 1 g/cm³]
Volume of sand = Mass of sand / Density of sandVolume (sand) = 1331/3.5Volume (sand) = 380.29 cm³If the volume of sand is greater than 380.29 cm³, the box will sink in water.
What is the voltage in a cirucit with a current of 3.0 amps and a resistance of 2.0 Ohms?
Answer:
6 v
Explanation:
V = IR
= 3 A * 2 ohm = 6 v
how deep under water would you need to be in order to be at double atomosphric pressure
Answer:
You would need to be 33 feet deep.
Explanation:
What is the potential difference if the current of 2A flow in 5sec in wire,total energy in wire to flow the charge is 500J.please its urgent.
Given the total energy in the wire, current and time elapsed, the potential difference is 50 Volts.
What is the potential difference?The electric power is expressed as P = VI.
Where V is the potential difference, I is the electric current and P is the electric power.
Also, the consumption of energy per unit of time is called power. It is expressed as P = E / t
Given that;
Current I = 2.00AElapsed time t = 5sTotal energy E = 500JFirst, we determine the power.
P = E / t
P = 500J / 5s
Power = 100W
Next, we determine the potential difference.
P = V × I
V = P / I
V = 100W / 2.00A
V = 50V
Given the total energy in the wire, current and time elapsed, the potential difference is 50 Volts.
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The Potential difference is 50 Volts.
What is the potential difference?The potential difference is a measure of the energy given to the charge carriers in a circuit
We know that the electric power is expressed as P = VI.
V is the potential difference
I is the electric current
P is the electric power.
Also we know that power is expressed as P = E / t
Given
Current( I) = 2.00A ,time t = 5s
Total energy E = 500J
To find the power
P = E / t = 500J / 5s = 100W
Now , To find the potential difference.
P = V × I (By rearranging it)
V = P / I
V = 100W / 2.00A = 50 V
Therefore , the total energy in the wire, current and time elapsed, the potential difference is 50 V.
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Which direction will the box move?
Net force
F1-F2-F35-10-205-30-25NAs it's negative the box will move left
Before you start your engine, __________ A. adjust the seat so you can reach all controls. B. make sure your car is in reverse or neutral gear before starting the engine. C. move your car before you have looked in front, behind and to the side for pedestrians and oncoming traffic. D. all of the above
Answer:
A. adjust the seat so you can reach all controls
------------------------------------------------------
This is so you can reach the gas petal, break petal, steering wheel, (and other things) easier so you won't have to lean forward and it makes it easier for when you're driving. Especially if you need to quickly press your breaks, you'll be able to do this a lot faster if you're closer to them than if you had to reach in order to do so.
I hope this helped, im not the best at explaining things lol
Why is it not easy to witness
inertia on Earth?
A. Magnetism is much stronger.
B. Gravity and friction are always acting on
objects.
C. Our mass is too small.
D. Our mass is too large.
When two objects made of different materials are rubbed together, they will attract each other after the charging process.Immersive Reader (1 Point) True False
Answer:
True
Explanation:
because their is friction(e.g take a ruler rub it in your hair then put it on top of a piece of paper on the table then u will see the process)among the two objects.
One evening, a student tells her sister that the Sun only appears brighter than other stars because the Sun and stars are different distances from Earth. Her sister disagrees, so the student supports her argument by asking her sister to observe the brightness of streetlights throughout their neighborhood. Which observation would support the student’s argument?
Comparing and analyzing the brightness of near and farther streetlight would support the student’s argument.
Which observation would support the student’s argument?The brightness of nearer streetlight is more as compared to the brightness of the farther light because brightness decreases with the increase in distance.
So we can conclude that comparing and analyzing the brightness of near and farther streetlight would support the student’s argument.
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Is a cow a producer? Or a consumer or decomposer?
Answer:
cows a consumer
Explanation:
because it can make food by its own
Which best explains horatio’s error? magnetism is not produced by electric currents unless the wire is coiled. the magnetic field does not continually spread outward from the wire. the magnetic field is produced inside the wire, not outside of it. magnetism is only produced when a metal bar is placed near the wire.
What best explains Horatio’s error is the magnetic field does not continually spread outward from the wire. Option B. This is further explained below.
What is a Magnetic field?Generally, a Magnetic field is simply defined as an area of magnetism that exists around a magnetic substance or a moving electric charge.
In conclusion, The magnetic field does not continuously expand outward from the wire, which best explains Horatio's miscalculation.
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Answer:
B
Explanation:
A uniform conducting rod of length 23 cm has a potential difference across its ends equal to 66 mV (millivolts). What is the magnitude of the electric field inside the conductor in units of N/C
The magnitude of the electric field inside the conductor will be 0.208 N/C.
What is an electric field?An electric field is an electric property that is connected with any location in space where a charge exists in any form. The electric force per unit charge is another term for an electric field.
Given data;
length of rod = 25 cm = 0.25 m
Potential Difference = 52 mV = 0.052 Volts
The electric field is found as the ratio of the potential difference and the length;
[tex]\rm E =\frac{0.052}{0.25} \\\\ E=0.208 \ N/C[/tex]
Hence,the magnitude of the electric field inside the conductor will be 0.208 N/C.
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Which of these elements would be the best
semiconductor?
O Ar
O Se
O Rh
O Po
Answer
Its PO
Explanation:
I got it right on Edge.
The half-life of radium-226 is 1,600 years and the half-life of carbon-14 is 5,730 years. In 1-2 sentences, mathematically prove that the decay constant for radium-226 is larger than the decay constant for carbon-14.
The decay constant for radium-226 is larger than the decay constant for carbon-14 due to its obtained value.
What is the rate of decay?
The reduction in the number of radionuclides per unit time is the rate of decay.
The decay constant of the radium-226 is;
[tex]\lambda_1=\frac{ 16}{100}\times 266 \\\\ \lambda_1= -36.16[/tex]
The decay constant of the carbon-14 is;
[tex]\lambda_2=\frac{ -57.3}{100}\times 14 \\\\ \lambda_1= -802.2[/tex]
Hence, the decay constant for radium-226 is larger than the decay constant for carbon-14.
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Answer:
0.693/1600 > 0.693/5730
Explanation:
The decay constant is the reciprocal of the time it takes for the radioactivity to decline to about 36.8% of its original value. It is the value of k in the multiplier e^(-kt), which tells the fraction remaining after time t.
When compared to the half-life, h, the value of k is ...
k = 0.693/h . . . . . decay constant for half-life h
Effectively, the decay constant is proportional to the inverse of the half-life. The constant of proportionality is ln(2) ≈ 0.693.
__
decay constant for radium-226:
0.693/1600 ≈ 4.33×10^-4
decay constant for carbon-14:
0.693/5730 ≈ 1.21×10^-4
Since 4.33×10^-4 is greater than 1.21×10^-4, the decay constant of radium-226 is larger than that of carbon-14.
_____
Additional comment
Taking the reciprocal of a positive number reverses the ordering:
1600 < 5730
1/1600 > 1/5730
The half-life of radium-226 is less than that of carbon-14, so its decay constant will be larger.
a.5 kg model rocket launches with a thrust of 5 n in the upward direction. can it lift off of the ground? (hint: gravity is pulling it toward
the earth at 9.8 m/s2) (f=mx a) assume there is no wind resistance.
Answer:
F = F2 - F1 where F is the net force upwards
F = 5 - (.5 * 9.8) = (5 - 4.9) N = .1 N
Since there is a net force in the upwards direction the rocket should experience an upwards acceleration.
What is one way that light waves differ from sound waves?(1 point)
Identify which portions of the electromagnetic spectrum are used in each of the devices listed. a. a microwave oven b. a television set c. a single-lens reflex camera
The portions of the electromagnetic spectrum are used in the television set. It is used in the picture tube in the old television set.
What is the electromagnetic spectrum ?The electromagnetic radiation distribution in accordance with the frequency or wavelength is known as the electromagnetic spectrum.
The portions of the electromagnetic spectrum are used in the television set. It is used in the picture tube in the old television set.
Hence, option b is correct.
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Can someone please answer this, ill give you brainliest Would be very appreciated.
Answer:
Option D
Explanation:
The plant burning induces the rate of smokes It also releases carbon dioxide to air with additional to black smokes.As it's released to atmosphere the amount of CO_2 also increases.Option D is correct
True or false: when two objects are rubbed together they both will have either a positive charge or both be negatively charged. Causing them to then repel each other. (1 Point) True False not enough information Maybe
Answer:
true
Explanation:
because rubbing together they will both have friction
Emotional elevation only occurs in animal kin groups. please select the best answer from the choices provided t f
Emotional elevation can occur in individuals or in groups, therefore, it is false that emotional elevation only occurs in animal kin groups.
What is emotional elevation?Emotional elevation is the process whereby the moods of individuals are elevated due to their interactions with others or due to other factors.
Emotional elevation can occurs in individual animals or those on animal kin groups.
Therefore, it is false that emotional elevation only occurs in animal kin groups.
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Answer:
F
Explanation:
At what time did time begin
50 points :)
Answer:
According to the standard big bang model of cosmology, time began together with the universe in a singularity approximately 14 billion years ago.
Explanation: the big bang
Answer:
approximately 14 billion years ago
A common practice for a person with a high fever is to take a bath in cool water. Assuming an 80 kg person is really ill and needs to cool down from 40°C to 37°C. What is the minimum amount of water needed for bathing assuming the water begins at room temperature, 25°C?
The minimum amount of water needed for bathing assuming the water begins at room temperature is 16.58kg.
What is thermal equilibrium?When two bodies at different temperature come into contact, they share the heat through conduction. After some time, temperature of both becomes equal. This condition is said to be a body in thermal equilibrium with other.
Heat gained by the water = heat lost by the ill person
m x Cw x ΔT = M x Cp x Δt
where, mass of person M = 80kg, Cp =specific heat of body =3470, specific heat of water Cw= 4186, then mass of water m will be
m x 4186 x (37-25) =- 80 x 3470 x (37-40)
m = 16.58kg
Thus, the mass of water needed is 16.58kg.
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A 9-volt battery is connected to a 4-ohm resistor and a 5-ohm resistor as shown in the diagram above. How much current flows through the 4-ohm resistor?
1.0 A
1.8 B
2.3 C
4.0 D
The current flowing in the 4 ohms resistor connected in series with 5-ohm resistor is determined as 1.0 A.
Equivalent resistance of the circuit
The equivalent resistance of the circuit is determine as follows;
Rt = R1 + R2
Rt = 4 ohms + 5 ohms = 9 ohms
Current flowing in the 4 ohms resistorThe current flowing in the 4 ohms resistor is determined from Ohms law as shown below;
V = IR
I = V/R
I = 9/9
I = 1.0 A
Since the circuit is in series arrangement, same current will flow in 5 ohm and 4 -ohm.
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What spectrum can humans see? What does it break into? What is the order of color?
Answer:
the rainbow spectrum. red orange yellow green blue violet. It breaks into ultra violet.
Explanation:
The masses of two objects are 2 kg and 8 kg, respectively.If their kinetic energies are in 2:1 proportion, the ratio of their speeds is ___.
√2 :1
1:2
2√2 :1
Let's see
[tex]\\ \rm\Rrightarrow \dfrac{KE_1}{KE_2}=\dfrac{2}{1}[/tex]
[tex]\\ \rm\Rrightarrow \dfrac{0.5(2)v_1^2}{0.5(8v_2^2)}=\dfrac{2}{1}[/tex]
[tex]\\ \rm\Rrightarrow \dfrac{v_1^2}{4v_2^2}=\dfrac{2}{1}[/tex]
[tex]\\ \rm\Rrightarrow v_1^2=8v_2^2[/tex]
[tex]\\ \rm\Rrightarrow \dfrac{v_1^2}{v_2^2}=\dfrac{8}{1}[/tex]
[tex]\\ \rm\Rrightarrow \dfrac{v_1}{v_2}=\dfrac{2\sqrt{2}}{1}[/tex]
[tex]\\ \rm\Rrightarrow v_1:v_2=2\sqrt{2}:1[/tex]
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Please help, im stuck on this question
Answer:
A) .27 A
Explanation:
v = ir
i = v/r
equivalent r = 45 * 90 / (45+90) = 30 ohms ( for the two r in parallel)
i = 8v / 30 ohm = 267 mAmps
