Hypothesis after observation.
(v) A car
A car is pulled with a force of 60.N at angle of 30 ron, the
horizontal. Find the vertical and horizontal components of the applied
force.
Answer:
Explanation:
The vertical component is found in the magnitude of the force times the sine of the angle; the horizontal component is found in the magnitude of the force times the cosine of the angle. Thus:
vertical component = [tex]60.0sin(30.0)=30.0[/tex] and
horizontal component = [tex]60.0cos(30.0)=52.0[/tex]
The name of the SI unit for force is the watt
\
Explanation:
The name of the SI unit for force is NEWTON .
ur statement is false
have a nice day
in what state of matter can conduction occur.
Answer: Conduction occurs more readily in solids and liquids, where the particles are closer to together, than in gases, where particles are further apart.
Answer:
conduction occurs when gas becomes liquid.
A cylinder has length "L" and area of cross-section "A" what is its volume
Answer:
[tex]{ \tt{volume = \pi {r}^{2} h}}[/tex]
leck.com/student/tutdcithp
You do: What is the Gravitational Potential Energy of a
120kg person who jumped out of a plane 4500m in the
air?
G
U
s
M
KE = 12my
GPE = mgh
Answer:
P = 5292 kJ
Explanation:
Given that,
The mass of a person, m = 120 kg
The height of the plane, h = 4500 m
The Gravitational Potential Energy of the person is given by :
P = mgh
Put all the values,
P = 120 kg × 9.8 m/s² × 4500 m
= 5292000 J
or
= 5292 kJ
So, the required gravitational potential energy is 5292 kJ.
PLS HELP DUE TODAY
A group of Ontario farmers form a cooperative group and build a factory that turns corn into a fuel for generators and cars. Would this energy source be renewable or non-renewable? Explain.
Answer:
renewable, you can keep growing corn for it. more fossil fuel can be made by nature but it takes way too long to be considered renewable
An increase in speed or velocity can be described as:
Answer:
acceleration
rhymes with accelerator
Explanation:
the increase/decrease or the sudden change in speed and direction of object
A battery-powered set of five patio lanterns is connected in series. An ammeter measures the current through the battery as 0.75 A. The total resistance of the circuit is 52 0. (a) Calculate the voltage drop across the battery. (b) Calculate the voltage drop across each load.
(a) 39 V
(b) 7.8 V
Explanation:(a) Neglecting the internal resistance of the battery, the voltage drop (V) across the battery is found from Ohm's law as follows;
V = IR -------------------------(i)
Where;
I = current through the battery
R = total resistance of the circuit.
From the question;
I = 0.75A
R = 52.0Ω
Substitute the values of I and R into equation (i)
=> V = 0.75 x 52.0
=> V = 39Volts
Therefore, the voltage drop across the battery is 39 Volts
(b) Since the set of lanterns is connected in series, then the same current flows through each of the lanterns. Also, since the lanterns are identical, the resistance ([tex]R_{L}[/tex]) of each of them is given by the total resistance (R = 52.0Ω) divided by the number of lanterns. i.e
[tex]R_{L}[/tex] = [tex]\frac{52.0}{5}[/tex]
[tex]R_{L}[/tex] = 10.4Ω [Each lantern has a resistance of 10.4Ω]
The current flowing through them is the same as the current (I = 0.75A) flowing the circuit.
Therefore, using Ohm's law, the voltage drop ([tex]V_L[/tex])across each load (lantern) is
[tex]V_L[/tex] = I x [tex]R_{L}[/tex]
[tex]V_L[/tex] = 0.75 x 10.4
[tex]V_L[/tex] = 7.8Volts
Therefore, the voltage drop across each load is 7.8 Volts
The physical quantity represented as rate of change of change in position in a
particular direction.
a) Speed
b) Velocity
c) Average speed
d) acceleration
Answer:
B
rate of change of its position with respect to a frame of reference, and is a function of time.
An electrical heating coil is immersed in 4.6kg of water 22°C.The coil, which has a resistance of 250Ω, warms the water to 32°C in 15min. What is the potential difference at which the coil operates?
Answer:
242.4 V
Explanation:
Applying,
Q = cm(t₂-t₁)................ Equation 1
Where Q = amount of heat, c = specific heat capacity, m = mass, t₁ = initial temperature, t₂ = final temperature.
But this heat is produced by electrical power
Therefore,
P = Q/t
Where P = Electrical power, t = time
Also,
P = V²/R
Where V = voltage, R = resistance
Therefore
V²/R = Q/t......................... Equation 2
Substitute equation 1 into equation 2
V²/R = cm(t₂-t₁)/t................. Equation 3
Given: R = 250 ohms, m = 4.6 kg, t₁ = 22°C, t₂ = 32°C, t = 15 min. = (15×60) = 900 seconds
Constant: c = 4600 J/kg.°C
Substitute these values into equation 2
V²/250 = 4600(4.6)(32-22)/900
V²/250 = 235.11
V² = 250×235.11
V² = 58777.78
V = √58777.78
V = 242.4 V
Answer this question fast please
The frequency of a musical note is increased. A student hearing the sound detects an increase in which property?
Answer:
B. pitch of the sound is the answer <333
A 10 kg bowling ball is lifted from the ground to a height of 1 meter. Assuming the bowling alley is on Earth, which type of potential energy is stored in a ball and why? Class 6
gravitational potential energy because the ball move towards the earth and to balance the weight of the ball so it moves in the right direction
is James Charles a boy or a girl ? I am so confused
Answer:
both
Explanation:
and I'm serious he is literally both
A 2kg ball is attached to a 0.80m string and whirled in a horizontal circle at a constant speed of 6m/s .the work done on the ball during each revolution is.
Answer:
work done = kinetic energy in a SHM
= 1/2mW²r²
but ; w = v/r
therefore ; w:d = 1/2mv²/r² × r²
= 1/2 mv²
= 1/2 × 2×6²
= 36J
Fiona followed these steps for a scientific investigation: 1. Collect baking soda and vinegar 2. Pour baking soda into a bowl. 3. Pour vinegar into the bowl. 4. Record observations Choose the statement which shows what Fiona is most likely investigating. This mixture will cause a physical and chemical change to the bowl. Mixing baking soda and vinegar will cause a physical and chemical change. Combining baking soda and vinegar will cause a chemical change. Combining baking soda and vinegar will cause a physical change.
Answer: The correct statement is combining baking soda and vinegar will cause a chemical change.
Explanation:
A chemical reaction is defined as the reaction in which two or more chemical substances react to form two or more different chemical substances
A new substance (product) is formed in a chemical reaction when the bonds between the reactants are broken so that the new bonds between the products can be formed.
A physical process is defined as the process in which the physical state of matter takes place. Like, in the process of vaporization, a liquid state changes to the gaseous state without changing the composition of species.
When baking soda (Sodium bicarbonate) is reacted with vinegar (acetic acid), it leads to the formation of sodium acetate, water, and carbon dioxide.
A new compound is getting formed in this process which is denoted by the chemical equation:
[tex]NaHCO_3+CH_3COOH\rightarrow CH_3COONa+H_2O+CO_2[/tex]
Hence, the correct statement is combining baking soda and vinegar will cause a chemical change.
True or False. Friction is a non-contact force?
( please answer !! i’ll mark brainliest! )
Answer:
False
Explanation:
Friction is a force exerted by a surface against the motion of a body across its surface. Therefore, friction is a type of contact force only.
What is the main energy source that causes changes in the atmosphere of Earth?
A. fossil fuels
B. the moon
C. the sun
D. greenhouse gases
Answer:
C is the correct answer.
Having greater or less electrons possessed by an object. Can attract or repel.
A. proton
B. magnetism
C. charge
D.magnet
Answer:
A. Proton
Explanation:
Given that an electron has a net negative charge equal in magnitude to the charge of a proton (1.602 × 10⁻¹⁹) but having an opposite (negative) sign to that of a proton, and given that like charges (negative to negative) repel and unlike charges attract, an object having;
Greater electron will be negatively charged relative to the other object, to which it is compare, which is a proton will attract the (positively charged) proton
Lesser negative charge compared to the proton; therefore, both objects will be positive, and they will repel each other
We therefore have;
Having greater or less electrons possessed by an object. Can attract or repel a proton
The correct option is option A. proton
( Just answer 1 & 2) Please help! This is the last thing I have to do. I will mark brainliest asap!!
Answer:
1. Formula = distance/time
D= 112.0 meters, time =4 secs
Speed = d/t =112.0/4
= 28m/s
2.Formula = distance/time
D= 1/4 x 16093.44 m
= 402.35m
Time = 15secs
Speed= d/t
= 402.35/15
=26m/s
A hippopotamus laying on the rock exerts 10,000 N on the rock. The rock has a mass of
2 tons. How much work is being done? Be sure to show your work.
Answer:
Explanation:
If the hippo is laying on the rock, I'm assuming that there is no movement going on at all, in either the hippo or the rock. If no movement occurs, there is no work being done.
Select the vocabulary term that best matches this definition.
Continual rise in the average temperature of Earth's climate system due to the increase of greenhouse gasses in the atmosphere. The rise in Earth's average surface temperature •Fracking
•Global Warming
•Transverse Wave
•Transmission
Answer:
global warming
Explanation:
cuz duh.... .....
Which of the following physical quantity is having same SI units?
a) Speed and average speed
b) Speed and velocity
c) Speed and average velocity
d) All the above
Answer:
d) All the above
Explanation:
Speed SI unit is metre per second.Velocity SI unit is metre per second.Average speed SI unit is metre per second.Average velocity SI unit is metre per second.Therefore, as all of the physical quantities have the same SI units, the answer is d) all of the above.
difference between local system and si system
Answer:
In antiquity, systems of measurement were defined locally: the different units might be defined independently according to the length of a king's thumb or the size of his foot, the length of stride, the length of arm, or maybe the weight of water in a keg of specific size, perhaps itself defined in hands and knuckles.
Systems of Measurement: there are two main systems of measurement in the world: the Metric (or decimal) system and the US standard system. ... The US Standard system uses units that have no predictable relationship to each other. For example, there are 2 cups in a pint, but 4 quarts in a gallon.
The image shows a model of the gravitational field around Earth.
Which best describes the model?
Answer:
B not to sure tho sorry
Explanation:
sorry
Answer:it is b.
Explanation:only answer that makes sense :)
Ponds and lakes are part of marine ecosystem.
True or false ?
Answer:
True
Explanation:
because they can hold marine organism inside
A small 175-g ball on the end of a light string is revolving uniformly on a frictionless surface in a horizontal circle of diameter1.0 m.
Complete question:
A small 175-g ball on the end of a light string is revolving uniformly on a frictionless surface in a horizontal circle of diameter 1.0 m. The ball makes 2.0 revolutions every 1.0 s. What are the magnitude and direction of the acceleration of the ball?
Answer:
The acceleration of the ball is 78.98 m/s², directed inwards
Explanation:
Given;
mass of the ball, m = 175 g
radius of the circle, r = 0.5 m
angular speed of the ball, ω = 2 rev/s
The magnitude of the centripetal acceleration of the ball is calculated as follows;
[tex]a_c = \omega^2 r\\\\where;\\\omega \ is \ angular \ speed \ in \ rad/s\\\\a_c = (2\ \frac{rev}{s} \times \frac{2\pi \ rad}{1 \ rev} )^2 \times (0.5 \ m)\\\\a_c =78.98 \ m/s^2[/tex]
The centripetal acceleration is directed inwards.
Un hombre parado en el techo de un edificio, tira una bola verticalmente hacia arriba con una velocidad de 12m/s, la bola llega al suelo en 4s. ¿que altura tiene el edificio ?
Respuesta:
24m
Explicación:
Según la ecuación de movimiento
v = u + en
Dado
Velocidad final v = 12 m / s
velocidad inicial u = 0 m / s
tiempo t = 4s
Sustituir
12 = 0 + 4a
a = 12/4
a = 3 m / s²
Lo siguiente es obtener la distancia;
S = ut + 1 / 2at²
S = 0 (4) + 1/2 (3) (4) ²
S = 3 * 16/2
S = 48/2
S = 24 m
Por lo tanto, la distancia requerida es de 24 m.
Relativistic velocity is of the order of _____ of velocity of light A- 1/15th of the velocity of light B-1/20th of the velocity of light C-1/10th of the velocity of light
Answer:
Relativistic velocity is of the order of 1/10th of the velocity of light
Explanation:
We define relativistic speed (or velocity) as a speed that is a significant fraction of the speed of light: c = 3*10^8 m/s
Such that for these speeds, the special relativity theory starts to apply (the relativity effects starts to apply).
Usually, we define relativistic speeds as those that are of the order (or larger) of c/10, which is one-tenth of the speed of light.
Then the correct option is C:
Relativistic velocity is of the order of 1/10th of the velocity of light
A book with a mass of 2 kg sits on top of a book shelf at a height of 3 m. How much potential energy does the book have
Answer:
Answer is 98 joules
Explanation:
P. E=2*9.8*3=98
S.i unit of potential energy ⚡ is joules
So answer is 98 joules
