Answer:
a) F = 250 [N]
Explanation:
Force can be calculated by means of Newton's second law, which tells us that force is the product of mass by acceleration.
a)
F = m*a
where:
F = force [N]
m = mass = 25[kg]
a = gravity acceleration = 10 [m/s²]
F = 25*10 = 250 [N]
Yes, this force would be different on Mars, since the gravitational acceleration of Mars is different from that of Earth.
gm = Martian gravity = 3.72 [m/s²]
Fm = 3.72*25 = 93 [N]
is heat the same as thermal energy?
Answer:
To be 100% honest im nkt sure but I'm gonna take a gander. yes i think it is the same
Answer:
Yes heat is the same as thermal energy
Explanation:
Heat is the same thing as thermal because Thermal energy refers to the energy contained within a system that is responsible for its temperature. Heat is the flow of thermal energy. A whole branch of physics, thermodynamics, deals with how heat is transferred between different systems and how work is done in the process (see the 1ˢᵗ law of thermodynamics).
Add the following vectors together:
35 km at 25 degrees N of E
15 km at 10 degrees E of N
Answer:
The resultant vector is 45.3 N 40.74° North of East
Explanation:
The given vectors can be presented as follows;
35 km at 25 degrees N of E = 35 × cos(25)·[tex]\mathbf{\hat i}[/tex] + 35 × sin(25)·[tex]\mathbf{\hat j}[/tex]
15 km at 10 degrees E of N = 15 × cos(90 - 10)·[tex]\mathbf{\hat i}[/tex] + 15 × sin(90 - 10)·[tex]\mathbf{\hat j}[/tex]
15 km at 10 degrees E of N = 15 × cos(80)·[tex]\mathbf{\hat i}[/tex] + 15 × sin(80)·[tex]\mathbf{\hat j}[/tex]
The sum of the vectors becomes;
∑d = 35 × cos(25)·[tex]\mathbf{\hat i}[/tex] + 15 × cos(80)·[tex]\mathbf{\hat i}[/tex] + 35 × sin(25)·[tex]\mathbf{\hat j}[/tex] + 15 × sin(80)·[tex]\mathbf{\hat j}[/tex]
∑d ≈ 34.33·[tex]\mathbf{\hat i}[/tex] + 29.56·[tex]\mathbf{\hat j}[/tex]
The magnitude of the resultant vector = √(34.33² + 29.56²) ≈ 45.3 N
The direction = tan⁻¹(29.56/34.33) ≈ 40.74° North of East
The resultant vector = 45.3 N 40.74° North of East
Why is the Ring of Fire a very geologically active part of the earth?
Question options:
The dense Pacific plate is being subducted from multiple directions.
The plates surrounding the Pacific are diverging and increasing the size of the Pacific plate.
The Pacific plate is surrounded by a hot spot.
QUICK PLEASE HELP I’ll GIVE BRAINLIEST
Answer:
The value of the charge is 6 c. Option c.
Explanation:
Electric Field
The electric field is defined as the force per unit charge that would experience a small positive test charge if held at some point in space.
The force F on a charge q at any point in space is equal to the product of the charge and the electric field E at that point .
[tex]F=q\cdot E[/tex]
Since we know the value of the electric field E=6\ N/c and the force F=36 N experienced by a certain charge q, we can solve the above equation for q:
[tex]\displaystyle q=\frac{F}{E}[/tex]
[tex]\displaystyle q=\frac{36\ N}{6\ N/c}[/tex]
q=6 c
The value of the charge is 6 c. Option c.
DESPERATE WILL GIVE BRAILIST
Which types of rocks can become metamorphic rock?
A. clastic sedimentary rock
B. both igneous and sedimentary rock
C. clastic or chemical sedimentary rock
D. both igneous and metamorphic rock
Answer:
i think the answer could be both B. and D. bc any type of rock can become a metamorphic rock with right conditions
Explanation:
A metamorphic rock, on the other hand, began as a rock—either a sedimentary, igneous, or even a different sort of metamorphic rock. Then, due to various conditions within the Earth, the existing rock was changed into a new kind of metamorphic rock.
Answer:
B.) Both Igneous and Sedimentary rock
Explanation:
Since Metamorphic rocks can form from either Igneous or Sedimentary rocks. Since the sedimentary particles from which sedimentary rock is formed can be derived from a metamorphic, igneous, or another sedimentary rock, all three rock types can be melted to form magma.
17. At what speed must an object be launched vertically upward for the
object to reach a maximum height of 16 meters above its starting position.
(Do not include units, do not include a sign, use 3 sig figs) *
===============================================
Explanation:
When starting at a height of 0, and initial velocity v, the equation of projectile motion is
y = -4.9x^2 + v*x
Where x is the time in seconds and y is the height at time x.
The vertex (h,k) of this parabola is the highest point. In general the vertex has its x coordinate at h = -b/(2a), so,
h = -b/(2a)
h = -v/(2*(-4.9))
h = v/(9.8)
Plug this into the first equation shown above. Also, plug in y = 16. Solve for v.
So we get the following.
y = -4.9x^2 + v*x
16 = -4.9(v/9.8)^2 + v*(v/9.8)
16 = (-5/98)v^2 + (5/49)v^2
16 = (-5/98)v^2 + (10/98)v^2
16 = (-5/98+10/98)v^2
16 = (5/98)v^2
(5/98)v^2 = 16
v^2 = 16*(98/5)
v^2 = 313.6
v = sqrt(313.6)
v = 17.708754896943
v = 17.7
The starting velocity must be roughly 17.7 meters per second.
A Penny is dropped and falls freely from the top of the Empire State building 443m high. What information do you know? 1b. How long does it take to hit the ground? 1c. How fast is it moving right before it hits the ground?
Answer:
1b. 9.51 s
1c. 93.18 m/s.
Explanation:
1a. From the question given above, the following data were obtained:
Initial velocity (u) = 0 m/s
Height (h) = 443 m
Acceleration due to gravity (g) = 9.8 m/s²
1b. Determination of the time it takes for the penny to get to the ground.
Height (h) = 443 m
Acceleration due to gravity (g) = 9.8 m/s²
Time (t) =?
h = ½gt²
443 = ½ × 9.8 × t²
443 = 4.9 × t²
Divide both side by 4.9
t² = 443/4.9
Take the square root of both side
t = √(443/4.9)
t = 9.51 s
1c. Determination of the speed of the penny before it hits the ground.
Initial velocity (u) = 0 m/s
Height (h) = 443 m
Acceleration due to gravity (g) = 9.8 m/s²
Final velocity (v) =.?
v² = u² + 2gh
v² = 0² + 2 × 9.8 × 443
v² = 0 + 8682.8
v² = 8682.8
Take the square root of both side
v = √8682.8
v = 93.18 m/s
Look at SS and answer
HELP ME PLEASE!!!
Explain impeachment in the process that Congress must follow during impeachment. Use details to support your answer.
Answer:
first a representative sponsor is a bill the bill is then assigned to a committee for study if released by the committee the bill is put on a calendar to be voted on debated or amended if the bill passes by simple
Planets that are farther from the Sun orbit more slowly.
True or false?
Answer:
True :))))))))))))))))))))))))))))))))
Develop a logical argument as to why television satellites, which broadcast information as electromagnetic radiation, can send signals from the vacuum of space?
The correct answer to this open question is the following.
Although you did not include options for this question, we can say the following.
Trying to be clear and concise, television satellites, which broadcast information as electromagnetic radiation, can send signals from the vacuum of space because electronic radiation can travel throughout space with no medium that transports it. Electronic radiation needs no material channel or medium to travel such as wires or cable.
That is how technology has developed wonders such as satellite communications for telephone, TV, or the internet. Information, data, sound, and images travel through transverse waves that easily move through the vacuum of space.
Electromagnetic radiations are defined as waves that do not require a medium for propagation. The EM waves have electric and magnetic vectors that do not require any medium to propagate.
The arguments can be explained as:
The Television antennae receive the signals in the form of electromagnetic waves.
The waves are transmitted from the satellites present in space. These waves are then transmitted to the TV station, where the information is then broadcasted. Other electronic devices such as cellular phones, computers, and FM radios have been developed using the propagation of the EM waves.
Thus, the EM waves do not require propagation due to which the signals can be easily transmitted from space.
To know more Electromagnetic Waves, refer to the following link:
https://brainly.com/question/8553652
what is the answer to this?
Answer:
c
Explanation:
What is the velocity of a jaguar that travels at 5.0 km in 2 hours 15 minutes? (use the ladder method of cancelling units)
Answer:
2.22 kilometers/hour
37.04 meters/minute
0.62 meters/second
Explanation:
Not sure which one you are looking for, so here you go. Hope this helps. :)
If the body temperature of a person is recorded as 37°C, what is the person’s body temperature in K? Round your answer to the nearest whole number. PLEASE HELP I REALLY NEED IT
Answer:
300 kelvin
Explanation:
Two workers are sliding 270 kg k g crate across the floor. One worker pushes forward on the crate with a force of 430 N N while the other pulls in the same direction with a force of 230 N N using a rope connected to the crate. Both forces are horizontal, and the crate slides with a constant speed. What is the crate's coefficient of kinetic friction on the floor?
Answer:
The value is [tex]\mu_ k = 0.249[/tex]
Explanation:
From the question we are told that
The mass of the crate is [tex]m = 270 \ kg[/tex]
The force applied by the first worker is [tex]F_1 = 430 \ N[/tex]
The force applied by the second worker is [tex]F_2 = 230 \ N[/tex]
Generally the kinetic frictional force between the crate and the floor is equal to the force applied by both worker , this is mathematically represented as
[tex]F_f = F_1 + F_2[/tex]
Here [tex]F_f[/tex] is the frictional force and this is mathematically represented as
[tex]F_f = \mu_ k * m * g[/tex]
So
[tex]\mu_ k * m * g = F_1 + F_2[/tex]
=> [tex]\mu_ k * 270 * 9.8 = 430 + 230[/tex]
=> [tex]\mu_ k = 0.249[/tex]
Water is unique in that it exists in all three states on Earth. Which statement best describes what happens to the energy of the particles when water vapor begins to cool?
A. The average potential energy decreases.
B. The average kinetic energy decreases.
C. The average potential energy remains the same.
D. The average kinetic energy remains the same.
Answer:
B - Average Kinetic Energy decreases
Explanation:
As the water vapor cools the molecules becomes less excited. Less excitement means less movement, hence less kinetic energy
An object that is launched from the top of the tower is dense enough that air resistance can be ignored. The object's initial velocity has components (vx = 30 m/s, vy = 20 m/s). What are the components of the object's velocity 3 seconds after launch?
Answer:
The components of the object's velocity 3 seconds after launch are
[tex]v_x = 30[/tex] m/s and [tex]v_y=-9.43[/tex] m/s.
Explanation:
The given components of initial velocity are
[tex]v_x= 30[/tex] m/s,
[tex]v_y= 20[/tex] m/s.
Assuming the y-axis is along the direction of gravitational force, so, the velocity along the x-axis will remain unchanged.
So, the x-componebt of the velocity after 3 seconds, [tex]v_x = 30[/tex] m/s.
Using the equation of motion along the y-direction, the final velocity, v, of a mass after time, t, having initial velocity, u is
v=u+at
In this case, [tex]u=y_y= 20 m/s, a=-9.81 m/s^2[/tex] ( as upward direction is taken as positive)
So, at time, t=3s, the final velocity in y-direction is
[tex]v= 20+(-9.81)\times 3[/tex]
[tex]\Rightarrow v=20-29.43[/tex]
[tex]\Rightarrow v= -9.43 m/s[/tex]
So, the y-component of the final velocity is 9.43 m/s in the downward direction.
Hence, the components of the object's velocity 3 seconds after launch are
[tex]v_x = 30 m/s[/tex] and [tex]v_y=-9.43 m/s[/tex].
The final vertical velocity of the object after 3 seconds is 49.4 m/s.
The final horizontal velocity of the object is 30 m/s.
The given parameters;
initial horizontal velocity, Vx = 30 m/sinitial vertical velocity, Vy = 20 m/stime of motion, t = 3 sThe final vertical velocity of the object after 3 seconds is calculated as follows;
[tex]v_f_y = v_0_y + gt\\\\v_f_y = 20 + 3(9.8)\\\\v_f_y = 49.4 \ m/s[/tex]
The final horizontal velocity of the object is the same as the initial horizontal velocity because horizontal motion is not affected by gravity.
[tex]v_f_x = v_0_x = 30 \ m/s[/tex]
Learn more here:https://brainly.com/question/13533552
Which of the following questions could best be answered by the work of warren Washington?
An object with a mass of 10kg accelerates 16 m/s2 when an unknown force is
applied to it. What is the amount of force?
160 N
9.8 m/s2
165.8 kg
1.6 N
Answer:
The answer is 160 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 10 × 16
We have the final answer as
160 NHope this helps you
You hit someone with a force of 187 N.
How much force is exerted on you?
Answer in units of N.
Answer: 187 N
Explanation: I got it right on quest
4. What is the correct formula for density?
D=m/w
M= V x D
D= m/v
D=m+v
Answer:
M=m/v dhdfhdyvgzrhtcgvygvvy
Answer:
D= m/v
Explanation:
The formula for density is D = M/V, where d is density, M is mass, and V is volume. Density is equal to Mass only when divided by the volume.
* Describe the motion of an
object in which its speed is
constant but the velocity is
changing.
Answer:
To summarize, an object moving in uniform circular motion is moving around the perimeter of the circle with a constant speed. While the speed of the object is...
Newton throws an apple straight up at 10 m/s. What is the ball's velocity
after 1.4 seconds?
Answer:
23.72m/s
Explanation:
The final velocity can be calculated using the formula:
V = u + at
Where; v = final velocity (m/s)
u = initial velocity (m/s)
a = acceleration due to gravity (m/s²)
t = time (s)
Based on the provided information, u = 10m/s, t = 1.4s, a = 9.8m/s²
V = 10 + (9.8 × 1.4)
V = 10 + 13.72
V = 23.72m/s
8. What is one key physical difference between
transition metals and poor metals?
a. Atomic mass
b. Hardness
c. Reactivity
d. Charge
15% input work is lost due to the friction then what is the efficiency of machine.??
Help I don’t get it
If you help you get brainliest and 50 points
It’s science
Answer: i cant help u with that its a grade above me
Explanation:
quick someone answer this i will name you brainliest and thanks pleaseeee HELPP
This 90 kg anvil is about to fall from a 0.9 m high bench. What is its PE?
Use g = 9.8 m/s2 for the acceleration due to gravity.
Answer:
Option D. 793.8 J
Explanation:
From the question given above, the following data were obtained:
Mass (m) of object = 90 Kg
Height (h) = 0.9 m
Acceleration due to gravity (g) = 9.8 m/s²
Potential energy (PE) =...?
Potential energy is simply defined as the energy possessed by an object by reason of its position. Mathematically, it can be expressed as:
PE = mgh
Where:
'PE' is the potential energy.
'm' is the mass of object.
'g' is the acceleration due to gravity.
'h' is the height to which the object is located.
With the above formula, we can obtain the potential energy, PE as follow:
Mass (m) of object = 90 Kg
Height (h) = 0.9 m
Acceleration due to gravity (g) = 9.8 m/s²
Potential energy (PE) =...?
PE = mgh
PE = 90 × 9.8 × 0.9
PE = 793.8 J
Therefore, the potential energy of the object is 793.8 J
What is the dependent and independent variable of Speed and Distance to brake??
Answer:
For the braking distance function, the speed of the car is the independent variable and is measured along the horizontal axis. The braking distance is the dependent variable and is measured along the vertical axis.
Why do many scientists work in groups?
a.
To generate new ideas
c.
Because it is too expensive to work on their own
b.
To make sure that the work is accurate
d.
So there is always someone in lab to monitor experiments
Answer:
I well say to make sure that the work is accurate
Explanation:
I hope this is right