Answer:
The net force is 20N in the direction of the 80N force.
Explanation:
The net force is the resultant force acting on a body. This force is that singular force that will have the same magnitude and effect as the network of forces on a body.
In this problem:
Force 1 = 80N
Force 2 = 60N
Net force = Force 1 - Force 2
Net force = 80N - 60N
Net force = 20N
The net force is 20N in the direction of the 80N force.
What is an earthquake
Answer:
When a underground suddenly breaks along a fault it cause vibration it is called earthquake.
A cannon with a muzzle velocity of 500. meters per second fires a cannonball at an angle of 30.° above the horizontal. What is the vertical component of the cannonball's velocity as it leaves the cannon?
0.0 m/s
250. m/s
433 m/s
500. m/s
Complete question
A cannon with a muzzle velocity of 500. meters per second fires a cannonball at an angle of 30.° above the horizontal. What is the vertical component of the cannonball's velocity as it leaves the cannon?
A 0.0 m/s
B 250. m/s
C 433 m/s
D 500. m/s
Answer:
The correct option is C
Explanation:
From the question we are told that
The velocity is [tex]v = 500 \ m/s[/tex]
The angle is [tex]\theta = 30^o[/tex]
Generally the vertical component of the canon ball is mathematically represented as
[tex]v_y = v * cos (30 )[/tex]
=> [tex]v_y = 500 * cos (30 )[/tex]
=> [tex]v_y = 433 \ m/s[/tex]
Answer:
250. m/s
Explanation:
It is vertical component so you do: 500mSin(30°) = 250m/s
Even though you are getting closer to the sun as you ascend into the troposphere, why does the temperature drop? the lower atmosphere is heated by the ground warm air stays below cold air the troposphere is a stable layer ozone blocks the sunlight
The Sun light is reflected back by earth. On process of reflecting back the sunlight, the lower layer of troposphere absorbs the most sunlight and upper layer absorbs the least sunlight. So when We ascend to troposphere, we move towards the upper layer of troposphere where sunlight is least absorbed and is colder than lower layer where sunlight is most absorbed
In the troposphere, the temperature generally decreases with altitude. The reason is that the troposphere's gases absorb very little of the incoming solar radiation. Instead, the ground absorbs this radiation and then heats the tropospheric air by conduction and convection.
How can temperature influence the rate chemical reaction between an acid and a base that will make our rocket defy gravity and launch upward?
Answer:
Explanation:
Generally, an increase in temperature increases the rate of a chemical reaction. Consequently, when the temperature of a reaction is raised, the molecules present in the reaction interact faster by colliding with one another and surpassing the effective collision of such reaction to bring about a high reaction rate. Similarly, in the case of the rocket launch, the same process occurs as the temperature increase will cause an increase in the reaction rate leading the hydrogen from the acid to react explosively with the oxygen from the base to form water - this makes the rocket defy gravity and launch upward.
If a tennis ball has a velocity of 18 m/s and a momentum of 1.06 kg • m/s, what is the mass of the tennis ball in grams? Round the answer to two significant figures.
Answer:
58 g
Explanation:
Momentum = mass* velocity
P=mv
P= 1.06 kg*m/s
M=?
V=18 m/s
1.06 kg*m/s=m(18m/s)
M=0.058 kg
0.058kg = 58 g
Answer:
59
Explanation:
edge 2021
What are machines fueled by?
Group of answer choices
A. Gasoline only
B. Electricity only
C. Sun
D. Energy
A force of 85 N is used to push a box along the floor a distance of 15 m. How much work was done?
Answer:
1275J
Explanation:
Given parameters:
Force on box = 85N
Distance moved = 15m
Unknown:
Work done = ?
Solution:
Work done is the amount of force applied on a body to move it through a specific distance.
Work done = Force x distance
Now insert the parameters and solve;
Work done = 85 x 15 = 1275J
How are scientists able to predict when and where the next eclipse will occur?
Answer:
When the Earth and sun are perfectly lined up, then it will happen. They can tell when it's going to happen.
Explanation:
This is why it only happens in some places. Some days it's not sunny out, so it's not going to happen.
what happens to the particles in a substance during a physical change?
Answer:
In physical changes no new materials are formed and the particles do not change apart from gaining or losing energy. ... Particles stay the same unless there is a chemical change whether the matter is solid, liquid or gas. Only their arrangement, energy and movement changes.
Explanation:
this is true because if you think about it if you put a pill in a glass of water it dissolves its like particles
Canyon walls are eroded at a rate of approximately:
Group of answer choices
A half a centimeter per day.
B half a centimeter per year.
C one centimeter per day.
D one centimeter per year.
What is the acceleration of the box?
Answer:
a=4,32m/s^2
Explanation:
Fnet = F1 - F2
= 12-1.2
= 10.8N
m=2.5kg
Fnet =ma
10.8=2.5a then divide both sides by 2.5 to get acceleration
What is the modern periodic table of elements?
A. A chart organizing all elements by their atomic mass
B. A list of all elements occuring in nature
C. A chart organizing all elements by their atomic number
D. A list of all elements created by humans
among 1 litre boiling water and red hot glowing nail which one has more amount of heat and why
Answer: The Water
Explanation:
The boiling litre of water has more volume and so has more heated molecules per cubic metre so it will have a higher amount of heat than the glowing nail.
To practically test this, put the glowing nail into a litre of cold water and record the final temperature when the nail has cooled down. Repeat this with the boiling litre of water. You will notice a higher final temperature with the boiling water indicating that it had more heat.
How many seconds are there in a calendar year,given that a calendar year has 365.24 days in it?
Answer:
31556736
Explanation:
Since there are 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day, and 365.24 days in a year, then you multiply all of those.
60*60*24*365.24 =
31556736
A sled is pulled at a constant velocity across a horizontal snow surface. If a force of 100 N is being applied to the sled rope parallel to the ground, what is the force of friction between the sled and the snow?
Answer:
60.18 N
Explanation:
Given that:
The force applied on the sled = 100 N
Suppose, the angle between the sled rope and the ground = 53°
The horizontal force which acts in the horizontal direction can be expressed as:
[tex]F_x = F \ cos \theta[/tex]
[tex]F_x = 100 \ cos (53)[/tex]
[tex]F_x = 60.18 \ N[/tex]
But if the angle between the sled rope is parallel to the ground. Then, we use an angle on a straight line which is = 180°
[tex]F_x = F \ cos \theta[/tex]
[tex]F_x = 100 \ cos (180)[/tex]
= 100 × -1
= -100 N
An object with a mass of 7kg gains the speed 26 meters per second after traveling the distance 2.8m. Calculate the resulting force that acts on it.
Answer:
F = 845 [N]
Explanation:
To solve this problem we must use the following equation of kinematics.
[tex]v_{f} ^{2} =v_{o} ^{2} +2*a*x[/tex]
where:
Vf = final velocity = 26 [m/s]
Vo = initial velocity = 0
a = acceleration [m/s²]
x = distance = 2.8[m]
[tex]26^{2} = 0 +(2*a*2.8) \\5.6*a = 676\\a = 120.71[m/s^{2}][/tex]
Now we have to use Newton's second law which tells us that force is equal to the product of mass by acceleration.
ΣF = m*a
where:
F = force [N]
m = mass = 7 [kg]
a = acceleration = 120.71 [m/s²]
[tex]F = 7*120.71\\F = 845 [N][/tex]
why people bleed from nose while climbing uphill rapidly
Answer:
because the presure it puts on your body same as if you go to deep in the water
A football player with a mass of 100 kg from runs from rest towards his opponent and hits him with a force of 500 Newtons 5 seconds later. What was his momentum before impact?
Answer:
2500kgm/s
Explanation:
Change in momentum is equal to impulse, numerically.
Ft=m( v-u)
But he begins from rest so u= 0
Then
Ft= mv
500(5)=mv
2500= mv
An object with mass 30 kg travelling as speed of 11 m/s receives an impulse of
240 kg m/s. What is the final velocity of the object?
Answer:
V₂ = 19 [m/s]
Explanation:
The final linear momentum will be equal to the sum of the initial momentum plus the momentum received. By means of the following equation, we can determine the final momentum.
[tex]m_{1}*v_{1} + IMP_{1-2} = m_{2}*v_{2}[/tex]
where:
m₁ = m₂ = mass = 30 [kg]
v₁ = velocity = 11 [m/s]
IMP₁-₂ = 240 [kg*m/s]
v₂ = final velocity [m/s]
[tex](30*11) + 240 = 30*V_{2}\\330 + 240 = 30*V_{2}\\v_{2}=19 [m/s][/tex]
The final velocity of the object is 19 m/s
The impulse is given by:
Impulse = m(v - u)
where m is the mass, v is the final velocity and u is the initial velocity.
Given that impulse = 240 kgm/s, u = 11 m/s, m = 30 kg. Hence:
Impulse = m(v - u)
240 = 30(v - 11)
8 = v - 11
v = 19 m/s
The final velocity of the object is 19 m/s
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The diagram shows currents that form as water is heated. A full pot sits on a stove. 2 pairs of curved arrows are inside the pot, Each has a blue arrow curving downward from the top of pot and a red arrow curving up from the bottom of the pot. Which would most likely contain this same type of current? the air above a wildfire a carton of milk in a refrigerator a snowdrift on a shady mountainside a boulder in a hot desert
Answer:
air above a wild fire
Explanation:
the type of current formed in the pot is referred to as a convectional current which forms when the heated fluid rises making the cool fluid descend the same happens with the air above a wildfire a convectional current will form when the warm air rises and the cool air descends.the main reason for tge descending and ascending is that the air or liquid closest to the source of heat will get heated making it lighter but the air or liquid tgat was further from the source of heat will not be as light so as the warm fluid rises, the cool fluid descends.
Answer:
air above a wildfire
Explanation
please help .-. its for physics
Answer:
your answer is correct
A car accelerates from rest at a rate of 3 m/s² for 4 seconds. How far did the car travel?
PLEASE help fasttt
Answer:
24m
Explanation:
Given parameters:
Initial velocity = 0m/s
Acceleration = 3m/s²
Time = 4s
Unknown:
Distance covered = ?
Solution:
To solve this problem, we apply the right motion equation:
S = ut + [tex]\frac{1}{2}[/tex]at²
S is the distance
u is the initial velocity
t is the time taken
a is the acceleration;
S = (0 x 4) + [tex]\frac{1}{2}[/tex] x 3 x 4²
S = 24m
in humans what makes the sound vibration vibrate
Answer:
sound vibration of spicker
why does deceleration lower force during a collision?
A train travelling at 20 m/s has 2 000 000 J of kinetic energy. What is the mass of
the train?
Answer:
10,000 kgExplanation:
The mass of the train can be found by using the formula
[tex]m = \frac{2k}{ {v}^{2} } \\ [/tex]
k is the kinetic energy
v is the velocity
From the question we have
[tex]m \frac{2(2000000)}{ {20}^{2} } = \frac{4000000}{400} = \frac{40000}{4} \\ [/tex]
We have the final answer as
10,000 kgHope this helps you
Answer:
10,000 kg
Explanation:
.
11. A ball rolls across a table of height 1.2 meters, leaves the table with a speed of ve, and lands 0.69m
from the edge of the table.
vo
1.2 m
-0.69 m
a. Find the time it takes the ball to fall from the edge of the table and reach position A in the picture
above.
Answer:
sorry don't know i just need points
Explanation:
HELP ASP PLSSSSSS ASP
Answer:
heart rate increases during activity
Explanation:
You can work at 70 to 85 percent of your maximum heart rate during vigorous activity.
2. For every action there is an equal and opposite reaction. Which Newton's law is defined?
Answer:
newtons 3rd law
Explanation:
newtons thirs law states for every action there is an equal and opposite reaction.
Answer:
Newton Third law states that for every action there is an equal and opposite reaction
find the amount and the compound interest on rupees 10000 for 2 years at 5% per annum compounded annually
Compound interest:
[tex]a = p( 1 + \frac{r}{n} ) { }^{nt} [/tex]
a = final amount
p = principal amount
r = rate of interest
t = time
n = no. of compounding periods per year
p = 10000
r = 5% = 5/100 = 0.05
t = 2
n = 1
[tex]a = 10000(1 + \frac{0.05}{1} ) {}^{2 \times 1} [/tex]
[tex]a = 10000(1 + 0.05) {}^{2} [/tex]
[tex]a = 10000(1.05) {}^{2} [/tex]
[tex]a = 10000(1.1025)[/tex]
[tex]a = 11025[/tex]
If the force is applied to a car, then its acceleration will ___________ because of Newton's _____________.