Answer:
The force that the book exerts down on the table is equal to the force the table exerts upward.
Explanation:
I am 100% positive. That results in balanced forces which is why it does not move. If you did want it to move, you would apply unbalanced forces.
Answer:
4th: "The force that the book exerts down on the table is equal to the force the table exerts upward"
Explanation:
Basically, a book on a table is balanced in terms of forces. Gravity is opposed by the table and there are no forces acting to move the book in any direction. If there was a breeze that was not strong enough to move the book, it is because the force of friction is equal to that provided by the breeze.
The density of gold is 19.3gm/ml . Express it's value in SI
Explanation:
Troy ounce 1 32.15075
Gram 31.1034768 1000
Kilogram 0.03110348 1
Tola (South Asia) 2.6666675 85.73535
Which energy source was developed through the invention of the atomic bomb?
Answer:
Nuclear energy
Explanation:
I don't want the answer i just need help on figuring out how to solve this!
Jose Altuve hits a fastball with a velocity of 49.1 m/s (109.9 mph) at an angle of 22º. If left field is 96 m (315 ft) away, will this be a home run?
Answer:
Yes, it will be a Home Run
Explanation:
(Note : It is assumed that the collision between bat and ball is perfectly elastic.)
( Also I don't know anything about baseball, so I checked the dimensions online, which are minimum 325 ft (left and right field foul pole) and minimum 400 ft centre field fence)).
STEP 1
Find Horizontal Range of Projectile
[tex]R = \frac{ {u}^{2} \sin(2 \alpha ) }{g} = \frac{(49.1)^{2} \sin(44°) }{g}[/tex]
[tex]R = 170.8 \: m \: = 560.3 \: ft[/tex]
Therefore, the ball will travel 560.3 ft horizontally well beyond 400 ft (largest dimension of the field), and it'll be a Home Run.
A rescue pilot wishes to drop a package of emergency supplies so that it lands as close as possible to a target. If the plane travels with a velocity of 18 m/s and is flying 225 m above the target, how far away (horizontally) from the target must the rescue pilot drop the package?
Answer:
x = 121.86 m
Explanation:
It is given that,
The vertical velocity of a plane, [tex]v_x=18\ m/s[/tex]
It is flying above the target, h = 225 m
First we will find the time taken by the plane to reach the ground. It can be calculated using the second equation of motion as follow :
[tex]h=ut+\dfrac{1}{2}at^2[/tex]
Here, u = 0 and a = g
[tex]h=\dfrac{1}{2}gt^2\\\\t=\sqrt{\dfrac{2h}{g}} \\\\t=\sqrt{\dfrac{2\times 225}{9.81}} \\\\t=6.77\ s[/tex]
Let x is the horizontal distance from the target. It can be calculated as follows :
[tex]x=v_xt\\\\x=18\times 6.77\\\\x=121.86\ m[/tex]
So, the rescue pilot drop the package at a distance of 121.86 m from the target.
A red rubber ball rolls down a hill from rest with an acceleration of 7.8 m/s 2 . How fast is it moving after it has traveled 5 m?
Answer:
8.83m
Explanation:
Given parameters:
Acceleration = 7.8m/s²
Initial velocity = 0m/s
distance covered = 5m
Unknown:
Final velocity = ?
Solution:
The equation to solve this problem with is given as;
V² = U² + 2aS
V is the final velocity
U is the initial velocity
a is the acceleration
S is the distance
Input the parameters and solve;
V² = 0² + 2 x 7.8 x 5 = 78
V = √78 = 8.83m
When a car's velocity is positive and its acceleration is negative, what is happening to the car's motion?
-the car slows down
-The car speeds up.
-The car travels at constant speed.
-The car remains at rest.
Answer:
Assuming rightward is positive, the velocity is positive whenever the car is moving to the right, and the velocity is negative whenever the car is moving to the left. The acceleration points in the same direction as the velocity if the car is speeding up, and in the opposite direction if the car is slowing down.
Explanation:
Complete the statement below with all that apply.
Acceleration is
A. the slope of a velocity vs. time graph
Pector
B. a Vector
C. measured in m/s
D. the change in displacement divided by the change in time
Answer:
Acceleration is a vector, is measured in m/s, and A.
Explanation: SO BASICALLY, the answer to this question is A, B, and C. The last one would not fit the description of acceleration because it is describing Velocity.
Tech A says that some electric actuators are positioned by an A/C ECU which checks the air flow with sensors. Tech B says that electric actuators are positioned by an A/C ECU and some actuators have a potentiometer to tell the A/C ECU the position of the door. Who is correct?
Answer:
Tech B
Explanation:
The control of electric actuators may be through through a two-wire or a five-wire circuit through the driver circuit by bidirectionally controlling via the motor wire polarity. The door position is determined by counting the actuator commutator pulses by the control module in the actuator with 2-wire, while the actuator with 5-wire uses potentiometer feedback.
The A/C ECU is the Air Condition Engine Control Unit.
PLZ HELP DUE IN 5MINUTES
Answer:
Nitrogen is de solvent while others are the solute
The temperature of a 5.0 kg block increases by 3 degrees C when 2,000 J of thermal energy are added to the block. What is the specific heat of the block? _____________
Answer:
133.33J/kg°C
Explanation:
Given parameters:
Mass = 5kg
Temperature change = 3°C
Thermal energy = 2000J
Unknown:
Specific heat of the block = ?
Solution:
To find the specific heat capacity, use the formula below;
H = mCФ
where H is amount of heat
m is the mass
C is the specific heat capacity
Ф is the temperature change
Input the parameters and solve;
2000 = 5 x C x 3
C = [tex]\frac{2000}{15}[/tex]
C = 133.33J/kg°C
What must an object have in order to exert a gravitational field?
Answer:
power
Explanation:
Pete the Penguin loves to sled down his favorite hill. If he hits a speed of
50 m/s after 5 seconds, what is his rate of acceleration? Hint: He starts at
O m/s at the top of the hill.
Answer:
10 m/per second
Explanation:
he speeds up 10 m in a single second
Define weight
Please help!!Thanks!!
Answer:
in science and engineering , the weight of an object is the force acting on the object due to gravity.
Which of the three objects is the largest? Explain your answer.
Answer:
isn't it the first one
Answer:
The object in figure C is a planet, so it is the largest object. Planets are larger than comets and asteroids.
Explanation:
find the mass of a football player who's momentum is 630 kg•m/s backward and. is traveling at 7 m/s.
Answer:
The answer is 90 kgExplanation:
In order to find the mass of the football we use the formula
[tex]m = \frac{p}{v} \\ [/tex]
where
p is the momentum
v is the velocity
We have
[tex]m = \frac{630}{7} \\ [/tex]
We have the final answer as
90 kgHope this helps you
A football player sprints down the field for a touchdown traveling a total of
40 meters in 5 seconds. What was the football player's speed?
Answer:
Explanation:
It's a good thing to claim this was speed and not velocity.
Givens
d = 40 meters
t = 5 seconds
V = ??
Formula
v = d/t
Solution
v = 40 m/5 sec
v = 8 m/s
If you really wanted to get picky, you should convert the distance to yards which is how distance is measured in football
1.09 yards = 1 meter
d = 40 * 1.09 = 43.74 yards.
t = 5 seconds
v = 43.74/5 = 8.749 yards / second.
A vehicle with a mass of 1250 kg travels at a speed of 113 km/h. What is the vehicle’s momentum?
Answer:
50 mph
Explanation:
From Earth stars appear very dim, but in space they are quite bright. From Earth we are seeing the stars
A) absolute magnitude
B) apparent magnitude
C) available magnitude
D) absent magnitude
Answer:
B
Explanation:
What is the oldest animal on earth?
Answer:
well on earth living are turtuls but just longest ied say dinos
Explanation:
Given 1 inch ≡ 2.54 cm and 1 foot ≡
12 inches, how many square centimeters are
in 3.22 ft2
?
Answer:
2991.47 [cm^2]
Explanation:
To solve this problem we must perform a dimensional analysis and use the corresponding conversion values:
[tex]3.22[ft^{2}]*\frac{12^{2}in^{2} }{1^{2}ft^{2}} *\frac{2.54^{2}cm^{2} }{1^{2}in^{2} } \\2991.47[cm^{2}][/tex]
A projectile is launched with an initial velocity of v⃗ =(4m/s)x^+(3m/s)y^. What is the velocity of the projectile when it reaches its highest point?
Answer:
4m/sExplanation
Give the initial velocity of am object as v =(4m/s)xi+(3m/s)yj
From the expression;
Vy = 3m/s
Vx = 4m/s
At the maximum height, the velocity of the body is zero i.e Vy = 0m/s
The velocity of the projectile as it reaches its highest point will be:
v = (4m/s)xi + 0
v = √4²+0²
v = √16
v = 4m/s
Hence he velocity of the projectile when it reaches its highest point is 4m/s
A jet airliner moving initially at 693 mph (with respect to the ground) to the east moves into a region where the wind is blowing at 798 mph in a direction 37◦ north of east. What is the new speed of the aircraft with respect to the ground? Answer in units of mph.
Answer:
The new speed of the aircraft with respect to the ground is 1414.3 mph.
Explanation:
Given that,
Angle = 37°
Velocity of jet airliner = 693 mph
Velocity of wind = 798 mph
We know that,
The new velocity of the aircraft with respect to the ground
[tex]v=v_{a}+v_{w}[/tex]
We need to calculate the new speed of the aircraft with respect to the ground
Using formula for velocity
[tex]v=\sqrt{(v_{a})^2+(v_{w})^2+2v_{a}v_{w}\cos\theta}[/tex]
Put the value into the formula
[tex]v=\sqrt{(693)^2+(798)^2+2\times693\times798\cos37}[/tex]
[tex]v=1414.3\ mph[/tex]
Hence, The new speed of the aircraft with respect to the ground is 1414.3 mph.
10. How do you use a triple-beam balance? Fill in the blanks.
1st – Place the film canister on the ________________.
2nd – Slide the large ________________ to the right until the arm drops below the line and then move it back one notch.
3rd – Repeat this process with the _________ weight. When the arm moves below the line, back it up one groove.
4th – Slide the ______________ weight on the front beam until the _____________ match up.
5th – Add the amounts on each beam to find the total __________ to the nearest tenth of a gram.
Answer:
1st – Place the film canister on the scale.
2nd – Slide the large weight to the right until the arm drops below the line and then move it back one notch.
3rd – Repeat this process with the top weight. When the arm moves below the line, back it up one groove.
4th – Slide the small weight on the front beam until the lines match up.
5th – Add the amounts on each beam to find the total mass to the nearest tenth of a gram.
Explanation:
The triple beam balance is an instrument that is used in measuring the mass of substances to a very high degree of precision. The reading error is given by ±0.05 grams. The triple beam balance as the name implies has three beams that measure substances of different mass levels.
The beams are categorized as small, medium, and large. There is a balance on which the substance to be weighed is placed directly upon. To use this measuring device, the procedures mentioned above are followed.
Calculate the momentum of the skater with a mass of 45kg and a velocity of 3 m/s.
Answer:
90 kgm/s
Explanation:
Which mathematical statement shows the relationship between gravity and mass?
Answer
F (force of gravity) = M (mass of an object) × G (acceleration due to gravity)
Step-by-step explanation:
Force of gravity (F) = Mass (M) × Gravitational acceleration (G)
The weight of an abject is equal to its gravitational force!
Explanation:
Answer:
[tex]F_{g} = \frac{m}{d^{2} }[/tex] shows the relationship between gravity and mass.
Explanation:
According to the Newton's law of gravitation, the gravitational force between two bodies is,
[tex]F_{g} = G.\frac{m_{1}.m_{2} }{d^{2} }[/tex]
here [tex]m_{1} and m_{2}[/tex] are masses, d is distance between them.
What is Newton's law of Gravitation ?It states that gravitational force acting two bodies is directly proportional to the product of masses and inversely proportional to the square of the distance between them.
In above formula ,
If [tex]m_{1} = 1 and[/tex] [tex]m_{2} = m[/tex]
so [tex]F_{g} = G \frac{m}{d^{2} }[/tex]
Since G is constant ,
[tex]F_{g}[/tex] ∝[tex]\frac{m}{d^{2} }[/tex]
Hence second option is correctly showing relationship between gravity and mass.
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how many bags of pineapples did joey buy if he bought 8 pineapples. each bag holds three pineapples.
Answer:
3 BagsExplanation:
1) Since the bags hold three pineapples
2) we can also hold two pineapples in one bag.
Hope this helps! <3
how does the initial velocity affect the final velocity
Answer:
Initial velocity is independent of the slope of the graph; that is, the acceleration. An object thrown downward still accelerates after release at the same rate as an object that is dropped.
A wooden box is pushed with 100 N towards North
direction, and from the opposite side another 100 N is
applied towards South direction. What is the net force?
9. A coin rolls off the edge of a table that is 89 meters above the floor and lands 2.88 meters from the bottom o
the table
A. How much time is the coin in the air?
Answer:
0.43 seconds
Explanation:
The bowler threw the 9kg bowling ball with a force
of 90N. What was the bowling ball's acceleration?
Answer:
10 m/s²
Explanation:
9kg= mass 90N=force acceleration=?
the equation is;
Acceleration (m/s²)= force(N) ÷ mass(kg)