Answer:
Explanation:
given
initial velocity u = 4.45m/s
Height = 0.6m
g = 9.8m/s²
Required
final velocity v
Using the equation of motion;
v² = u²-2gH (upward motion of the fish makes g to be negative)
v² = 4.45²-2(9.8)(0.6)
v² = 19.8025-11.76
v² = 8.0425
v = 2.84 m/s
Hence the speed of the fish as it passes a point 0.6 m above the water is 2.84m/s
To get the time, we will use the formula
v = u - gt
2.84 = 4.45 - 9.8t
2.84-4.45 = -9.8t
-1.61 = -9.8t
t = 1.61/9.8
t = 0.164secs
Hence the time taken is 0.164secs
An object is thrown straight down with an initial speed of 4 m/s from a window which is 8 m above the ground. Calculate: a) The time it takes the object to reach the ground b) Its velocity when it reaches the ground.
Answer:
0.41s
8.01m/s
Explanation:
Using the formula; v = u + at
Where;
u = initial velocity (m/s)
v = final velocity (m/s)
t = time (s)
a = acceleration (m/s²)
According to the provided information, u = 4m/s, s = 8m,
V = u + at
4 = 0 + 9.8t
4 = 9.8t
t = 0.41s
b) v = u + at
v = 4 + 9.8(0.41)
v = 4 + 4.018
v = 8.018m/s
derivation of traingle law of vector adddition
Answer:
Triangle law of vector addition is one of the vector addition laws. Vector addition is defined as the geometrical sum of two or more vectors as they do not follow regular laws of algebra. The resultant vector is known as the composition of a vector
Explanation:
if it helps great if that still doesn't help thats the best i can do
When I mix 200g of water at 10°C with 300g of water at 55°C, what is the final temperature of the mixture?
Answer:
4th of August is the
Explanation:
5th and then I can help out by getting
ervation of Mass Review Add-ons Help Last edit was 31 minutes ago Arial 11 + B I U A EE 1 12 3 4 4) In a closed system, a chemical reaction takes place. The mass of the reactants in the beginning of the reaction is 32g. What does the mass have to be in the end of the reaction in order to follow the law of conservation of mass?
Answer:
It has to be 32g
Explanation:
Mass at the beginning of the reaction is 32g
To ensure the law of conservation of mass, the mass at the beginning and end of the reaction must be the same.
The law of conservation of mass states that "matter is neither created nor destroyed but atoms combines with one another" .
So, if a reaction starts with 32g it must end with 32gA white dwarf star has a density of about 1.0 x 10^9 kg/m3. If the earth were to suddenly become as dense as a white dwarf star, what would its radius be?
Answer:
R = 98304.75 m = 98.3 km
Explanation:
The density of an object is given as the ratio between the mass of that object and the volume occupied by that object.
Density = Mass/Volume
Now, it is given that the density of Earth has become:
Density = 1 x 10⁹ kg/m³
Mass = Mass of Earth (Constant) = 5.97 x 10²⁴ kg
Volume = 4/3πR³ (Volume of Sphere)
R = Radius of Earth = ?
Therefore,
1 x 10⁹ kg/m³ = (5.97 x 10²⁴ kg)/[4/3πR³]
4/3πR³ = (5.97 x 10²⁴ kg)/(1 x 10⁹ kg/m³)
R³ = (3/4)(5.97 x 10¹⁵ m³)/π
R = ∛[0.95 x 10¹⁵ m³]
R = 98304.75 m = 98.3 km
About how much greater is the gravitational force exerted by the moon on the near side of the earth than on the far side? Choose one of the Following:
(a) About 2% greater
(b) About 7% greater
(c) About 11% greater
(d) About 15% greater
Solution :
Distance between the Earth and the moon, D = [tex]$3.84 \times 10^8 \ m$[/tex]
Radius of the earth, r = [tex]$6.37 \times 10^6 \ m$[/tex]
Gravitational force on the near side of the moon, [tex]$F_N = \frac{GM_m m}{(D-r)^2}$[/tex] ......(1)
Gravitational force on the far side of the moon, [tex]$F_F = \frac{GM_m m}{(D+r)^2}$[/tex] ..............(2)
where, [tex]$M_m$[/tex] = mass of moon
m = mass of the near side and far side respectively (both are taken as equal)
Therefore,
[tex]$\frac{F_N-F_F}{F_N}\times 100 = \frac{\frac{GM_m m}{D-r}^2-\frac{GM_m m}{D+r}^2}{\frac{GM_m m}{D-r}^2} \times 100 $[/tex]
[tex]$=1 - \frac{(D-r)^2}{(D+r)^2} \times 100$[/tex]
[tex]$=1- \left(\frac{1-\frac{r}{D}}{1+\frac{r}{D}}\right)^2 \times 100$[/tex]
[tex]$= 1- \left(\frac{0.98}{1.02}\right)^2 \times 100$[/tex]
= 7%
Hence, correct option is (b) About 7% greater
The mass of a material is a/an ___________.
Answer:
Extensive property
Explanation:
Answer:
Extensive property
Explanation:
Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.
I need guidance pls
In a few sentences, describe why abstinence is the best choice to prevent the consequences of sexual activity. (health)
Answer:
Abstinence is the best choice to prevent the consequences of sexual activity because you're putting yourself at lower risk to encounter STD's and STI's. Abstinence also prevents you from getting pregnant.
Explanation:
I got 100% on Edge.
Complete abstinence is the best choice to prevent the consequences of sexual activity because this prevents any type of sexual contact and STDs.
What is Abstinence?Abstinence is a self-enforced restraint from the indulging in bodily activities which are widely experienced as giving pleasure to people. Most frequently, abstinence refers to sexual abstinence, however it can also mean abstinence from alcohol, drugs, food, etc.
Complete abstinence is the only way which can guarantee protection against the infection with sexually transmitted diseases. This means avoiding all the types of intimate genital contact. Someone who is practicing complete abstinence does not have any type of intimate sexual contact. So, there is no risk of getting an STD.
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In a jigsaw classroom: A. students choose their own groups. B. students have to depend on one another to learn the required information. C. students learn the material on their own. D. students change groups every day
Answer:
B. students have to depend on one another to learn the required information.
Explanation:
It's kinda like puzzles having pieces and you use them to put together. So they can use this information to figure out what they're trying to solve with the information. -I hope this helped!
At time t = 0.00 s, a car is traveling along a straight line at a speed of 10 m/s with constant acceleration. The car travels 46.0 m during the time interval between t = 2.00 s and t = 4.00 s. What is the acceleration of the car?At time t = 0.00 s, a car is traveling along a straight line at a speed of 10 m/s with constant acceleration. The car travels 46.0 m during the time interval between t = 2.00 s and t = 4.00 s. What is the acceleration of the car?
Answer:
0.00
Explanation:
How high will a cannonball reach if fired straight up out of a cannon at an initial upward velocity of
120m/s?
Answer:
720 m
Explanation:
Taking the upward direction as positive
We are given:
Initial vertical velocity of the cannonball = 120 m/s
Vertical acceleration of the cannonball = -10 m/s²
Final velocity of the Cannonball = 0 m/s [at the maximum height, the velocity of the ball will be 0 m/s for a moment]
Maximum height of the ball:
v² - u² = 2as [Third equation of motion]
replacing the variables (s is the maximum height)
(0)² - (120)² = 2(-10)(s)
-14400 = -20s
s = -14400 / -20 [Dividing both sides by -20]
s = 720 m
Hence, the maximum height of the Cannonball fired vertically at a velocity of 120 m/s is 720 m
how many significant figures does 1700000000 have ?
Answer:
2 sig
Explanation:
1 and 7
A 1000kg car is moving with a speed of 20m/s. Determine the net work required to move the
vehicle to a speed of 30m/s?
Answer:
250,000 Joules
Explanation:
The work required is the amount of energy added, so the answer is the difference in kinetic energy before and after the acceleration of the car. (The problem doesn't say it's flat where the car is, but well assume it since there is no information about an elevation change that would require us to concern ourselves with potential energy!)
W = E_final - E_initial
= 1/2 m v_final^2 - 1/2 m v_initial^2
= 1/2 m (v_final^2 - v_initial^2)
= 1/2 (1000 kg) ( (30 m/s)^2 - (20 m/s^2) )
= 1/2 (1000 kg) (500 m^2/s^2)
= 250,000 kg m^2/s^2
= 250,000 Joules
What were the two classifications of motion according to Aristotle?
Answer:
natural motion and violent motion
Explanation:
1. Find the period of a tuning fork that vibrates 120 times/sec.?? I will give brainlest
Answer:
it the last one
Explanation:
How might you determine experimentally the moment of inertia of an irregularly shaped body about a given axis?
Answer:
Using the parallel axis theorem
Explanation:
We note the angular speed and also the systems energy. Using these information we calculate the moment of inertia of irregular shaped body.
Io = 2E/w²
When we have moment of inertia of irregular shaped body, we can then use parallel axis theorem to solve for the moment of inertia of the body about the given axis.
I = Io + md²
PLZZ ANSWER THE QUESTION
Answer:
D. ? Its the only one talking about color
Finish the sentence below.
Jack just met up with the bois to. . .
Answer:
cook some hamburgers and go fishing
Explanation:
Answer:
go to the baseball game and have fun
Explanation:
Question 4 of 10
How does the electric current of an AC generator differ from that of a DC
generator?
O A. It is much stronger.
OB. It flows through the permanent magnets.
C. It is much weaker.
D. It constantly reverses direction.
Answer:
D) it constantly reverses direction
Explanation:
Just took the test
Why do you think the objects in each collision experience a different change in velocity?
Answer:
In a collision, there is a collision force which endures for some amount of time to cause an impulse. This impulse acts upon the object to change its velocity and thus its momentum
A ball of clay is moving at a speed of 12 m/s collides and sticks to a stationary ball of clay. If each ball has a mass of 13 kg, what's the combined velocity of the two balls of clay after the collision
Answer:
p_{f} = 6 m / s
Explanation:
We can solve this exercise using conservation of momentum. For this we define a system formed by the two balls, so that the forces during the collision have been intense and the moment is preserved
Initial instant. Before the crash
p₀ = m v +0
Final moment. Right after the crash
[tex]p_{f}[/tex] = (m + m) v_{f}
how the moment is preserved
p₀ = p_{f}
m v = 2 m v_{f}
v_{f} = v / 2
we calculate
v_{f} = 12/2
p_{f} = 6 m / s
Which two options describe physical properties of matter?
A: weather a substance forms from a patina
B: whether a substance is acidic or basic
C: The color of the light that is reflected of a substance’s surface
D: The amount of mass per unit volume
F: how easily a substance reacts with other substances
Answer:
C: The color of the light that is reflected off a substance's surface
D: The amount of mass per unit volume
Explanation:
just took this!
Options C and D are correct.
C: The color of the light that is reflected on a substance’s surface
D: The amount of mass per unit volume.
What is the matter?Physical and chemical features can be used to classify matter. The matter is defined as something that occupies space and has mass. Solid, liquid, and gaseous are the three states of matter.
C: The color of the light that is reflected on a substance’s surface
If the light is completely absorbed, the thing appears black; if the light is completely reflected, the object appears white. The wavelengths of light that a material absorbs determine its color.
Hence it is an important property of matter.
D: The amount of mass per unit volume.
Density is defined as the mass per unit volume.it is denoted by ρ. It is the most important parameter to define the property of a matter.
Density shows the compactness of matter. it is calculated per unit volume. The density is used to find the space for the material that has to be filled.
Due to the above reasons options, C and D are correct.
To learn more about the matter refer to the link;
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List the location in order from lear to greatest pressure
The density of ice is 917 kg/m^3, and the density of sea water is 1025 kg/m^3. A swimming polar bear climbs onto a piece of floating ice that has a volume of 6.78 m^3. What is the weight of the heaviest bear that the ice can support without sinking completely beneath the water?
Answer:
w_bear = 7175.95 N , m = 732.24 kg
Explanation:
Let's analyze the situation a bit, the ice block is in equilibrium with the thrust given by Archimedes' law that is directed towards the bottom, the weight of the ice and the weight of the bear.
B -W_ice - w_bear = 0
w_bear = B - W_ice
The thrust is given by
B = ρ g V
B = 1025 9.8 6.78
B = 68 105.1 N
Note that we use the total volume of the block since the problem indicates that it is submerged.
The weight of the ice is
W_ice = m g
the density is
ρ_ice = m_ice / V
m_ice = rho_ice V
we substitute
W_ice = ρ_ice g V
W_ice = 917 9.8 6.78
W_ice = 60929.15 N
we substitute in the first equation
w_bear = 68105.1 - 60929.15
w_bear = 7175.95 N
the mass of this bear is
w_bear = m g
m = w_bear / g
m = 7175.95 / 9.8
m = 732.24 kg
Determine the magnitude of the force between two 42 m-long parallel wires separated by 0.03 m, both carrying 6.3 A in the same direction.
Answer:
The magnitude of the force between the two parallel wires is 0.0111 N.
Explanation:
Given;
length of the two parallel wires, L = 42 m
distance between the two wires, r = 0.03 m
current in both wires, I₁, I₂ = 6.3 A
Therefore, the magnitude of the repulsive force between the two parallel wires is given by;
[tex]F = \frac{\mu_0 I_1I_2l}{2\pi r}\\\\where;\\\mu_0 \ is \ permeability \ of \ free \ space = 4\pi *10^{-7} \ T.m/A \\\\F = \frac{(4\pi *10^{-7})(6.3)^2(42)}{2\pi (0.03)}\\\\F = 0.0111 \ N[/tex]
Therefore, the magnitude of the force between the two parallel wires is 0.0111 N.
You are currently getting 26 sales opportunities per day and closing 64% of them. How many sale opportunists per day?
Answer: 16
Explanation:
sandra wants to lower her body fat percentage which choices will help her reach her goal
Sandra can take to lower her body fat percentage to eat several, balanced, low-calorie meals throughout the day and to exercise regularly.
What is body fat?When we can't access food for a lengthy period of time, fat is a vital source of stored energy.
There are several steps Sandra can take to lower her body fat percentage:
Exercise regularly: Regular physical activity, such as cardiovascular exercise, resistance training, and high-intensity interval training (HIIT), can help increase muscle mass and reduce body fat.
Eat a healthy diet: Eating a balanced diet that includes plenty of fruits, vegetables, whole grains, lean proteins, and healthy fats can help Sandra maintain a calorie deficit, which is necessary for reducing body fat. Avoiding processed foods, added sugars, and excessive amounts of saturated and trans fats can also be beneficial.
Control portions: Paying attention to portion sizes can help Sandra avoid overeating and maintain a calorie deficit. She can also use tools like measuring cups and a food scale to help control portion sizes.
Stay hydrated: Drinking enough water can help Sandra maintain a healthy metabolism and reduce feelings of hunger.
Get enough sleep: Getting adequate sleep (7-9 hours per night) can help regulate hormones that impact metabolism and hunger, making it easier to maintain a calorie deficit and reduce body fat.
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Pulling out of a dive, the pilot of an airplane guides his plane into a vertical circle with a radius of 600 m. At the bottom of the dive, the speed of the airplane is 150 m/s. What is the apparent weight of the 70-kg pilot at that point?
Answer:
3311N
Explanation:
r = radius = 600m
V = speed = 150m/s
Mass = weight = 70kg
The weight of pilot when calculated due to circular motion
W = tv
Fv = mv²/r
Fv = 70x150²/600
Fv = 79x22500/600
= 15750000/600
= 2625N
Real Weight of the pilot = m x g
= 70 x 9.8
= 686N
The apparent Weight is calculated by
Mv²/r + mg
= 2625N + 686N
= 3311 N
Therefore the apparent Weight is 3311N
A pan of water is sitting on an electie over the stove is then turned on to high What will happen to the movement of the particles in the pan?
The particles that make up the pan will move closer together
The parties that make up the pan will not be affected
The particles that make up the pan will speed up
The partides that make up the pan will slow down
Answer:
The particles that make up the pan will speed up
Explanation: