Answer:
sorry really need points thanks tho
as a prefect,
prepare a short speech about the laboratory
Answer:
School labs are a great place for students which help them enhance their learning by understanding the theoretical concepts of science which are taught in classrooms. Well-designed laboratories not only make science experiments fun but also help students in achieving good academic results.
Explanation:
hope this helps :)
A tadpole swims across a pond at 8.50 cm/s. The tail of the tadpole exerts a force of 28.0 mN to overcome drag forces exerted on the tadpole by the water.
What is the power output?
Can someone explain me, please!
Answer:
2.38 mW
Explanation:
Power is work per unit time. Work is the product of force and distance. That means ...
[tex]\text{power}=\dfrac{\text{force}\times\text{distance}}{\text{time}}=\text{force}\times\dfrac{\text{distance}}{\text{time}}\\\\\text{power}=\text{force}\times\text{velocity}[/tex]
Using the given values of force and velocity, the tadpole's power output is ...
P = (0.028 N)(0.085 m/s) = 0.00238 W = 2.38 mW
The tadpole's power output is about 2.38 mW.
Cold air holds less water than warm air.
True
False
Answer:
The answer is for your question is :
Explanation:
True
Discuss the relevance of studying physics in relation to mining engineering?
the relevance of studying physics in relation to mining engineering
A train has a final velocity of 110 km/h. It accelerated for 36 s at 0.50 m/s2 . What was its initial velocity
The initial velocity of the train is 12.56 m/s.
Initial velocity
The initial velocity of the train can be determined by using the first kinematic equation as shown below;
v = u + at
u = v - at
where;
v is the final velocity = 110 km/h = 30.56 m/su is the initial velocityu = 30.56 - (36 x 0.5)
u = 12.56 m/s
Thus, the initial velocity of the train is 12.56 m/s.
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A 4.6 kg bucket is held by a string and whirled in a vertical circe. The radius of the circle is 9.4 m. The speed of the bucket is 8.0 m/s at the top of the loop and 9,9 m/s at
the bottom of the loop. What is the acceleration the bucket will experience at the top of the loop?
Answer:
Let T + m g = m v^2 / R
At the top of the loop T can be zero and the force of gravity provides the necessary centripetal force
v^2 / R = a = g
a = 8^2 / 9.4 = 6.81 m/s^2
Can you help me with all 14 of this?
Answer: Can't see the graph clearly.
A 2.9-kg block slides with a speed of 2.1 m/s on a frictionless horizontal surface until it encounters a spring. (a) If the block compresses the spring 5.6 cm before coming to rest, what is the force constant of the spring
Answer:
spring force
Explanation:
The spring force is the force exerted by a compressed or stretched spring upon any object that is attached to it. An object that compresses or stretches a spring is always acted upon by a force that restores the object to its rest or equilibrium position.
Why do metals conduct electricity?
A. The electrons in metals are inside the nuclei of the atoms.
B. All covalent bonds conduct electricity.
C. A lattice of ions allows valence electrons to move easily.
D. Metals never give up electrons.
Why do metals conduct electricity?
A. The electrons in metals are inside the nuclei of the atoms.
B. All covalent bonds conduct electricity.
C. A lattice of ions allows valence electrons to move easily. ✓
Free electrons help the electricity to spread all over the metal,making it a good conductor of electricityD. Metals never give up electrons.
300cm3 of O₂ will be collected over water at a temperature of 25°c and 1atm (101325 NM-2) What will be the volume of dry oxygen at S.T.P? (water pressure at 25c is 16630M²)
The volume of the gas is calculated as 1827.87cm^3
Data;
Initial volume (v1) = 300cm^3Initial Pressure (p1) = 1atm = 101325 NM^-2Final Volume = ?Final Pressure (P2) = 16630NM^-2Boyle's LawTo find the final volume of oxygen, we have to use Boyle's law which states that the volume of a gas is inversely proportional to the pressure of the gas provided that temperature remains constant.
v ∝ 1/p
[tex]v = \frac{k}{p} \\k = pv\\p_1 v_1 = p_2 v_2[/tex]
Let's substitute the values into the equation and solve.
[tex]p_1v_1 = p_2v_2\\101325*300 = 16630 * v_2\\30397500 = 16630v_2\\v_2 = \frac{30397500}{16630} \\v_2 = 1827.87cm^3[/tex]
The volume of the gas is calculated as 1827.87cm^3
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what is kinematics ?
explain ~
Answer:
the branch of mechanics concerned with the motion of objects without reference to the forces which cause the motion.
and/or
Kinematics is the study of motion of a system of bodies without directly considering the forces or potential fields affecting the motion. In other words, kinematics examines how the momentum and energy are shared among interacting bodies.
A train is moving with an acceleration of O m/s2 and a velocity of 60 km/hr. Is this
possible? Explain your answer.
Answer:
I presume that by O you mean zero.
a = (v2 - v1) / t for uniformly accelerated motion
If v2 = v1 then any velocity is theoretically possible. (with no acceleration)
How is kinetic energy turned into electricity?
How long does it take for a whale travelling at 15 m/s to travel 100 m?
1/80 Hour...................
what is photosynthesis
Answer:
photosynthesis is the process where by plants/green plants make their own food
what is the value of Stephen's constant ?
thankyou ~
condition necessary for thermodynamic equilibrium
Answer:
For a thermodynamic system to be in equilibrium, all intensive (temperature, pressure) and extensive thermodynamic properties (U, G, A, H, S, etc) must be constants. Hence, the total change in any of those properties (dℑ ) must be zero at equilibrium.
Explanation:
hope it helps :)
Answer: For a thermodynamic system to be in equilibrium, all intensive (temperature, pressure) and extensive thermodynamic properties (U, G, A, H, S, etc) must be constants. Hence, the total change in any of those properties (dℑ ) must be zero at equilibrium.
Explanation:
In the combo circuit diagrammed, R1 = 19.2 Ω, R2 = 20.7 Ω, and R3 = 25.8 Ω. Find the equivalent resistance of the circuit.
Answer:
Equivalent resistance: 13.589 Ω
Explanation:
R series = R1 + R2 + R3 ...
[tex]\frac{1}{R_{eq} } = \frac{1}{R1} +\frac{1}{R2} +\frac{1}{R3} ...[/tex]
Find the equivalent resistance of the right branch of the circuit:
[tex]R_{eq} = R_{2} +R_{3} \\R_{eq} = 20.7 + 25.8 = 46.5 ohms[/tex]
[tex]\frac{1}{R_{eq} } = \frac{1}{19.2} +\frac{1}{46.5}\\\\\frac{1}{R_{eq} } = 0.0735887097\\\\R_{eq} = 13.5890411[/tex]
You can test the flexibility in the backs of your legs, hips, and lower back with the “sit-and-reach” activity.
true or false
I NEED ANSWER TODAY RN!!!
Mother Father Jane Matt
brown eyes blue eyes brown eyes brown eyes
curly hair straight hair straight hair curly hair
Jane and her brother Matt look a little bit alike. Jane made a table. She wanted to figure out how she and Matt inherited certain traits.
Based on Jane's table, what can she say about their inherited traits?
Question 1 options:
A. Jane and Matt look like their mother.
B. Only a father can pass on the color of eyes.
C. Hair type is not passed down from parent to child.
D. Jan and Matt inherited eye color from their mother.
Traits are the expression of alleles combination in a genotype, and depend on the inherited alleles and the inheritance pattern. Option D. Jane can say that she and Matt inherited eye color from their mother.
How are traits inherited?Traits are the expression of the allelic combination in a genotype. The expressed phenotype will depend on the alleles inherited from each parent and the inheritance pattern.
According to the segregation principle, alleles separate during gamete formation. And during fertilization, two gametes from different parents merge to produce a zygote.
Each gamete carries one of the parental alleles. During fertilization occurs a combination of alleles that will express a phenotype.
Traits inheritance do not depend on each other, they are inherited by separate.
In the exposed example, eye color and hair type expression depend on the combination of the alleles in each genotype. And each trait is independently inherited from the other one.
Available data:
Mother
brown eyescurly hairFather
blue eyesstraight hairJane
brown eyesstraight hairMatt
brown eyescurly hairA. Jane and Matt look like their mother ⇒ Only Matt looks like the mother because both of them have brown eyes and curly hair. Jane has brown eyes but straight hair.
B. Only a father can pass on the color of eyes ⇒ Both parents can pass the color of eyes, no only the father.
C. Hair type is not passed down from parent to child ⇒ Hair type is inherited from parents.
D. Jane and Matt inherited eye color from their mother ⇒ Yes, both of them inherited eye color from their mother. The three of them have brown eyes.
Based on her table, Jane can say that she and Matt inherited eye color from their mother. Option D.
You will learn more about trait inheritance at
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Please help me do this. Study the scenario.
A lever is used to lift a heavy weight. The length of the input arm of the lever is 3 m, the length of output arm is 1 m.
What is the mechanical advantage of the lever?
A.) 3
B.) 0.33
C.) 1
The mechanical advantage of the lever is 3 and the right option is A.) 3.
What is mechanical advantage?Mechanical advantage can be defined as the ratio of load to effort in a machine.
To calculate the mechanical advantage of the lever, we use the formula below.
Formula
M.A = y/x................ Equation 1Where:
M.A = mechanical advantage of the levery = distance moved by effort (input arm)x = distance moved by load (output arm)From the question,
Given:
y = 3 mx = 1 mSubstitute these values into equation 1
M.A = 3/1 M.A = 3.Hence, The mechanical advantage of the lever is 3 and the right option is A.) 3.
Learn more about mechanical advantage here: https://brainly.com/question/19038908
What percentage of the initial potential energy has been converted into heat instead of
kinetic energy?
The percentage of the initial potential energy that has been converted into heat is 18.07%.
Potential energy can be defined as the energy of a body due to its position in the gravitational field.
To calculate the percentage of the initial potential energy that has been converted into heat, we use the formula below.
Formula:
H(%) = [(P.E-K.E)/P.E]100............... Equation 1Where:
H = Energy converted to heatP.E = Potential energyK.E = Kinetic energy.But,
P.E = mgh........... Equation 2From the diagram,
m = mass = 0.5 kgh = 7 cm = 0.07 mg = 9.8 m/s²Substitute these values above into equation 2
P.E = (0.5×9.8×0.07) P.E = 0.343 JAlso From the diagram,
K.E = 0.281 J.Substitute these values into equation 1
H(%) = [(0.343-0.281)/0.343]100H(%) = 18.07%.Hence, the percentage of the initial potential energy that has been converted into heat is 18.07%.
Learn more about Potential energy here: https://brainly.com/question/1242059
A gun whose mass is 0.8kg fires a bullet whose mass is 0.016kg with a velocity of 700m/s, calculate the velocity of the gun recoils.
Answer:
A gun whose mass is 0.8kg fires a bullet whose mass is 0.016kg with a velocity of 700m/s, calculate the velocity of the gun recoils.
→ 14m/s
Hope its help
Question 7 of 10
Which of the following describes the products of a chemical reaction?
O A. The chemicals on the left side of a chemical equation
B. The substances that are changed
O C. The original materials
O D. The chemicals on the right side of a chemical equation
SLIRMIT
A 500 gram ball is hit with a force of 100 N, what is its acceleration in m/s^2?
Answer:
200 m/^2
Explanation:
Fnet =ma
100 =(0.5)(a)
100÷0.5= 0.5a ÷ 0.5 (divide both sides by 0.5)
200 m/s^2= a
What percentage of the initial potential energy has been converted into heat instead of
kinetic energy?
Answer:
ok yellow im new i mean hellow
Brainliest if correct
Answer:
D: Increase the distance between the objects.
E: Decrease the mass of one of the objects.
Jason stands on a cliff 24m above the ground and throws a ball upward at 16m/s determine the speed of the ball when it hits the ground below the cliff.
Answer:
27 m/s
Explanation:
Positive direction: up
v₀ = 16 m/s, y₀ = 24 m, g = -9.8 m/s², y = 0 (ground)
Use v² - v₀² = 2g(y - y₀)
v² - 16² = 2*(-9.8)*(0 - 24)
v² = 256 + 470.4 = 726.4
so v = 27 m/s
Answer:
About 26.95 m/s.
Explanation:
We can let downwards be the positive direction and upwards be the negative direction.
The ball is thrown upwards at a speed of 16 m/s. (Hence, the initial velocity is expressed as -16 m/s.)
Find the time it took for the ball to travel to its highest point. At this point, its velocity is zero. Find time t using a kinematic equation. In the vertical direction, the acceleration is gravity:
[tex]\displaystyle \begin{aligned} v_y & = v_i + gt \\ \\ (0) & = (-16\text{ m/s}) + (9.8\text{ m/s$^2$})t \\ \\ t &= \frac{80}{49} \text{ s}\end{aligned}[/tex]
Find the distance it traveled during this time by using the following kinematic equation:
[tex]\displaystyle \begin{aligned} y & = v_{i}t + \frac{1}{2}gt^2 \\ \\ & = (-16\text{ m/s})\left(\frac{80}{49}\text{ s}\right) + \frac{1}{2}(9.8\text{ m/s$^2$})\left(\frac{80}{49}\text{ s}\right)^2 \\ \\ & \approx -13.0612 \text{ m}\end{aligned}[/tex]
Hence, the ball traveled a total of 13.0612 meters when thrown into the air.
Thus, its total height is:
[tex]\displaystyle h_\text{max} = 24 \text{ m} + 13.0612 \text{ m} = 37.0612\text{ m}[/tex]
At this point, it will fall back down with an initial velocity of zero.
Find the time it took for the ball to hit the ground below the cliff:
[tex]\displaystyle \begin{aligned} y & = v_{i}t + \frac{1}{2}gt^2 \\ \\ (37.0612\text{ m}) & = (0\text{ m/s})t + \frac{1}{2}(9.8\text{ m/s$^2$})t^2 \\ \\ t & \approx 2.75\text{ s} \end{aligned}[/tex]
Find its final velocity using a kinematic equation:
[tex]\displaystyle \begin{aligned} v_{f} & = v_{i} + gt \\ \\ & = (0\text{ m/s}) + (9.8\text{ m/s$^2$})(2.75\text{ s}) \\ \\ & = 26.95\text{ m/s}\end{aligned}[/tex]
In conclusion, the final velocity of the ball is about 26.95 m/s.
Physics like really need help please
Answer:
Explanation:
Consider first case with incline:
It is frictionless so the only force on mass is gravity, g.
The force has two components: one that is along the incline direction and another perpendicular to the incline.
The perpendicular component does no work as it is perpendicular to the direction of motion.
The incline component of gravity = g*sinθ
=10*sin30deg; using 10m/s^2 for g
Length of incline = 5/sinθ = 5/sin30deg
Work done = force * distance
= mass * acceleration * distance
= 5 * 10*sin30deg * 5/sin30deg
= 250J
Mass starts from rest so its initial speed=0
Using the kinematic equation: final speed^2 = initial speed^2 + 2*acceleration*distance
Final speed^2 = 0 + 2*(10*sin30deg)*(5/sin30deg)
= 2*10*5
=100
Final speed = 10m/s
Now for the second case of vertical drop:
Work done by gravity = mass * gravity * height
= 5 * 10 * 5
= 250J
Using conservation of energy, Final kinetic energy = Work done by gravity
1/2 * Mass * Final speed^2 = 250
Final speed^2 = 2 * 250 / 5 = 100
Final speed = 10m/s
In both scenarios, the work done by gravity and the mass' final speed are the same.
If the electrical resistance of a household appliance becomes four times larger than the original value, how much current does the appliance then use
If the electrical resistance of a household appliance becomes four times larger than the original value, AND the voltage at the outlet doesn't change, then the appliance starts to use 1/4 of the original current.
I = E / R
