The box is pulled horizontally across the floor by a force of 100 N and opposed by a frictional force of 60 N. The object accelerates at 4 m/s2 .
Answer:
10 kg
Explanation:
first find resultant force by subtracting the forces mass is force ÷ accelerationA net force of 125 N is applied to a certain object. As a result, the object accelerates with an acceleration of 24 m/s2. The mass of the object is
Answer:
5.2 kg
Explanation:
mass Is force divided by the acceleration125÷4 5.2083333333(b) A ray of light in glass travels towards a flat boundary with air. The angle of incidence is
51°. This ray does not emerge into the air. State and explain what happens to this ray.
Answer:
Total internal reflection
The planets move around the stars in different orbits .which planet will have the shortest of revolution (year)?
Planet 1
Planet 2
Planet 3
Planet 4
4 because it's closest to the star
Un objeto de 1.50 kg se mantiene 1.20 m sobre un resorte vertical relajado sin masa con una constante de fuerza de 320 N/m. Se deja caer el objeto sobre el resorte. ¿Cuánto comprime al resorte?
Answer:
El resorte se comprime 0.38 m.
Explanation:
La distancia de compresión del resorte se puede calcular por conservación de la energía:
[tex] \Sigma E_{i} = \Sigma E_{f} [/tex]
[tex] E_{p} = E_{e} [/tex]
[tex] mgh = \frac{1}{2}kx^{2} [/tex] (1)
En donde:
[tex]E_{i}[/tex] y [tex]E_{f}[/tex]: son las energías inciales y finales
[tex] E_{p}[/tex]: es la energía potencial gravitacional
[tex]E_{e}[/tex]: es la energía potencial elástica
m: es la masa = 1.50 kg
g: es la gravedad = 9.81 m/s²
h: es la altura
k: es la constante de fuerza = 320 N/m
x: es la distancia de compresión
Dado que el objeto está 1.20 m sobre el resorte, entonces h es:
[tex] h = 1.20 + x [/tex] (2)
Entonces, introduciendo la ecuación (2) en (1) y resolviendo para x tenemos:
[tex] \frac{1}{2}kx^{2} - xmg - 1.20mg = 0 [/tex]
[tex] 160x^{2} - 14.72x - 17.66 = 0 [/tex]
Resolviendo la ecuación cuadrática anterior tenemos:
x₁ = -0.29 y x₂ = 0.38
Tomando el valor positivo entonces, el resorte se comprime 0.38 metros.
Espero que te sea de utilidad!
what are the four main elements of matter
Answer:
Earth, Water, Air, Fire.
Explanation:
Answer:
Earth, Water, Air, Fire
Explanation:
What is a parallel universe, and could there potentially be ones that contain doppelgängers of everyone on Earth?
Answer:
what i commented.
Explanation:
One of the solid reactants was treated in a coffee grinder before adding to
the reaction container. *
O
A. Concentration
B. Temperature
C. Surface Area
D. Catalyst
E. Agitation
Answer:
C. Surface area
Explanation:
The rate of chemical reaction depends on various factors such as:
concentration and pressurenature of reactantstemperaturesurface areapresence of catalyst, etc.Effect of surface area of reactants: the rate of a chemical reaction can be increased by increasing the the area of contact of the reacting substances. This is especially important when one or more of the reactants are solids., because only the particles of the solid that are exposed are able to take part in the reaction at each instant of time. Therefore, the greater the surface area of the solid reactant particles the faster the reaction.
The surface area of solid reactants can be increased by grinding or pelletizing, thus allowing for a greater contact between the reacting particles,
The instance in which one of the solid reactants was treated in a coffee grinder before adding to the reaction container is one way of increasing the surface area of a reactant.
How many oxygen (O) atoms are in a molecule of SiO2?
O A. 1
OB. 3
C. 4
D. 2
Two forces one of 12N and another of 5N act on abody in such away that they makes an angel of 90 with each other, what is the resultant
Answer:
13 N
Explanation:
From the question,
If two forces act at right angle to each other, Their result force can be calculated using Pythagoras theorem.
R'² = R₁²+R₂²....................... Equation 1
Where R' = Resultant force, R₁ = First force, R₂ = Second force.
Given: R₁ = 12 N, R₂ = 5 N
Substitute these values into equation 1
R'² = 12²+5²
R'² = 144+25
R'² = 169
R' = [tex]\sqrt{169}[/tex]
R' = 13 N.
Hence the resultant force is 13 N
Identify all the items James Naismith used to create the game of basketball. Selected:a. A basketballThis answer is incorrect. b. A peach basket c. A soccer ball d. A ten foot pole
Answer:
A & B
Explanation:
He used 2 peach basket and a soccer ball
An object at rest stays at rest and an object in stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force is Newton’s 1st law of motion
True or false
Answer:
Hi I'm happy to meet you and the answer for your question is true. If you need me to state the law ask me
will mark as brainliest . pls help
Answer:
answer D
Explanation:
circuit breaker is useful when you do something with your domestic electric circuit..
PLEASE HELP!! due SOON!!! A LOT OF POINTS
Answer:
they are both clocks i think please be right
The momentum of an object is determined to be 7.2 x 10-3 cm kg x m/s. Express this as provided or use any equivalent unit. How is this expressed in value and units?
Complete Question:
The momentum of an object is determined to be 7.2 × 10-3 kg⋅m/s. Express this quantity as provided or use any equivalent unit. (Note: 1 kg = 1000 g).
Answer:
7.2 gm/s.
Explanation:
Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.
Mathematically, momentum is given by the formula;
[tex] Momentum = mass * velocity [/tex]
Given the following data;
Momentum = 7.2 * 10^-3 kgm/s
1 kg = 1000 g
Substituting the unit in kilograms with grams, we have;
Momentum = 7.2 * 10^-3 * 1000 gm/s
Momentum = 7.2 gm/s.
3) 3 A force of -4.4x10^33 N exists between a positive charge of 8.0x10^-4 C and a
negative charge -3.0x10^-4 C. What is the distance that separates the charges?
Answer:
[tex]r=7\times 10^{-16}\ m[/tex]
Explanation:
The force between charges, [tex]F=-4.4\times 10^{33}\ N[/tex]
Positive charge, [tex]q_1=8\times 10^{-4}\ C[/tex]
Negative charge, [tex]q_2=-3\times 10^{-4}\ C[/tex]
We need to find the distance between charges. The force of attraction between charges is given by :
[tex]F=\dfrac{kq_1q_2}{r^2}[/tex]
Where
r is the distance between charges
[tex]r=\sqrt{\dfrac{kq_1q_2}{F}} \\\\r=\sqrt{\dfrac{9\times 10^9\times 8\times 10^{-4}\times 3\times 10^{-4}}{4.4\times 10^{33}}} \\\\r=7\times 10^{-16}\ m[/tex]
So, the distance between charges is [tex]7\times 10^{-16}\ m[/tex].
Which statements about acceleration are true?
Check all that apply.
A. Acceleration is found by dividing the change in speed by the
change in time.
B. Acceleration is a vector quantity.
C. The symbol used for acceleration is a
D. The SI units for acceleration are m/s^2
Answer:
B
C
D
My answers... I hope this helps
How many significant figures does the following number have 0.056
2
3
1
5
4
What is the symbol for a change in position?
Ad
p
d
Ap
change in position of an object we use the
symbol ∆×\ delta×∆×for displacement, where ∆. means
"change" ∆ vector quantity with units of distances start
text ,d,I,s,t,a,n,c,e , end text.
How many penalties must a player get to be disqualified from the game?
Answer: five
Each player may accrue up to five personal fouls a game prior to disqualification. A common foul occurs away from the ball and does no affect attempted shots. Free-throws: Penalty shots are awarded as follows: a) one free throw for a shooter whose goal is successful and is fouled while shooting.
Explanation:
Answer:
5
Explanation:
A potato is which part of the plant?
root
stem
leaf
flower
A moving electric charge is surrounded by:
no field
an electric field only
both an electric field and a magnetic field
a magnetic field only
Answer:
both an electric field and a magnetic field
Explanation:
Una caloría (cal) es la cantidad de transferencia de energía necesaria para elevar la temperatura de 1 g de agua de 14,5 °C a 15,5 °C.
Answer:
Verdadera.
Explanation:
La caloría se puede definir como una unidad estándar utilizada para medir la cantidad de energía presente en un organismo vivo.
Una caloría (cal) es la cantidad de transferencia de energía necesaria para elevar la temperatura de 1 g de agua de 14,5 °C a 15,5 °C.
Generalmente, es una unidad de medida de energía e igual a 4,1855 julios.
Why are very high temperatures and pressures required for fusion to occur?
to generate the neutrons that are needed to break the nuclei
to overcome the repulsion between the protons in the nuclei that join
to maintain the proper conditions to keep the chain reaction going
to keep the uranium fuel separate from the control rods
Explanation:
to overcome the repulsion between the protons in the nuclei that join
Answer:
bBBBB
Explanation:
to overcome the repulsion between the protons in the nuclei that join
Calculate the tangential speed of a yo-yo twirled at the end of a 4 meter long string at 2 revolutions per second.
Answer: 50 m/s
Explanation: speed v = 2· pi·n·r = 2· 3.14· 2 s^-1· 4 m
The water level at the beach changes on a regular basis. What is the primary force that causes these changes in water levels?
Explanation:
The water level at the beach changes on regular basis because of high and low tides in the sea. The high tide and low tide in the sea is because of moons gravitational force on Earth. The tide are low or high depends upon the differences in how much the moon's gravity pulls on different parts of Earth. Places where pull is less experience low tide whereas places where pull is more experience high tide.
what is the mass of a 100-N crate of delicious candy
Answer:
Explanation:
weight ( w ) = 100 N
mass (m) = ?
WE know
g = 10 m/s²
w = m * g
or
m = w / g
m = 100 / 10
m = 10 kg
hope it will help :)
If an object is tossed up into the air, what is its velocity at the top of the object's path? (Units are ms-1)
Answer: [tex]0\ ms^{-1}[/tex]
Explanation:
Given
If an object reaches the topmost point i.e. it cannot travel beyond that point as its velocity is zero at the topmost point
As some velocity is needed to move the object, so velocity at topmost point is zero
Decide whether these are true or false. Type out the whole sentence in the space and type a "T" beside the letter. Retype the sentences that are not correct. A. An object has acceleration if its velocity is changing. B. Force is measured in joules. C. Gravity is a force.
Answer:
1. True.
2. False.
3. True.
Explanation:
A. True: An object has acceleration if its velocity is changing. In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.
B. False: Force is measured in joules. Force is a product of the mass of an object and its rate of acceleration. Thus, force is actually measured in Newton.
C. Gravity is a force. Gravity is considered to be a universal force of attraction which acts between all objects that has both mass, energy and occupy space. Therefore, it acts in such a way as to bring objects together.
Guys I need help on this
Answer:
I think its B.
Explanation: