Answer:
Specific heat capacity, = 2.1J/g°C
Explanation:
Given the following data;
Mass = 250g
Quantity of heat = 34.125kJ = 34.125 * 1000 = 34125 Joules.
Change in temperature = 65.0∘C
To find the specific heat capacity;
Heat capacity is given by the formula;
[tex] Q = mcdt[/tex]
Where;
Q represents the heat capacity or quantity of heat.
m represents the mass of an object.
c represents the specific heat capacity of water.
dt represents the change in temperature.
Making c the subject of formula, we have;
[tex] c = \frac {Q}{mdt} [/tex]
Substituting into the equation, we have;
[tex] c = \frac {34125}{250*65} [/tex]
[tex] c = \frac {34125}{16250} [/tex]
Specific heat capacity, = 2.1J/g°C
A rock has 750 J of potential energy as it sits on a ledge. If the rock were pushed off the ledge, how much would it have just before it hit the ground?
Answer:
the 750 j will have potential energy is 375
Explanation:
750/2 is 375
According to Einstein, space and time are _____
dimensions. Masses in the universe _____
and are parts of a whole universe that has four
space-time, and the resulting shape of space-time causes _____ .
Answer:
Relative; curved; gravity.
Explanation:
According to Einstein, space and time are relative and are parts of a whole universe that has four dimensions. Masses in the universe curved space-time, and the resulting shape of space-time cause gravity.
The above theory is known as the General Relativity or General Theory of Relativity and it was published in 1915 by Albert Einstein.
Basically, it states that universe curved space-time is directly proportional to the energy and momentum of matter and radiation that is present. Thus, gravity is the universe curved space-time caused by massive objects.
Answer:
Complete the passage to describe one of the features of Einstein’s general theory of relativity.
According to Einstein, space and time are
relative
and are parts of a whole universe that has four dimensions. Masses in the universe
curve
space-time, and the resulting shape of space-time causes
gravity
correct on Edge2021
A bullet at 800 m/s horizontally hits a target that is 180m away. How far does the bullet fall before it hits the target?
a car travels straight for 20 miles on a road that is 30 north of east. what is the easiest component of the cars displacement to the nearest tenth of a mile
A -17.3 miles
B -10.0miles
C 10.0 miles
D 17.3 miles
Answer:
17.3 miles
Explanation:
How much energy is transferred electrically by a 2000 W cooker in half an hour?
Responder:
E = 1440 kJ
Explicación:
Se da que,
La potencia de un horno de cocción es de 800 W
El voltaje al que se opera es de 230 V
Tiempo, t = 30 minutos = 1800 segundos
Necesitamos encontrar la energía eléctrica utilizada por el horno de cocción. El producto de la potencia y el tiempo es igual a la energía consumida. Entonces,
Which natural hazards are most likely to affect Florida, due to its geography? Check all that apply. PLS HELP! I WILL GIVE BEST ANSWER BRAINLIEST! 15 POINT EACH! PLS HELP!
Answer:
drought, floods, rip currents, tropical cyclones, wildfires
Explanation:
right on edge
A hair dryer transfers 48K J of energy in one minute. What is the power rating of the hairdryer? *
Answer:
800W
Explanation:
48,000/60=800
The power rating of the hairdryer is 800W.
What is Power?Power can be defined as the rate at which work is done by an object. The S.I unit of power is Watt(W).
The formula of power will be
Power = Work done/time
A hair dryer transfers 48K J of energy in one minute.
1 minute = 60 seconds
P = 48,000/60
P = 800 W
Hence, the power rating of the hairdryer is 800W.
Learn more about power.
https://brainly.com/question/15120631
#SPJ5
A rightward force of 460 N is applied to a 286-kg crate to accelerate it across the floor
at what rate?
Answer:
Acceleration = 1.61 m/s²
Explanation:
Given the following data:
Force = 460N
Mass = 286kg
To find the acceleration;
Force = mass * acceleration
Substituting into the equation, we have;
460 = 286 * acceleration
Acceleration = 460/286
Acceleration = 1.61 m/s²
constriction is made in a clinical thermometer why
subject :science (energy)
Answer:
The constriction in the thermometer is to prevent the mercury from dropping back to the bulb when the reading is being taken. It is easier for us to take reading. It prevents the thermometric substance (Mercury or Alcohol) from running back into the bulb.
Explanation:
Hope it is helpful....
Answer:
constriction is made in a clinical thermometer because it prevents the thermometric liquid from running back into the bulb.
two girls drag a bag across the floor. One girl exerts a force of 10 newtons and the other girl a force of 30 Newton's in the same direction. Calculate the resultant force on the bag.
Answer:
Explanation:
The resultant would be a combination of the two forces. We need to add them together since they are exerting a force in the same direction.
10+30= 40 N of force
Which is an advantage of storing data digitally?
A. It is easy to copy a computer virus to a device along with the data.
B. Other people can access personal data from unsecured devices.
C. The quality of copies decrease as more copies are made.
O D. It is easy to change the data if you have the right computer
programs
Answer:
D
Explanation:
Because I said so
Limestone cave can develop when Limestone rock is weathered. The weathering of the rock leaves an empty space that forms the cave. Which of the following best explains how the Limestone weathered?
Answer:
he shape is like granite, other rocks like this are shaped in the weather.
Explanation:
He shape is like granite, other rocks like this are shaped in the weather.
What is Limestone?The primary source of the substance lime is limestone, a form of carbonate sedimentary rock composed primarily of calcium carbonate (CaCO3).
The minerals calcite and aragonite, which are various crystal forms of CaCO3, make up the majority of its material. As these minerals separate from water that has dissolved calcium, limestone is created.
Both biological and nonbiological activities can contribute to this, while biological processes—like the buildup of corals and shells in the sea—have probably been more significant during the past 540 million years.
Therefore, He shape is like granite, other rocks like this are shaped in the weather.
To learn more about Limestone, refer to the link:
https://brainly.com/question/30717890
#SPJ5
All forces acting upon a body are equal in magnitude
and opposite in direction. The object is initially
motionless and will remain motionless.
What is this condition called?
Answer:
Explanation:
It's called static equilibrium. The object is motionless and every force equals/cancels each other out
PLEASE HELP !! A 10 ohm resistor is connected to a 9V battery how much current is flowing through the circuit?
Resitance (R)= 10 Ohm
Potential difference (V) = 9V
V= IR
I= V/R
I= 9/10
I= 0.9 Ampere
Therefore 0.9 Ampere of current is flowing through the circuit.
The current through the circuit can be calculated using Ohm's law. The current flowing through the circuit with a resistance of 10 ohm and 9 V is 0.9 ampere.
What is Ohm's law?Ohm's law states that the potential difference or voltage across a circuit is the product of the current and resistance through the circuit. Thus as current or resistance increases, voltage across the circuit also increases.
According to Ohm's law, V= IR.
Given the voltage V = 9 V
Resistance R = 10 ohm
Current = voltage/ resistance (V/R)
= 9 V/ 10 Ω.
= 0.9 A.
Therefore, the current passing through the circuit is 0.9 A.
To find more on Ohm's law, refer here:
https://brainly.com/question/1247379
#SPJ2
Determine the torque
produced by a perpendicular force of 75
N at the end of a 0.2 m wrench.
Answer:
Explanation:
the answer is C.)
The torque produced by a perpendicular force of 75 N at the end of a 0.2 m wrench is 15 Nm.
What is torque?The force which causes the object to rotate about any axis is called torque. In math form, it is equivalent to the product of force and perpendicular distance.
Torque is a twisting or turning force that frequently results in rotation around an axis, which may be a fixed point or the center of mass. The ability of something rotating, such as a gear or a shaft, to overcome turning resistance is another way to think of torque.
Given:
The perpendicular force on the wrench, P = 75 N,
The length of the wrench, r = 0.2 m,
Calculate the torque of the wrench as shown below,
The torque of the wrench = r × P × sin a
Here, the force is perpendicular hence, a = 90°
The torque of the wrench = 0.2 × 75 × sin90
The torque of the wrench = 15 × 1
The torque of the wrench = 15
Thus, the torque on the wrench is 15 Nm.
To know more about torque:
https://brainly.com/question/28220969
#SPJ2
The less mass an object has, the --- its gravitational f
Answer:
The less mass an object has, the less its gravitational [force.]
Explanation:
Newton's Law of Gravity states that [tex]F_G=\frac{Gm_1m_2}{r^{2}}[/tex]. The two m values are the objects' masses, G is the gravitational constant, and r is the distance between the objects' centers. Notice how the mass values are in the fraction's numerator? That means increasing the mass of one or both objects increases [tex]F_G[/tex]. That also implies the inverse; decreasing the mass of one or both objects decreases [tex]F_G[/tex]!
I hope this helps you understand this concept a little more! Have yourself a fantastic day, 'kay?
Can someone pls help me with these questions I’ll give brainliest
Answer:
1= ionic bond
2 =covalent bonding
Explanation:
can answer the others sorry
What is the reaction force to a foot pushing down on the floor?
a. The foot going through the floor
b. The floor breaking to the foot
c. The floor pushing back against the foot
Answer:
C. The floor pushing back against the foot
Explanation:
How many additional electrons does this atom of oxygen need in its valence shell to satisfy the octet rule? two four six eight
Answer:
the answer is 2 electrons
Explanation:
The oxygen atom has atomic number 8, therefore its electronic configuration is
1s² 2s² 2p⁴
the sublevel s has a capacity for 2 electrons so it is full
the sublevel p has capacity for 6 electrons, as in this atom it has only 4 electrons it needs two (2) more electrons to have its full capacity and to achieve maximum stability.
Consequently the answer is 2 electrons
Answer: The guy above is correct!
Explanation: It is A. two
Which is an example of potential energy?
A baseball player running the bases )
B. A baseball player doing stretches
C. A ball lying on the ground
D. A pitcher throwing a pitch
tell me why
Answer:
D
Explanation:
He is storing energy to throw it.
Potential Energy = Stored Energy
+
1. Energy due to motion is
_______ energy
Answer:
Kinetic energy
Explanation:
The energy associated with an object's motion is called kinetic energy. A speeding bullet, a walking person, and electromagnetic radiation like light all have kinetic energy.
Kinetic energy. For example, a walking person.
A ball of mass 12 kg is released from a height of 2.5 m
find the gravitational potential energy of the ball at point A
and when it reach the ground.
then deduce the kinetic energy of the ball once it reach the ground
(use g=10 N/kg) * 5
Answer:
300 J
Explanation:
From conservation of energy;
Gravitational potential energy at top = Kinetic Energy at bottom
mgh = ½mv²
We are given;
Mass; m = 12 kg.
Height; h = 2.5 m
g = 10 m/s²
Thus;
mgh = 12 × 2.5 × 10 = 300 J
Since mgh = Kinetic Energy at bottom.
Thus; kinetic energy of the ball once it reach the ground = 300 J
How many oxygens are in a pentoxide?
Answer:
four oxygen
Explanation:
PLEASE HELPPPPP!!!!!!!!!
A man drives south to work every
day. If his 55 mile commute
usually takes 0.75 hours, what is
his average velocity?
The man's average velocity is 73.3 mph (miles per hour).
What is average velocity?Average velocity is a measure of the rate of displacement of an object in a given direction. It is the total displacement of the object divided by the total time taken to cover that displacement. In other words, it is the distance an object travels divided by the time it takes to travel that distance. Average velocity is an important concept in physics, as it can provide insight into the motion of an object and the forces acting upon it. Average velocity can be calculated using the equation: velocity = displacement/time.
This can be calculated by dividing the distance (55 miles) by the time (0.75 hours). Mathematically, this can be expressed as:
velocity = (distance / time)
velocity = (55 miles / 0.75 hours)
velocity = 73.3 mph
To learn more about average velocity
https://brainly.com/question/28668011
#SPJ1
Bibek went to the swimming pool. he saw the pool to be shallower and is redy to jump into the swimmingpool . is it proper for him to jump? if not why ?
Answer:
A swimming pool appears shallower than it really is due to the phenomenon of REFRACTION. Due to refraction, from rarer medium( Air ) to denser medium ( water ), the pool looks shallower
Explanation:
Which celestial objects come in direct contact with earth
Answer:
Sun
Explanation:
Any asteroid in space is a celestial body. Classification of Celestial Bodies. A star is a form of a celestial object made up of a shining spheroid of plasma held together by its own gravity. The nearby star to Earth is the Sun.
The law of universal gravitation describes the relationships between
Group of answer choices
A. unbalanced force, balanced force, and net force.
B. speed, distance, and time.
C. speed, velocity, and acceleration.
D .force, mass, and distance.
Answer:
D force mass and distance
The molecules of a substance in a particular state of matter move freely with random motion. The average speed of the molecules is increasing. What is being described?
Answer:
A gas
Explanation:
A 0.42 kg soccer ball is moving down field with a velocity of 12 m/s. A player kicks the ball so that it has a final velocity of 18 m/s down field. What is the change in the balls momentum? and find the constant force exerted by the players foot on the ball if the two are in contact for 0.020 s?
Answer:
the change in momentum is 2.52 N·s
the constant force on the ball while in contact with the players foot is 126 N
Explanation:
p=momentum
m=mass
v=change in velocity
p=(0.42)(6)
p=2.52
The change in the ball's momentum is 2.52 kgms⁻¹
The constant force exerted by the players foot on the ball is 126 N
From the question,
We are to determine the change in momentum of the ball
Change in momentum calculated by using the formula,
[tex]\rho = m(v-u)[/tex]
Where [tex]\rho[/tex] is the change in momentum
[tex]m[/tex] is the mass
[tex]v[/tex] is the final velocity
and [tex]u[/tex] is the initial velocity
From the given information,
[tex]m = 0.42 \ kg[/tex]
[tex]u = 12 \ m/s[/tex]
[tex]v = 18 \ m/s[/tex]
Therefore,
Change in the ball's momentum,
[tex]\rho = 0.42 (18-12)[/tex]
[tex]\rho = 0.42 (6)[/tex]
[tex]\rho = 2.52 \ kgms^{-1}[/tex]
Hence, the change in the ball's momentum is 2.52 kgms⁻¹
For the force exerted by the players foot
Force is given by change in momentum with time
That is,
[tex]F = \frac{\rho}{t}[/tex]
Where
[tex]F[/tex] is the force
[tex]\rho[/tex] is the change in momentum
and [tex]t[/tex] is the time
From the given information
[tex]t = 0.020 \ s[/tex]
Therefore,
[tex]F = \frac{2.52}{0.020}[/tex]
[tex]F = 126 \ N[/tex]
Hence, the constant force exerted by the players foot on the ball is 126 N
Learn more on calculating change in momentum here: https://brainly.com/question/12144602