Answer:
you can predict where the juggling ball is going to land and the move you hand to catch it
Explanation:
If the specific heat of iron = 0.46J C, how much heat is needed to warm 50 g of iron from 20C to 100C
Answer:
1840 J
Explanation:
From the question given above, the following data were obtained:
Specific heat capacity (C) = 0.46 J/gºC
Mass (M) = 50 g
Initial temperature (T₁) = 20 °C
Final temperature (T₂) = 100 °C
Heat (Q) required =?
Next, we shall determine the change in the temperature. This can be obtained as follow:
Initial temperature (T₁) = 20 °C
Final temperature (T₂) = 100 °C
Change in temperature (ΔT) =?
ΔT = T₂ – T₁
ΔT = 100 – 20
ΔT = 80 °C
Finally, we shall determine the heat required. This can be obtained as follow:
Specific heat capacity (C) = 0.46 J/gºC
Mass (M) = 50 g
Change in temperature (ΔT) = 80 °C
Heat (Q) required =?
Q = MCΔT
Q = 50 × 0.46 × 80
Q = 1840 J
Thus, 1840 J of heat energy is required.
Describe how the energy is transferred from the gas hob to cook the egg in the water.
Answer:
remember the ways in which the heat is transferred:
Conduction: Heat transfer of two objects touching.
Convection: Heat transfer in a medium with a gradient of temperature.
Radiation: Heat transferred between two objects that not touch each other (an example of this is how the Sun heats up the Earth)
First, we start with the gas itself.
It has a lot of pressure, so when you open the knob, the gas can get out.
The has chemical potential energy.
When you combust the gas, you transform that energy into heat energy, as the flame touches the pot, it starts o also heat the pot.
This heat energy is transferred to the pot, which transfers heat energy to the water by conduction, the heat in the water is "distributed" by convection, and as the water starts to heat up, the energy is transferred to the egg by conduction.
A scientist is designing a device that will mimic Earth's atmosphere by
blocking high-energy waves from the Sun. Pick three high-energy waves
that the device should be able to block?
Answer:
1. Ultraviolet light (UV)
2. X-rays
3. Gamma-rays
Explanation:
Though there are different types of energy or electromagnetic waves with varying wavelengths, including the likes of Gamma X-rays, ultraviolet light, visible light, infrared radiation, and microwave radiation.
What is more certain is that the atmosphere blocked the high-energy waves from getting to the earth surface or biosphere such as Ultraviolet light (UV), X-rays and Gamma-rays
A cruise ship travels across a river at 25 meters per minute. If the river is 6200 meters wide, how long
does it take the ship to reach the other side.
Answer:
248 minutes
Explanation:
6200/25=248
This means there is 248 25s in 6200
which means it will take 248 minutes to travel through the river
Also here's a neat trick:
The units for speed is meters/minute
The units for distance is meters
Dividing distance by speed will cancel out the meters and leave only the speed.
As a light wave strikes a shiny surface like a piece of polished metal, it will be
refracted
reflected
absorbed
Please help!!!!!
GIVING BRAINLIEST PLEASE HELP!!
-if you answer correctly ill give you brainliest which will give you 25pts-
Answer:
c
Explanation:
heat is thermal energy transferred from a hotter system while temperature is a measure of the average kinetic energy of atoms or molecules in the system
Which of the following shows the relationship between work and energy?
O A. Work = total energy
B. Work = gravitational potential energy
C. Work = change in kinetic energy
D. Work = change in nonconservative forces
How does a water well affect ground water?
Answer:
Pumping a well lowers the water level around the well to form a cone of depression in the water table. If the cone of depression extends to other nearby wells, the water level in those wells will be lowered. The cone develops in both shallow water-table and deeper confined-aquifer systems.
Explanation:
Planet A has a tilt of five degrees. What seasonal changes would be expected on this planet? Extreme temperature changes between seasons Little to no change in temperatures between seasons Seasonal changes along the equator only Seasonal changes at the poles only
Answer:
Little to no change in temperatures between seasons.
Reason: because i got it right on the test, and i smart
Answer:
Little to no change in temperatures between seasons.
Explanation:
I can confirm this is right
How much time will it take for a coyote to travel 48 meters across the field to get to the unsuspecting rabbit eating grass in the field? He is travelling at 4 m/s
What is Heat engine?
Answer:
An engine made of heat!
Okay actual answer, A heat engine is a mechanical energy converter that transforms heat or thermal energy to mechanical energy.
What is this? Plz I need help...
Answer:
the time it takes for one complete back and forth swing
Explanation:
the Mark's is showing you the time it swings back and forth
Which is the best description of a high pressure system?
A.
Air cools and rises.
B.
Air warms and rises.
C.
Air cools and sinks.
D.
Air warms and sinks.
Answer:
The Answer is gonna be B.
Air warms and rises.
Waldo needs to know how much force to apply in order to move a 4000-kg object at 2 m/S2. Which law should he refer to
A.
law of gravity
B.
second law
C.
third law
D.
first law
bebe xd mexico gana siempre
Dani says, "This classroom is 11 meters long. A meter is longer than a yard, so if I measure the length of this classroom in yards, I will get less than 11 yards."
Do you agree with Dani ?
Answer:
im not sure i just need points....
Explanation:
What will be the change of velocity of a 50kg object if a force of 2,000N
is applied to it for 0.010 seconds?
Answer:
0.4m/s
Explanation:
[tex]F = ma[/tex] where F= force, m= mass, and a=acceleration
we also know that,
a = Δv / t where Δv = change in velocity and t = time
thus F = m ( Δv / t)
[tex]2000=50(\frac{v}{0.01})[/tex]
[tex]\frac{2000}{5000} = v[/tex]
0.4m/s = Δv
Determine whether the interference is constructive or destructive at each location indicated.
A.constructive or destructive
B. constructive or destructive
C. constructive or destructive
D. constructive or destructive
Answer:
A. Constructive
B. Destructive
C. Destructive
D. Constructive
Explanation:
Constructive interference takes place at locations along the path of two superposed waves where the waves are in phase such that a high or low point of one of the waves corresponds with a high or low point of the other wave which gives a resulting wave amplitude which is the sum of the amplitudes of the individual waves
Destructive interference takes place at locations along the path of two superposed waves where one wave is out of phase with the other wave such that a high or low point of one of the waves coincides with a low or high point of the other wave respectively thereby cancelling the effect of the other wave and giving a resulting wave that has an amplitude which is the difference in the amplitudes of the individual waves
Therefore;
At point A, the peak of each wave partially coincides resulting in constructive interference
At point B, the peak of the blue wave and the trough of the red wave partially coincides resulting in destructive interference
At point C, the through of the blue wave and the peak of the back wave partially coincides resulting in destructive interference
At point D, the trough of each wave partially coincides resulting in constructive interference.
A girl is walking a dog. The tension force applied to the dog is 20 N. If the mass of the dog is 25
kg.
The process of deforestation affects the different biochemical cycles on earth. Give three examples of how deforestation will affect the various cycles.
Answer:
The loss of trees and other vegetation can cause climate change, desertification, soil erosion, fewer crops, flooding, increased greenhouse gases in the atmosphere, and a host of problems for indigenous people.
What is inertia and how can you increase an object's inertia?
Answer:
Explanation:
Inertia is the property of a body by virtue of which it opposes any agency that attempts to put it in motion or, if it is moving, to change the magnitude or direction of its velocity.
The more mass, the more inertia. If you increase the mass of the object then you increase the inertia.
Answered by the ONE & ONLY #QUEEN
HOPED THIS HELPED!!
An object attached to one end of a spring makes 20 complete vibrations in 10s. Its frequency is:
O 2 Hz
.50 s
2 s
.50 Hz
Answer:
0.50 s
Explanation:
The thermal transfer of energy through a copper rod involves electrons. A second process is also involved.
Answer:
hello your question is incomplete attached below is the complete question
answer : Conduction, Lattice vibration ( B )
Explanation:
The thermal transfer of energy occurs in a solid like a copper rod following two process therefore the second process and method are
Lattice vibration and conduction
Lattice vibration is the movement/oscillation of atoms in a solid and this is caused by the change/increase in temperature applied to the solid and these vibrations will lead to the thermal transfer of energy via conduction since the atoms are bounded together .
Which of the following elements would you predict to have properties most like that of silicon, aluminum, phosphorous, or germanium?
A typical electromagnetic signal from a communications satellite might have an intensity of 0.600 pW/m2 at the surface of the Earth. Your satellite dish collects the energy of the electromagnetic signal from the satellite; then your dish passes that energy to its central receiver, where the signal can be processed by a circuit. The area of a satellite dish can be calculated from pi (3.1416) times the radius squared. If your satellite dish has a radius of 0.28 m, and if it is receiving the signal described above, how much electromagnetic energy is reflected to the central receiver in 2.5 minutes
Answer:
The answer is "22.05 pJ"
Explanation:
Using formula:
[tex]Energy=power\times time\\\\Power=Intensity \times area[/tex]
Calculating Energy:
[tex]=0.147 \times 2.5 \times 60 \times 10^{-12}\\\\=22.05\ pJ[/tex]
A bucket of water is pushed from left to
right with increasing speed across a horizontal
surface. Consider the pressure at two points
lat the same level in the water.
Answer:
It is higher at the point on the left
Explanation:
Which action MOST LIKELY occurred in order for the sugar to dissolve?
Answer:
In order for sugar to dissolve, there must be an attraction between the two substances.
Explanation:
Water and sugar are both attracted to each other, which is why sugar is able to dissolve in water.
Hope this helps! :)
Answer:
the water was stirred
Explanation:
it’s need as a type of attraction
What voltage is required to move 2A through 5Ω?
to lift
With a pulley system, you use more rope (distance), but need less (blank) to lift
the load
Ok so it is working ok!
pls help Which one of the following is NOT acceleration
A.
a change in mass
B.
a change in direction
C.
an increase in velocity
D.
a decrease in velocity
Answer:
C
Explanation:
Am increase in velocity?
Answer:
change in mass is not acceleration
Which of the following would be considered an endothermic process?
A. Fireworks exploding
B. Water freezing into ice
C. Steam condensing from a gas to a liquid
D. Water boiling