Answer:
150
Explanation:
30 times 5 = 150 i think
When a hot object makes a cold object warmer what is it called
If C is the vector sum of A and B, C = A + B, What must be true if C = A + B?. What must be true if C = 0?.
M= 1000 g g= 10 m/s2 h= 10 K.E at GROUND = 400 j M.E = ....... ........J the answer is 400 so plz explain how
Answer:
M = 500 J
Explanation:
Given that,
Mass, M = 1000 g = 1 kg
Height, h = 10 m
Potential energy is given by :
P = mgh
P = 1×10×10
P = 100 J
The kinetic energy at ground = 400 J
Mechanical energy = sum of kinetic and potential energy
So,
M = 100 + 400
M = 500 J
So, the mechanical energy of the system is 500 J.
What are the mechanical advantage and mechanical efficiency of a lever that requires an input force of 40 N and lifts and lifts a boulder that weighs 80 N?
Answer:
2 , 200%
Explanation:
Mechanical advantage of a machine is defined as how much the machine multiplies the applied force.
It is given that :
Input force of the lever = 40 N
The weight of the boulder or the output force = 80 N
Therefore, the mechanical advantage = output force / input force
[tex]$=\frac{80}{40}$[/tex]
= 2
Mechanical efficiency is obtained by the dividing the output by the input and multiplying it with 100.
i.e. Efficiency = output / input x 100
[tex]$=\frac{80}{40}\times 100$[/tex]
= 200 %
formula of average speed
Answer:
Hey mate....
Explanation:
This is ur answer.....
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Miles Tugo is camping in Glacier Canyon and he makes a loud holler. The sound bounces off the nearest canyon wall (which is located 170 meters away from Miles) and returns to Miles.
Determine the time elapsed between when Miles makes the holler and the echo is heard.
Answer:
It would take 1 s to hear the echo.
Explanation:
Here, the sound covered a total of 340 meters, since it bounces off the canyon wall and travels back to Miles in the form of echo.
The time elapsed can be determined by,
v = [tex]\frac{2D}{t}[/tex]
⇒ t = [tex]\frac{2D}{v}[/tex]
where: v is the speed of sound in air (343 m/s), D is the distance of the nearest canyon (170 m).
So that,
2D = 2 x 170 = 340 m
Thus,
t = [tex]\frac{340}{343}[/tex]
= 0.9913 s
t = 1 s
It takes 1s for Miles to hear his echo.
How do you find component velocities of parallel vectors?
Answer:
Velocity is a vector (it has magnitude and direction), so the overall velocity of an object can be found with vector addition of the x and y components: v2 = vx2 + vy2. The units to express the horizontal and vertical distances are meters (m).
What is the momentum of a 4000g object moving to the left (negative direction) at 25 m/s?
Answer:
-100 kg · m/s
Explanation:
We can find the momentum of an object using the formula:
p = mv where p = momentum (kg * m/s), m = mass (kg), v = velocity (m/s), and p and v are vectorsLet's start by converting the mass of the object to kilograms.
4000 g → 4 kgSince the left direction is the negative direction, we know that the velocity of the object is -25 m/s.
Using these variables, we can solve for p in the formula.
p = mv p = (4 kg)(-25 m/s) p = -100 kg · m/sThe momentum of the object is -100 kg · m/s.
2. How does laser light differ from
normal light?
Answer:
Laser light differs from normal light because laser lights are monochromatic which means it only shines one color and only that color :3
Explanation:
:3
What is the momentum of a 0.5 kg football thrown -5 m/s to the left?
Answer: -2.5 kg/m/s
Explanation: Momentum is equal to mass times velocity, so you do 0.5 kg times -5 m/s, and you get -2.5 kg/m/s.
When you blow across the top of
a soda bottle, it acts like a closed
pipe. If it creates a fundamental
frequency of 680 Hz, how deep
is the bottle?
(Speed of sound = 343 m/s)
(Unit = m)
Please need help!!!!
Answer:
the new foundation would beExplanation:
ok
A force of 100N stretches an elastic string to a total length of 20cm. if an additional force of 100N stretches the spring 5 cm further, find the natural length of the spring if the elastic limit is not exceeded. Pls help ASAP
Answer:
8cm
Explanation:
The general formula to find this is F/X where in this case the f is the total of the two forces (100+100) and x is the sum of the length ( 20+5) which together comes 200&25respectively then divide 200 with 25 which comes 8cm.
DO NOW: You are picking up a pendulum (Clay ball on a string) as you pull the pendulum up on one side and let it fall, what types of energy are being used?
Answer:
The energy used in the pendulum is the initial Potential (Mechanical) Energy, P.E. given to the Clay ball attached to the inclined and extended string by virtue of its elevated position in relation to the rest position (lower state)
The swinging of the pendulum is brought about by the dynamic equilibrium between the initial potential energy, P.E. and the Kinetic Energy, K.E., of the pendulum when it is in motion
The (total) Mechanical Energy, M.E. of the ideal pendulum is constant at all times during the motion of the pendulum and it is given by the following formula;
M.E. = P.E. + K.E.
At the top of the swing, P.E. is maximum and K.E. is zero
Similarly, at the mid (lowest) point in the swing, instantaneously, P.E. is zero and K.E. is maximum
Explanation:
What is the kinetic energy of a 25 kg object moving at a velocity of 4 m/s?
Thus Kinetic energy of the object is 200J when mass is 25 kg and velocity is 4 m/s.
The parking brake on a 1200kg automobile has broken, and the vehicle has reached a momentum of 7800kg.M/s. What is the velocity of the vehicle?
What acceleration would be achieved by a 5N thrust motor in a 0.30kg
Answer:
F=ma
5N=0.3a
a=5/0.3=16.66m/s²
PLEASE GIVE BRAINLIEST
Answer:
16.7
Explanation:
acceleration=force/mass
A car traveled a distance of 30 km in 20 minutes (1/3 hours). What was the
speed of the car?
O A. 90 km/hr
O B. 60 km/hr
O c. 30 km/hr
O D. 10 km/hr
I NEED HELP ASAP!!!
The product of the component of a force along the direction of displacement and the magnitude of the displacement are known as:
a.
net force
c.
velocity
b.
work
d.
power
Answer:
a
Explanation:
thats yes according to kinematics
Two dogs are pulling on a chew toy. One dog pulls the chew toy with 64 N [E] and
the other pulls the chew toy with 31 N [W]. Determine the ACCELERATION of the 3
kg chew toy.
Answer:
Eastward, at 11 m/s^2
Explanation:
64N-31N=unbalanced force of 33N
F=ma
33N=(3kg)a
a=11m/s^2 to the East
Water uptake to the atmosphere occurs through the processes of evaporation and transpiration from plants where it condenses to form clouds. Clouds release the water through precipitation. During a summer of extreme drought, what can we expect to happen to the surface groundwater stored in ponds and lakes?
a. Water levels will increase because there is more precipitation
b. Animals won't drink as much to save water, so water levels remain the same
c. Water levels will increase because there are more evaporation and transpiration
d. Water levels will decrease because there are more evaporation and transpiration
water level will decrease because there are more evaporation and transpiration
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.
Which would increase the speed of a sound wave?
Answer:
I would say temperature
A tractor pulls a 978 kg wagon at a velocity of 4.9 m/s. How many watts of power are exerted by the tractor motor is the tractor pulls the wagon at a 60 degree angle?
Answer:
23481.78 W
Explanation:
The computation of number of watts of power is shown below:
M = 978 kg
V = 4.9 m/s
Theeta = 60°
As we know that
P = Fcos(theeta).V
F = Mg
P = (Mg)cos(theeta).V
P = 978×9.8×cos(60)×4.9
P = 23481.78 W
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A car is moving at 11m/s and has a mass of 1200 kg. What is the momentum of her car?
(no links please!)
Answer:
momentum= mass x velocity
= 11 x 1200 =13200kgm/s
An egg sinks in fresh water but floats on concentrated salt solution
the salt solution exerts a greater up thrust on the egg which balances the weight of the egg, so the egg floats in a strong salt solution but sinks in fresh water
what is specific heat capacity?
Specific heat capacity is defined as the amount of heat required to raise the temperature of 1 kilogram of a substance by 1 kelvin (SI unit of specific heat capacity J kg−1 K−1). From: Basic Physics and Measurement in Anaesthesia (Fourth Edition), 1995.
Which statement correctly describes these electric field lines
Answer:
ok
Explanation:
the correct answer is C please follow me
Which statements describe how heat flows in foil? Check all that apply.
Answer:
Heat flows from a warmer object to a cooler object.Why are temperatures of the currents generally colder at the poles than the equator?
A. Tilt of the Earth on its axis
B. Angle of the sun's rays are less direct
C. Angle of the sun's rays are more direct
D. The Earth's revolution around the sun.
Answer:
the answer is A
Explanation: