Answer:
5 m/s
Explanation:
use speed=distance/time
300/60=5
The load (mass) that a moving wagon was carrying was doubled but the force pulling the load was kept the same. Which of the following is the best assumption about the object’s acceleration?
A The object will have no acceleration.
B The object will travel at a constant speed.
C The object’s rate of acceleration will increase.
D The object’s rate of acceleration will decrease.
Answer: B
Explanation: I answered this question already at my school.
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:
change in direction
Explanation:
ans maybe correct
Which of the following statements is true with
regards to Blackbody radiation?
a)
b)
c)
A blackbody emits more energy at longer
wavelengths as it heats up
A blackbody emits energy at all wavelengths
The shape of the blackbody spectrum
depends on what the source is made of
All of the above
None of the above
00)
e)
An electric toy with a resistance of 2.50\,\Omega is operated by a 3.00\,\text{V} battery. (c) How much energy was delivered to the toy [over four hours]?
Answer:
Energy = 51840 J = 51.84 KJ
Explanation:
The electrical energy delivered to the toy can be found out by the following formula:
[tex]Energy = (Power)(time)\\Energy = (VI)(t)\\Enegry = VIt\\[/tex]
where,
V = Voltage = 3 V
R = Resistance = 2.5 Ω
I = Current = V/R (Ohm's Law) = 3 V/2.5 Ω = 1.2 A
t = time = (4 h)(3600 s/1 h) = 14400 s
Therefore,
[tex]Energy = (3\ V)(1.2\ A)(14400\ s)\\[/tex]
Energy = 51840 J = 51.84 KJ
3. What is the mass of a falling rock, accelerating at 9.8m/s²?? if it produces a force of 147N? PLEASE HELP!! I WILL GIVE BRAINLEST!!!<3
Answer:
15Explanation:
Formula
Force = mass × acceleration
147N =? × 9.8 ms2
M =
[tex] \frac{147 }{9.8} [/tex]
M = 15
Double Check
15 X 9.8
147N
Hope this helps!
What does it take to be classified as a rouge wave
Answer: A 'rogue wave' is large, unexpected, and dangerous.
At the time, surface winds were light at 15 knots. ... Most reports of extreme storm waves say they look like "walls of water." They are often steep-sided with unusually deep troughs.
Explanation:
Answer:
Rogues, called 'extreme storm waves' by scientists, are those waves which are greater than twice the size of surrounding waves, are very unpredictable, and often come unexpectedly from directions other than prevailing wind and waves.
IF SOMEONE CAN'T FIND THE ANSWER I WILL COMMIT ARSON PLEASE HELP MEE
Brainliest + random amount of points please help me It's a crossword
Answer:
Freefall
Explanation:
Hi the answer is freefall, hope this helps :)
Flossie blew a tire 5 minutes into the second leg, up to that point she had traveled 10 km making her speed 2 km/m. It took 2 minutes to fix her tire. Flossie had to finish within 2 minutes in order to stay even with the evil Mabel. If Flossie had 8 km left what speed will she need to win?
Answer:
4km/m
Explanation:
She was going at 2km/m, so 2 kilometers per minute. She has 2 minutes therefore she needs to double her rate to 4 kilometers per minute.
Using ideas of forces explain why the parachutist reaches terminal velocity and why opening the parachute reduces the terminal velocity
If e is the electric field near an infinite sheet of charge and E is electric field between two similarly charged parallel plates then what will be the relation
Answer:
* the two plates of the same sign E = 0
* the two plates of different sign E/e = 2
Explanation:
In this exercise, the relationship between the field created by a plate and two infinite plates is asked.
The electric field created by each plate has the value of "e", which is related to the charge on the electric plate.
e = [tex]\frac{ \sigma }{2 \epsilon_o}[/tex]
If the plate is negative the electric field is directed towards the plate and if the plate is positive the electric field is directed out of the plate.
The test charge is always positive.
When we have two plates, we have several possibilities
* the two plates of the same sign
therefore the resulting electric field on the test charge is
E_total = e - e
E = 0
* the two plates of different sign
E_total = e + e
E = 2 e
the relationship between the two fields is
E/e = 2
Help hurry help pls it’s timed
I think it's the yellow one
What is one benefit of a cardio kickboxing workout?
A. It is a total body exercise.
B. It focuses specifically on aerobics.
C. It focuses specifically on anaerobics.
D. It focuses on the core muscles.
Answer:
D. It focuses on the core muscles
Answer:
A. It is a total body exercise
Explanation:
In cardio kickboxing as described by my school is "
a total body exercise that combines aerobic and anaerobic workoutsan improvement in body fat compositionan efficient use of workout timea boost in confidence and self-esteemrelief of stress and increased energy levelsvaluable self-defense skillsThe first benefit is the one which we are focusing on because all the other answers are correct but A. Total body exercise is the best answer because it covers all of them as an compendious answer
Also I took the test and got this correct
how animal, plant, and bacterial cells are similar and how they are different from one another
A man lifts a 5 Newton bag of groceries
from the floor to the top of the countertop,
which is 1.1 meters tall. What is the work
done by this person in lifting groceries?
5
5.5
4.5
6
Answer:
5.5 J
Explanation:
W=F*D=5*1.1=5.5 J
Stress is __________.
A.
positive or negative, depending on circumstances
B.
a body's automatic physical response
C.
a negative reaction to outside influences
D.
A and B only
Answer:
(A)
Explanation:
Depending on the circumstances, there are such things called good stress and bad stress.
A wave is moving between two mediums, as shown in the diagram below. The
wave is slowing down and changing directions. What wave property is
illustrated?
A. Refraction
B. Resonance
C. Diffraction
D. Reflection
Answer:
Uhm i think its a
Explanation:
srry if i get it wrong ._. my bad
Answer:
the correct answer is A
When the number of gas particles at a constant pressure decreases how will the volume of the gas change?
What is important when it comes to winning
Answer:
satisfaction, enjoyment and fair play
Answer:
It is important to be a good sport, and even if you do not win still be happy about being able to participate, and congratulate the person that did win.
Explanation:
Hope this helped Bye!
What kind of energy does an electromagnet use to pick up metallic objects?
Answer:
Magnetic energy is used by an electromagnet to pick up metallic objects
Explanation:
An electromagnet generates its own magnetic field in presence of electric current.
As an electric current is induced in an electromagnet , it magnetic dipole arrange themselves in order to behave as a magnet and hence generate magnetic field with a proper north and south. This leads to attraction of metallic object.
Hence, it can be said that Magnetic energy is used by an electromagnet to pick up metallic objects
Alex swims at an average speed of 4.5 m/s how far does he swim in one minute 24 seconds
Answer:
378
Explanation:
60 seconds in one minute
add the 24 seconds
multiply it by 4.5
60 + 24 = 84
4.5 x 84 = 378
Answer:D 125
Explanation:
When light hits a second transparent medium, light-
A. Reflects and Refracts
B. Refracts only
C. Reflects only
Answer:
C. Reflects only
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
State the relationship between the pressure and the volume
volume increases with decrease in pressure
Explanation:
pressure and volume are inversely proportional. if volume increases the,pressure decreases and vice versa ,where temperature is kept constant
Which of the following elements is commonly found at the core of an electromagnet?
Lead
Cobalt
Iron
Compute the force on each of two electrons when they are seperated in vaccum by a distance corresponding to the approximate size of an ato. (0.100nm)
Answer:
2.304 × 10^-28 N
Explanation:
Compute the force on each of two electrons when they are seperated in vaccum by a distance corresponding to the approximate size of an ato. (0.100nm)
Solution
The formula to use is
F = K Qq / r^2
Substitute all the parameters
F = 9 × 10^9 × (1.6 × 10^-19)^2 / (0.1 × 10^-9)^2
F = 2.304 × 10^-28 / 1 × 10^-10
F = 2.304 × 10^-18 N
Therefore, the force between each of the electron is 2.304 × 10^-18 N
Electromagnetic radiation travels as
1.
a torsional wave
2.
a longitudinal wave
3.
a transverse wave
4.
an elliptical wave
Three resistors of 4.0 ohms, 6.0 ohms, and 12 ohms are connected in parallel to an applied potential difference of 12 volts. (1) Calculate the equivalent resistance. (2) Determine the potential difference across each resistor. (3) Calculate the current through each resistor.
Answer:
(1) 2 ohms
(2) 12 Volts Across each resistor
(3) I₁ = 3 A, I₂ = 2 A, I₃ = 1 A
Explanation:
From the question,
(1) Equilvalent Resistance (Rt) for parallel connection is
1/Rt =(1/R₁)+ (1/R₂) + (1/R₃)
Where R₁ = 4 ohms, R₂ = 6 ohms, R₃ = 12 ohms
1/Rt = 1/4 +1/6 +1/12
1/Rt = (3+2+1)/12
1/Rt = 6/12
1/Rt = 1/2
Rt = 2 ohms.
(2) Since the resistors are connected in parallel, They will have the same potential difference across them,
Hence the P.d across each resistor = 12 Volts.
(3) For R₁,
I₁ = V/R₁ = 12/4
I₁ = 3 A.
For R₂,
I₂ = V/R₂
I₂ = 12/6
I₂ = 2 A
For R₃,
I₃ = V/R₃
I₃ = 12/12
I₃ = 1 A
If a car travels 30 miles in 5 hours, how many miles per hour is the car traveling?
((Please help I need this question in no less than 20 minutes!!!))
Answer:
6 mph
Explanation:
30 miles/5 hours = 6 mph
Question 5 of 10
What happens when a loop of wire turns between two permanent magnets in
a generator?
A. A current flows through the loop of wire.
O B. Electrical energy transforms into mechanical energy.
O C. A current flows through the permanent magnets.
D. Mechanical energy transforms into electromagnetic radiation.
Answer:
B. Electrical energy transforms into mechanical energy.
Explanation:
In the case when the wire loop transforms between the two permanent magnets in a generator so here the electrical energy turns to mechanical energy as there is a working principle behind the generator that the electrical energy would turns into mechanical energy
Therefore as per the given scenario, the option b is correct
And, the rest of the options are wrong
A machine designed to stretch a stiff spring uses 1,550 J of energy to stretch the spring. If the work output is 1,200 J, what is the machine’s efficiency?
Answer:
77%
Explanation:
efficiency= work output/work input X 100%
e = 1,200j/ 1,550 j x100%
e = 1,200/1,550= 0.77
e = 0.77 x 100%
e = 77%
